Machine tool device

Abstract

The invention is based on a machine tool device comprising at least one motor- driven machining tool (12a-12e), at least one sensor unit (14a-14e), in particular of capacitive type, which is designed to sense at least one foreign object (16a, 18a) in at least one detection region (20a; 20b, 22a, 24a) surrounding the machining tool (12a-12e), and at least one control and / or regulating unit (26a-26e), which is designed to trigger at least one action in dependence on at least one signal of the sensor unit (14a-14e). It is proposed that the sensor unit (14a-14e) comprises at least one antenna (28a-28e, 30a-30e, 32a; 32b; 32e, 34a, 36a), which is designed to emit at least one electric and / or magnetic field, which defines the at least one detection region (20a; 20b, 22a, 24a), and / or to sense the at least one foreign object (16a, 18a) in dependence on at least one change of the at least one electric and / or magnetic field.

Description

BACKGROUND

[0001] A machine tool device having at least one motor- driveable machining tool; at least one sensor unit, in particular a capacitive sensor unit, which is designed to sense at least one foreign object in at least one detection region surrounding the machining tool; and at least one control and / or regulating unit, which is designed to trigger at least one action depending on at least one signal of the sensor unit, has been proposed. SUMMARY

[0002] The present application is based on a machine tool device having at least one motor- driveable machining tool; at least one sensor unit, in particular a capacitive sensor unit, which is designed to sense at least one foreign object in at least one detection region surrounding the machining tool; and at least one control and / or regulating unit, which is designed to trigger at least one action depending on at least one signal of the sensor unit.

[0003] It is proposed here that the sensor unit comprises at least one antenna, which is designed to emit at least one electric and / or magnetic field, which defines the at least one detection region; and / or to sense at least one foreign object depending on at least one change of the at least one electric and / or magnetic field.

[0004] Preferably, the machine tool comprises the machine tool device. Preferably, the machine tool device is configured as an electrically operated machine tool device. In particular, the machine tool is configured as an electric machine tool. In particular, the machining tool can be driven by at least one electric motor of the machine tool device. Preferably, the machine tool device comprises at least one electric energy storage unit, in particular a battery, for energizing the at least one electric motor. Alternatively, it is conceivable that the machine tool device is configured as a pneumatically operated machine tool device, a gasoline operated machine tool device, etc. Preferably, the machine tool device is designed for cutting, sawing, planing, grinding or other machining of a workpiece, which appears meaningful to the person skilled in the art. In particular, the machine tool can be configured as a circular saw, in particular a hand-held circular saw, a table circular saw, a cross-cut and / or miter-cut saw, etc., as an angle grinder, a planer, etc. In particular, the machining tool is configured as a saw blade, in particular a circular saw blade, a grinding wheel, a planing roller or other machining tools, which appear meaningful to the person skilled in the art. "Designed" is to be understood in particular as being equipped in particular and / or set in particular. "Configured" is to be understood in particular as being programmed in particular and / or designed in particular. A certain object being designed or configured for a certain function is to be understood in particular as the object fulfilling and / or implementing the certain function in at least one application and / or operating state.

[0005] The sensor unit is preferably configured as an electrical and / or magnetic sensor unit, in particular as a capacitive sensor unit. In particular, the sensor unit is configured as a sensor unit which is different from a visual, acoustic, haptic, etc. sensor unit. In particular, the sensor unit is provided for proximity detection. Preferably, the sensor unit is provided for sensing a foreign object before contact with the machining tool. In particular, the sensor unit is provided for sensing a foreign object in at least a defined distance from the machining tool, in particular within a detection area which surrounds the machining tool. The detection area is in particular an area which extends around the machining tool, in which area the sensor unit is able to and is set up for detecting a foreign object. Preferably, the detection area extends asymmetrically around the machining tool. Preferably, the detection area has a greater extension along a cutting edge of the machining tool than at other locations of the machining tool, in particular at locations which are dangerous for an operator of the machine tool device. It is alternatively conceivable for the detection area to extend symmetrically, in particular spherically, around the machining tool.

[0006] A "foreign object" is in particular to be understood as an object which is located in the detection area or which moves in the detection area, which in particular impedes the machining process. The foreign object can in particular constitute a living object, in particular at least one body part of an operator, for example a hand, a finger, a leg, etc., and be configured as an animal or another living object which appears sensible to the person skilled in the art. The foreign object can in particular constitute an inanimate object, in particular an interfering object which is arranged on the workpiece and / or extends in the vicinity of the workpiece, for example a nail, an electrical current conductor, a water line, etc.

[0007] A "control and / or regulating unit" is in particular to be understood as a unit which has at least one control electronics. A "control electronics" is in particular to be understood as a unit which has a processor unit and a memory unit and a running program stored in the memory unit. Preferably, the control and / or regulating unit is connected in signal transmission technology with the sensor unit, in particular via at least one signal line. It is alternatively or additionally conceivable for the control and / or regulating unit to be connected in signal transmission technology with the sensor unit via a wireless signal connection. Preferably, the control and / or regulating unit is provided for actuating the sensor unit. The sensor unit is in particular provided for providing at least one signal, preferably a plurality of signals, to the control and / or regulating unit, in particular depending on the sensing of at least one foreign object in the detection area. Preferably, the control and / or regulating unit is provided for analysing at least one signal received by the sensor unit. In particular, the control and / or regulating unit is provided for triggering at least one action depending on the analysis of at least one signal of the sensor unit.

[0008] The at least one action preferably constitutes a safety function, in particular for preventing or at least reducing injuries to the operator, and / or a comfort function, in particular for making the operation of the machine tool device easier for the operator. The at least one action can in particular constitute a braking of the machining tool, a moving away of the machining tool from a danger zone, a shielding of the machining tool, an outputting of at least one, in particular visual, acoustic and / or haptic, warning message, a dialing of an emergency call, or other actions that appear meaningful to the person skilled in the art. In particular, the control and / or regulating unit can be configured to trigger a plurality of, in particular different, actions. Preferably, the control and / or regulating unit can be configured to trigger different actions depending on different signals of the sensor unit. In particular, the control and / or regulating unit is configured to actuate at least one reaction unit of the machine tool device depending on at least one signal of the sensor unit, in particular in order to trigger the at least one action, the reaction unit being configured to perform the at least one action. The at least one reaction unit can in particular be configured as a braking unit, a covering unit, a swiveling unit, a blocking unit, an output unit, a communication unit or other units that appear meaningful to the person skilled in the art.

[0009] The at least one antenna is preferably configured to guide an electric current. In particular, the at least one antenna is configured as a column, in particular as a cylinder. In particular, the at least one antenna is configured to emit an electric field that is distributed radially symmetrically around a longitudinal axis of the antenna and / or a magnetic field that is distributed concentrically around the longitudinal axis of the antenna. The "longitudinal axis" of a particularly cylindrical object is in particular to be understood as an axis that is oriented perpendicular to a cross section of the object that is developed by a lateral extension dimension of the object, in particular by a cylinder radius. The term "perpendicular" is in particular to be defined as an orientation of a direction relative to a reference direction, wherein the direction and the reference direction enclose an angle of 90°, in particular in a projection plane, and wherein the angle has a maximum deviation of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°. Preferably, the at least one antenna is configured as an electric cable, in particular as a coaxial cable, a metal wire or the like. It is also conceivable that the antenna is composed of a plurality of electrodes. Thereby, the action zone of the generated electric and / or magnetic field can be advantageously controlled. Alternatively or additionally, it is conceivable that the machining tool and / or a driven shaft on which the machining tool is supported constitutes the at least one antenna and / or that the at least one antenna is configured to be electrically coupled with the machining tool and / or the driven shaft. Preferably, the machining tool constitutes the at least one antenna, wherein the sensor unit has at least one further antenna that is configured separately from the machining tool. Alternatively or additionally, it is conceivable that the at least one antenna is configured separately from the machine tool device, in particular arranged on the operator, for example on a glove or on goggles of the operator.

[0010] In particular, at least one antenna is configured to emit at least one electromagnetic field. Specifically, the electric and / or magnetic fields, especially electromagnetic fields, of the at least one antenna, and particularly the field strength and / or maximum extension of the electric and / or magnetic fields, are related to the voltage acting on the at least one antenna and / or the current flowing through it. Specifically, the detection area has at least substantially the same shape as the electric and / or magnetic fields, especially electromagnetic fields, of the at least one antenna. Specifically, the boundary of the detection area is defined by the sum of all distances surrounding the at least one antenna, which have the same minimum, especially a predetermined, field strength for the electric and / or magnetic fields of the at least one antenna. Preferably, at least one antenna is arranged in the vicinity of the machining tool. Specifically, the sensor unit may have multiple antennas, particularly for achieving complete coverage of the machining tool along with the detection area. Specifically, the sensor unit may have at least two antennas, preferably at least four antennas, particularly preferably at least six antennas, and completely particularly preferably at least eight antennas.

[0011] Preferably, at least one antenna is configured to sense foreign objects based on changes in the electric and / or magnetic fields emitted by the at least one antenna. Alternatively or additionally, it is conceivable that at least one antenna is configured to sense foreign objects based on changes in the electric and / or magnetic fields emitted by another antenna, particularly another antenna. In particular, the sensor unit may include at least two antennas, wherein a first antenna is configured to emit an electric and / or magnetic field, and a second antenna is configured to sense foreign objects based on changes in the electric and / or magnetic fields of the first antenna. In particular, foreign objects arranged in the detection area, and especially based on the characteristics of the electric and / or magnetic fields of the foreign objects, change the characteristic parameters of the electric field. Preferably, at least one antenna is configured to capacitively sense foreign objects, especially based on changes in the capacitance of the electric and / or magnetic fields caused by the foreign object. Alternatively or additionally, it is conceivable that at least one antenna is configured to inductively sense foreign objects, especially based on changes in the inductance of the electric and / or magnetic fields caused by the foreign object. Preferably, at least one antenna is configured to sense the distance between the foreign object and the processing tool, in particular the position of the foreign object at least relative to the processing tool, the speed of movement of the foreign object, in particular the approach speed to the processing tool and / or the acceleration of the foreign object, in particular the approach acceleration to the processing tool.

[0012] The sensor unit preferably includes, particularly in at least one embodiment, a tuning circuit connected to an antenna. This tuning circuit is specifically configured to generate an electric and / or magnetic field by interacting with the antenna. The tuning circuit preferably consists of at least one oscillating circuit, particularly an RLC oscillating circuit, and a phase stabilizing circuit. Preferably, the operating frequency of the tuning circuit is less than 5 MHz. However, alternatively, the operating frequency of the tuning circuit may be greater than 5 MHz. The tuning circuit particularly has at least one amplifier, which is, for example, composed of a field-effect transistor, a bipolar transistor, a power amplifier, etc. Furthermore, different amplifier topologies can be considered, such as scalable topologies, two-stage amplifier topologies, cascaded topologies, etc. The tuning circuit is preferably connected to a signal preparation unit, particularly an analog-to-digital converter, wherein the signal preparation unit is at least connectable to a control and / or adjustment unit for signal transmission. The signal preparation unit preferably includes at least one comparator, particularly a Schmitt trigger, which is capable of converting the analog signal from the antenna, preferably, into a digital signal.

[0013] The machine tool device according to the invention can advantageously achieve reliable detection of at least one foreign object in the detection area. Advantageously, foreign objects can be detected preventively, especially before contact with the machining tool. Advantageously, sufficient time can be provided by sensing for performing at least one action. Advantageously, the risk of injury to the operator can be minimized. Advantageously, costly, complex, and / or damaging high-speed response systems can be eliminated. Advantageously, a machine tool device with operational safety, comfort, and low wear can be provided.

[0014] Furthermore, it is proposed that the control and / or adjustment unit is configured to match at least one parameter at least partially independently based on at least one operating parameter. The at least one operating parameter may in particular constitute motion parameters, such as the speed of movement of a machine tool assembly; orientation parameters, such as the spatial orientation of a machine tool assembly; machining parameters, such as the insertion depth of a machining tool; operator-specific parameters, such as the operator's skin conductivity; or other parameters that appear meaningful to those skilled in the art. The at least one parameter to be matched may in particular constitute the sensitivity of a sensor, the detection area, especially the extension scale of the detection area, the shape of the detection area, etc.; the type of at least one action to be triggered; the sequence of multiple actions to be triggered; the triggering speed and / or execution speed of at least one action, such as the braking speed of a machining tool; or other parameters that appear meaningful to those skilled in the art.

[0015] Preferably, the control and / or regulation unit is configured to analyze and process at least one operating parameter. Preferably, the control and / or regulation unit is configured to match at least one parameter at least partially independently based on the analysis and processing of at least one operating parameter. Preferably, the control and / or regulation unit is configured to match at least one parameter completely independently, particularly automatically, for example, by comparing at least one operating parameter with a control routine stored in a memory unit of the control and / or regulation unit. Alternatively, it is conceivable that the control and / or regulation unit is configured to match at least one parameter partially independently. The control and / or regulation unit can be particularly configured to provide the operator with at least one suggestion for matching at least one parameter based on at least one operating parameter, particularly based on the analysis and processing of at least one operating parameter, for example, through the output unit of the machine tool, and to match at least one parameter based on operator input. Preferably, the control and / or regulation unit is configured to match at least one parameter, particularly multiple parameters, at least partially independently based on multiple operating parameters. Preferably, the control and / or regulation unit can be configured to match multiple parameters at least partially independently based on at least one operating parameter. Advantageously, to improve operational safety, at least semi-automation of the machine tool and coordination with operator comfort can be achieved (Abstimmung).

[0016] Furthermore, it is proposed that the control and / or adjustment unit is configured to calibrate the sensor unit, particularly matching at least one detection area, at least partially independently based on at least one operating parameter. Specifically, the control and / or adjustment unit is configured to perform sensor unit calibration at least partially independently as part of the machine tool's access process and / or based on operator input. Preferably, the control and / or adjustment unit is configured to calibrate the sensor unit, particularly matching the detection area, completely independently and particularly automatically based on at least one operating parameter, particularly based on the analysis of at least one operating parameter. Alternatively, the control and / or adjustment unit can be configured to calibrate the sensor unit partially independently. In particular, the control and / or adjustment unit can be configured to provide the operator with at least one suggestion for calibrating the sensor unit, for example, through the machine tool's output unit, and to calibrate the sensor unit based on operator input, based on at least one operating parameter, particularly based on the analysis of at least one operating parameter.

[0017] In particular, the control and / or adjustment unit is configured to at least partially independently match the detection area of ​​the sensor unit, particularly the extended scale and / or shape of the detection area, according to at least one operating parameter, particularly according to the analysis of at least one operating parameter, for the purpose of calibrating the sensor unit. Alternatively or additionally, it can be conceivable that the control and / or adjustment unit is configured to at least partially independently match the sensitivity of the sensor unit, the sensor unit's responsiveness to a defined foreign object, particularly to a defined material, or other parameters of the sensor unit that appear meaningful to those skilled in the art, according to at least one operating parameter, particularly according to the analysis of at least one operating parameter, for the purpose of calibrating the sensor unit. For example, it can be considered that the sensor unit is configured to sense the surrounding environment of the machine tool, particularly during the access process of the machine tool, wherein the control and / or adjustment unit is configured to calibrate the sensor unit according to the sensed surrounding environment. For example, it can be considered that the sensor unit senses the operator's body portion in the vicinity of the machining tool, the body portion being arranged there for guiding the machine tool, wherein the control and / or adjustment unit reduces the detection area and / or decreases the sensitivity of the sensor unit, particularly in order to reduce false triggering caused by the body portion in the vicinity of the machining tool. Advantageously, to improve operator safety and comfort, at least semi-automatic calibration of the sensor unit can be achieved.

[0018] Furthermore, it is proposed that at least one operating parameter constitutes a motion parameter and / or an orientation parameter. The at least one operating parameter constituting a motion parameter can in particular constitute the machine tool's speed, acceleration, direction of motion, or other motion parameters that appear meaningful to those skilled in the art. The at least one operating parameter constituting an orientation parameter can in particular constitute the spatial orientation of the machine tool, especially its orientation relative to the workpiece, relative to the vertical axis of the machine tool, relative to the longitudinal axis of the machine tool, and / or relative to the transverse axis of the machine tool. For example, it can be considered that the control and / or adjustment unit is configured to trigger braking as an action as quickly as possible based on the sensed speed of the machine tool's movement. For example, it can be considered that the control and / or adjustment unit is configured to trigger braking as an action as quickly as possible based on the sensed free fall of the machine tool. Advantageously, to improve operator safety and comfort, at least semi-automatic coordination of the machine tool can be achieved based on at least one motion parameter and / or based on at least one orientation parameter.

[0019] Furthermore, it is proposed that at least one operating parameter constitutes a machining parameter. This at least one operating parameter constituting a machining parameter can in particular constitute the insertion depth of the machining tool in the workpiece, the inertial characteristic parameters of the machining tool, workpiece characteristics, especially workpiece hardness, workpiece thickness, workpiece material, workpiece moisture content, the kickback of the machine tool assembly, the power consumption and / or revolutions of the motor driving the machining tool, the revolutions of the machining tool, or other machining parameters that appear meaningful to those skilled in the art. For example, it can be considered that the control and / or adjustment unit is configured to adjust the detection area as the sensed insertion depth of the machining tool increases. Advantageously, to improve operator safety and comfort, at least semi-automatic coordination of the machine tool assembly can be achieved based on at least one machining parameter.

[0020] Furthermore, it is proposed that at least one operating parameter constitutes an operator-specific parameter. This operator-specific parameter may in particular constitute the operator's skin conductivity, operator-specific working style, especially operator-specific work movements, operator-specific operation of the machine tool, operator's level of experience, or other operator-specific parameters that appear meaningful to those skilled in the art. For example, it can be considered that the control and / or adjustment unit is configured such that the greater the operator's level of experience, the lower the sensitivity of the sensor unit. Advantageously, to improve operator safety and comfort, at least semi-automatic coordination of the machine tool can be achieved based on at least one operator-specific parameter.

[0021] Furthermore, it is proposed that the machine tool device includes at least one additional sensor unit configured to sense at least one operating parameter. Preferably, the other sensor unit includes at least one sensor element for sensing at least one operating parameter. The sensor unit may in particular include multiple, particularly different, sensor elements, especially multiple different sensor elements corresponding to multiple different operating parameters to be sensed. Preferably, the other sensor unit is configured to provide at least one sensed operating parameter to a control and / or regulation unit, particularly in the form of at least one electrical signal. Alternatively or additionally, it may be considered that the sensor unit, especially at least one antenna of the sensor unit, is configured to sense at least a determined operating parameter. In particular, the other sensor unit may have at least one sensor element configured as an accelerometer for sensing at least one operating parameter constituting a motion parameter. In particular, the other sensor unit may have at least one sensor element configured as a position sensor, especially a gyroscope, for sensing at least one operating parameter constituting an orientation parameter. In particular, the other sensor unit may have at least one sensor element configured as an optical sensor, humidity sensor, accelerometer, inertial sensor, temperature sensor, current and / or voltage sensor, rotational rate sensor, etc., for sensing at least one operating parameter constituting a machining parameter. In particular, another sensor unit may have at least one sensor element configured as a conductivity sensor, fingerprint scanner, face scanner, etc., in order to sense at least one operating parameter that constitutes a parameter specific to the operator.

[0022] Preferably, another sensor unit, particularly at least one sensor element of the other sensor unit, is arranged on and / or within the housing unit of the machine tool assembly. Alternatively or additionally, it is conceivable that the other sensor unit is arranged separately from the housing unit of the machine tool assembly and, in particular, has at least one communication unit, especially wireless, for transmitting at least one sensed operating parameter to the control and / or regulation unit. Preferably, the other sensor unit is configured to sense at least one operating parameter, particularly continuously and / or during the engagement process of the machine tool assembly. For example, it can be considered that the other sensor unit is configured to sense the operating parameter constituting the inertia of the machining tool as the speed of the machining tool increases to the operating speed. Advantageously, user-friendly, particularly automatic, sensing of at least one operating parameter can be achieved.

[0023] Furthermore, it is proposed that another sensor unit has at least one sensor element configured to sense at least one conductivity characteristic parameter of at least one operator. Preferably, the sensor element is constructed as a conductivity sensor. The conductivity characteristic parameter particularly describes the ability to guide current. In particular, the conductivity characteristic parameter constitutes the skin conductivity of the operator, especially at least one hand of the operator. Preferably, the conductivity characteristic parameter constitutes an operator-specific parameter. Preferably, the sensor element is arranged on at least one handle of the machine tool device. Preferably, the control and / or adjustment unit is configured to at least partially independently match at least one parameter, especially calibrate the sensor element, based on the sensed conductivity characteristic parameter, especially based on the analysis processing of the sensed conductivity characteristic parameter. In particular, different conductivity characteristic parameters, such as different operators, different wet hands, different warm hands, hands with different blood pressure circulation, etc., cause different intensities of electric and / or magnetic fields, especially capacitance changes, in at least one antenna. Preferably, the control and / or adjustment unit is configured to calibrate the sensor element differently based on different conductivity characteristic parameters, especially to adjust the sensitivity of the sensor element differently. In particular, the control and / or adjustment unit is configured such that the lower the operator's conductivity characteristic parameter, especially skin conductivity, the higher the sensitivity of the sensor element is adjusted. Advantageously, in order to improve operator safety and comfort, at least semi-automatic coordination can be achieved between the machine tool device, especially the sensor unit, and the operator's electrical and / or magnetic characteristics, especially the capacitive characteristics.

[0024] Furthermore, it is proposed that the machine tool device includes at least one, particularly wireless, communication unit configured to receive at least one operating parameter from at least one external unit. The communication unit of the machine tool device is preferably constructed as a wireless communication unit, particularly a wireless local area network (WLAN) module, a radio module, a Bluetooth module, a near-field communication module, etc. Alternatively or additionally, it is conceivable that the communication unit of the machine tool device is constructed as a wired communication unit, particularly a USB connection port, an Ethernet connection port, a coaxial connection port, etc. Preferably, the communication unit of the machine tool device is connected to the control and / or regulation unit in terms of signal transmission technology, particularly via at least one signal line. In particular, the communication unit of the machine tool device is configured to provide at least one operating parameter to the control and / or regulation unit, particularly in the form of at least one electrical signal.

[0025] The external unit can be configured, in particular, as a smartphone, server, especially a cloud server and / or database server, augmented reality (AR) glasses, computer, external sensor unit, or other external unit that appears meaningful to those skilled in the art. In particular, the external unit is configured separately from the machine tool device. Preferably, the external unit is configured to sense, store, and / or acquire at least one operating parameter, for example from another sensor unit, a database, the Internet, or other sources that appear meaningful to those skilled in the art. In particular, the external unit includes at least one communication unit configured to transmit at least one operating parameter to the machine tool device, especially the communication unit of the machine tool device. The communication unit of the external unit can, in particular, be configured to be at least substantially similar to the communication unit of the machine tool device. Preferably, the communication unit of the machine tool device can be configured to provide the external unit with identification data about the machine tool device, wherein the external unit of the machine tool device can, in particular, provide at least one operating parameter suitable for the identification data. Advantageously, it provides the possibility of providing another operator comfort for obtaining at least one operating parameter.

[0026] Furthermore, it is proposed that the control and / or regulation unit is configured to trigger at least one action based on a common analysis of at least one signal from the sensor unit and at least one operating parameter. In particular, the control and / or regulation unit is configured to analyze, in particular, weight, the at least one signal from the sensor unit while considering at least one operating parameter, and / or analyze, in particular, weight, the at least one operating parameter while considering at least one signal from the sensor unit. In particular, the control and / or regulation unit may be configured to prohibit at least one action based on a common analysis of at least one signal from the sensor unit and at least one operating parameter. In particular, the control and / or regulation unit may be configured to trigger at least one action, in particular multiple actions, based on a common analysis of at least one signal from the sensor unit, in particular multiple signals from the sensor unit, and at least one operating parameter, in particular multiple operating parameters. Advantageously, high operational safety can be achieved, and false triggering can be minimized.

[0027] Furthermore, it is proposed that the control and / or adjustment unit is configured to trigger different actions based on different results of a common analysis and processing of at least one signal from the sensor unit and at least one operating parameter. Preferably, the control and / or adjustment unit is configured to trigger at least one action based on the result of a common analysis and processing of at least one signal from the sensor unit and at least one operating parameter, which can achieve an optimized combination of operational safety and operational comfort. For example, it can be considered that the control and / or adjustment unit is configured to trigger motor braking of the motor driving the machining tool based on the small approach speed of the foreign object approaching the machining tool and the small inertia of the machining tool, especially for achieving stationary braking of the machining tool before contact with the foreign object while under a small mechanical load. For example, it can be considered that the control and / or adjustment unit is configured to trigger mechanical braking of the machining tool in addition to motor braking of the motor driving the machining tool (which, in the current situation, can in particular, brake the machining tool to a stop before the foreign object contacts the machining tool) based on the higher approach speed of the foreign object approaching the machining tool and the larger inertia of the machining tool. In particular, the memory unit of the control and / or regulation unit provides multiple possible results of the common analysis and processing of at least one signal from the sensor unit and at least one operating parameter, preferably each possible result is associated with an action to be triggered. Preferably, the control and / or regulation unit is configured to trigger at least one action associated with a corresponding result of the analysis and processing. Advantageously, a reliable machine tool device with high operator comfort and high operator safety can be provided.

[0028] Furthermore, it is proposed that the sensor unit is configured to provide multiple detection areas with different radii around the machining tool. Preferably, at least one antenna is configured to provide multiple detection areas with different radii around the machining tool. Alternatively or additionally, the sensor unit may include multiple antennas, particularly multiple antennas corresponding to the number of detection areas to be provided, wherein, in particular, each antenna is configured to provide at least one of the multiple detection areas. "Radius of the detection area around the machining tool" should be understood in particular as the maximum extension scale of the detection area from the machining tool, wherein the sensor unit is also configured to sense foreign objects. Preferably, the detection areas are constructed in a layered or bowl-shaped manner, particularly cylindrical bowl-shaped, spherical bowl-shaped, etc. In particular, the detection areas have equidistant extension scales when viewed along the radius of the detection area. Alternatively, it can be conceivable that the detection areas have different extension scales when viewed along the radius of the detection area.

[0029] The control and / or adjustment unit is preferably configured to determine the distance between the foreign object and the processing tool based on the sensing of the foreign object in a defined detection area. In particular, the control and / or adjustment unit is configured to determine the movement speed of the foreign object, especially its approach speed to the processing tool, based on the time elapsed between sensing foreign objects in two different, particularly adjacent, detection areas and the extent of the detection areas. Preferably, the control and / or adjustment unit is configured to determine the movement acceleration of the foreign object, especially its approach acceleration to the processing tool, based on the different movement speeds determined in different detection areas. Advantageously, this enables particularly precise sensing and tracking of foreign objects.

[0030] Furthermore, it is proposed that the control and / or adjustment unit is configured to cascade different actions based on different signals from the sensor unit, corresponding to the sensing of at least one foreign object in different detection areas. In particular, the control and / or adjustment unit is configured to cascade different actions based on different distances between the foreign object and the machining tool. The phrase "cascade different actions" should be understood in particular as the control and / or adjustment unit being configured to sequentially trigger multiple different actions. It is particularly conceivable that the control and / or adjustment unit is configured to trigger an output warning signal based on a signal from the sensor unit, corresponding to the sensing of a foreign object in a first detection area having the maximum distance from the machining tool. It is particularly conceivable that the control and / or adjustment unit is configured to trigger the shutdown of the motor driving the machining tool based on a signal from the sensor unit, corresponding to the sensing of a foreign object in a second detection area having a smaller distance from the machining tool than the first detection area. It is particularly conceivable that the control and / or adjustment unit is configured to trigger the mechanical braking of the machining tool based on a signal from the sensor unit, corresponding to the sensing of a foreign object in a third detection area having a smaller distance from the machining tool than the second detection area. Preferably, the control and / or adjustment unit is configured to trigger multiple different actions, in particular in a cascade manner, according to multiple successive different signals from the sensor unit, corresponding to the movement of a foreign object through different detection zones. In particular, it is conceivable that the control and / or adjustment unit, according to multiple successive different signals from the sensor unit, cascades the output of warning signals, the shutdown of the motor driving the machining tool, and the mechanical braking of the machining tool, in response to the movement of a foreign object into a first detection zone, from the first detection zone to a second detection zone, and from the second detection zone to a third detection zone. Advantageously, false triggering and wear of the machining tool can be kept to a minimum. Low-wear machine tool devices can advantageously be provided.

[0031] Furthermore, it is proposed that the control and / or adjustment unit is configured to classify different foreign objects sensed by the sensor unit and trigger different actions according to different types. In particular, the control and / or adjustment unit is configured to distinguish different types of foreign objects based on different signals from the sensor unit. Specifically, different types of foreign objects have different electrical and / or magnetic properties, especially capacitive properties, which affect the electric and / or magnetic fields of at least one antenna in particular differently. In particular, each type of foreign object has its own electrical and / or magnetic markers, especially capacitive markers. Preferably, the control and / or adjustment unit is configured to identify the type of foreign object and classify it based on its electrical and / or magnetic markers, especially capacitive markers. Preferably, the electrical and / or magnetic markers, especially capacitive markers, of different types of foreign objects are stored in the memory unit of the control and / or adjustment unit. Specifically, the control and / or adjustment unit is configured to compare the signal from the sensor unit corresponding to the sensing of the foreign object with the stored markers and classify the foreign object based on the comparison.

[0032] In particular, the control and / or adjustment unit is configured to distinguish between living and inanimate foreign objects based on different signals from the sensor unit and classify the foreign objects accordingly. Preferably, the control and / or adjustment unit is configured to distinguish between living foreign objects (human and animal) based on different signals from the sensor unit and classify the foreign objects accordingly. Preferably, the control and / or adjustment unit is configured to distinguish between inanimate foreign objects of different materials based on different signals from the sensor unit and classify the foreign objects accordingly. Preferably, different actions to be triggered for different types of foreign objects are stored in the memory unit of the control and / or adjustment unit. In particular, the control and / or adjustment unit is configured to trigger an action to classify at least one foreign object belonging to the sensed foreign object. For example, it can be considered that the control and / or adjustment unit is configured to trigger the removal of the processing tool from the danger zone based on the sensed foreign object classified as an inanimate foreign object, and to trigger the mechanical braking of the processing tool based on the sensed foreign object classified as a living foreign object. Advantageously, it is possible to trigger foreign object-specific actions.

[0033] Furthermore, it is proposed that the machine tool assembly includes at least one mechanical braking unit configured to brake the machining tool, wherein a control and / or adjustment unit is configured to use at least one current from a motor braking device to operate the mechanical braking unit. Preferably, the mechanical braking unit is configured to mechanically brake a machining tool, particularly a moving, especially rotating, tool, particularly until the tool comes to a stop. Preferably, the mechanical braking unit is configured to actively brake the machining tool, particularly by means of force-locking and / or form-locking with the machining tool and / or a driven shaft on which the machining tool is supported. In particular, the mechanical braking unit includes at least one mechanical braking element, particularly a brake caliper, a ring spring, a blockier bolt, etc., which is capable of force-locking and / or form-locking with the machining tool and / or driven shaft to achieve active braking of the machining tool. Alternatively or additionally, the mechanical braking unit can be configured to passively brake the machining tool, particularly by decoupling the machining tool from the motor driving the machining tool. Preferably, the mechanical braking unit is configured to brake the machining tool until it comes to a stop no later than 200 milliseconds after the mechanical braking is triggered. Preferably, the mechanical braking unit is configured to brake the machining tool with such braking force that the machining tool slips at least temporarily relative to the driven shaft during braking, and moves faster than the driven shaft.

[0034] Preferably, the control and / or regulating unit is configured to perform motor braking, particularly to operate the motor driving the machining tool for braking. In particular, the control and / or regulating unit can be configured to perform motor braking of varying intensities according to different power consumptions of the motor. Specifically, the control and / or regulating unit is configured to shut down, short-circuit, reverse the polarity, etc., of the motor driving the machining tool, particularly an electric motor, to achieve motor braking. Especially during motor braking, at least one current, particularly a larger current than during normal motor operation, flows. Preferably, the control and / or regulating unit is configured to operate at least one triggering unit by means of at least one current for motor braking, particularly directing at least one current for motor braking to the triggering unit. In particular, the control and / or regulating unit or the mechanical braking unit includes a triggering unit. Preferably, the triggering unit is configured to release at least one mechanical braking element and / or at least one braking actuator of the mechanical braking unit. The triggering unit can particularly be constructed as shape memory metal, a relay, an electromagnet, a fuse, or other triggering unit that appears meaningful to those skilled in the art. In particular, at least one current applied to the motor braking can deform a trigger unit constructed of shape memory metal, switch a trigger unit constructed of a relay or electromagnet, and / or melt a trigger unit constructed of a fuse. Advantageously, this allows for efficient and safe mechanical braking of the machining tool.

[0035] Furthermore, it is proposed that the machine tool assembly includes at least one oscillating unit for oscillatingly supporting the machining tool, wherein the control and / or adjustment unit is configured to at least partially independently match at least one parameter, particularly at least one detection area, according to at least one oscillation angle of the machining tool. Preferably, the machine tool assembly includes the oscillating unit in lieu of or as an addition to the mechanical braking unit. In particular, machine tools configured as cross-cutting and / or miter saws include a machine tool assembly that includes an oscillating unit for oscillatingly supporting the machining tool. Preferably, the oscillating unit includes at least one oscillating arm on which the machining tool is supported, and the oscillating unit further includes at least one oscillating bearing, particularly a rotary hinge, configured to oscillately support the oscillating arm relative to the basic unit of the machine tool assembly, particularly about an oscillating axis. In particular, the oscillating unit may include at least one additional oscillating bearing, particularly a tilting hinge, configured to oscillately support the oscillating arm relative to the basic unit about another oscillating axis, particularly perpendicular to the oscillating axis. Preferably, the machine tool device includes at least one oscillation sensor unit configured to sense at least one oscillation angle of the machining tool, particularly the oscillating arm, relative to the base unit, particularly relative to the base surface of the base unit, and to provide it to the control and / or adjustment unit.

[0036] The sensor unit, particularly at least one antenna, is preferably arranged on the basic unit. Specifically, the distance between the at least one antenna and the machining tool is related to at least one swing angle of the machining tool. Preferably, the control and / or adjustment unit is configured to manipulate the sensor unit such that the minimum extension dimension of the detection area around the machining tool remains constant regardless of the at least one swing angle of the machining tool. Specifically, the control and / or adjustment unit is configured to match the detection area according to the at least one swing angle of the machining tool. Specifically, the control and / or adjustment unit is configured to increase the detection area according to the movement of the machining tool away from, particularly by, the movement of the at least one antenna. Specifically, the control and / or adjustment unit is configured to decrease the detection area according to the movement of the machining tool towards, particularly by, the movement of the at least one antenna. Advantageously, it is possible to achieve, in particular, operator-safe coverage of the detection area by the swingable supported machining tool.

[0037] Furthermore, it is proposed that the machine tool assembly includes at least one locking unit for locking the swing unit, wherein the control and / or adjustment unit is configured to operate the locking unit to lock the swing unit according to at least one signal from the sensor unit. Preferably, the locking unit is configured to prevent the swinging of the machining tool, especially the swing arm. In particular, the locking unit is configured to lock at least one swing bearing. In particular, the locking unit includes at least one locking element, such as a fixing bolt, locking pin, brake shoe, etc., configured to lock at least one swing bearing. In particular, the locking of the swing unit, especially at least one swing bearing, constitutes an action to be triggered by the control and / or adjustment unit according to at least one signal from the sensor unit, especially according to the sensing of a foreign object. In particular, the control and / or adjustment unit is configured to trigger the locking of the swing unit by operating the locking unit. In particular, the control and / or adjustment unit is configured to operate the locking unit, replacing or attached to the motor, output unit, emergency call unit, and / or mechanical braking unit of the machine tool assembly, according to at least one signal from the sensor unit. Alternatively, or as an addition to the locking unit, the machine tool assembly may have at least one emergency oscillation actuator, wherein the control and / or adjustment unit is configured to operate the emergency oscillation actuator according to at least one signal from the sensor unit in order to transport, in particular, the machining tool from a hazardous area by oscillation. Advantageously, this can prevent the machining tool from oscillating onto foreign objects and reduce the risk of injury.

[0038] Furthermore, it is proposed that the machine tool assembly includes at least one protective unit that at least partially surrounds at least one antenna and is configured to protect at least one antenna from environmental influences. Preferably, the at least one protective unit is configured to protect at least one antenna from mechanical influences, particularly impacts, vibrations, abrasion, etc. In particular, the at least one protective unit may be at least partially made of a material that at least partially absorbs impacts and / or is abrasion-resistant, such as rubber, silicone, etc. Preferably, the protective unit is made of an electrically insulating material. In particular, the impact protection element of the machine tool assembly may at least partially constitute at least one protective unit. In particular, at least one antenna may be at least partially integrated into the impact protection element of the machine tool assembly. Preferably, the at least one protective unit is configured to protect at least one antenna from environmental influences caused by weather and / or the environment, particularly moisture, frost, heat, etc. In particular, the at least one protective unit may be at least partially made of a material that is at least partially fluid-sealed, particularly waterproof, and / or temperature-insulating. Preferably, the at least one protective unit completely surrounds at least one antenna, particularly when viewed along any spatial orientation. Alternatively, it is conceivable that the at least one protective unit partially surrounds at least one antenna, for example, at least on the workpiece contact surface. Preferably, at least one protective unit is injection molded onto at least one antenna and / or at least one shielding unit of the machine tool assembly, particularly encapsulating it around at least one antenna and / or around at least one shielding unit. Alternatively, it may be considered that at least one antenna and / or at least one shielding unit is at least sectionally inserted, clamped, bonded, welded, brazed, or similarly mounted into at least one protective unit. Preferably, the machine tool assembly may have multiple protective units, particularly multiple protective units corresponding to the number of antennas. Alternatively or additionally, it may be conceivable that a single protective unit is configured for receiving, particularly at least partially surrounding multiple antennas. Advantageously, at least one antenna can be protected from environmental influences. Advantageously, a sensor unit with a low-wear antenna can be provided.

[0039] Furthermore, it is proposed that the machine tool device includes at least one, particularly at least one, of the aforementioned shielding unit, which at least partially surrounds at least one antenna and is configured to shield at least one electric and / or magnetic field defining at least one detection area of ​​the at least one antenna along at least one transmission direction. Preferably, the at least one shielding unit is made of a material impermeable to electromagnetic radiation, particularly to electric and / or magnetic fields, particularly metals, such as lead, iron, steel, etc. In particular, the at least one shielding unit is configured to absorb and / or reflect the electric and / or magnetic field of the at least one antenna along at least one transmission direction. Additionally, it is conceivable that the at least one shielding unit is configured to focus the electric and / or magnetic field of the at least one antenna along at least one unshielded transmission direction. Preferably, the at least one shielding unit partially surrounds at least one antenna. In particular, the at least one antenna is arranged unshielded when viewed along at least one transmission direction. In particular, at least one hazardous area of ​​the machining tool, such as the cutting edge of the machining tool, is arranged along at least one transmission direction (along which at least one antenna is arranged unshielded).

[0040] Furthermore, it is proposed that the sensor unit, particularly in at least one embodiment, includes at least one electrical or electronic shielding circuit configured to shield the electric and / or magnetic fields emitted by the antenna along at least one transmission direction. The shielding circuit enables the tuning of the antenna's transmission direction. The shielding circuit is preferably constructed as a high-impedance circuit. The shielding circuit preferably includes at least one high-resistance electrical structural element. In particular, the tuning circuit of the antenna and / or sensor unit is connected to the input of the shielding circuit. Preferably, at least one output of the shielding circuit is grounded. Preferably, the shielding circuit has a higher impedance at its input than at its output. For example, the impedance at the input of the shielding circuit is on the order of 100 MΩ, while the impedance at the output is on the order of 10 MΩ or less. This advantageously ensures that the field lines of the electric and / or magnetic fields are emitted at least substantially along the antenna's transmission direction. However, it is also possible, in principle, for the order of magnitude at the input and output to differ from the aforementioned values. Advantageously, the orientation of the electric and / or magnetic fields of at least one antenna can be achieved. Advantageously, the electric and / or magnetic fields can be directed towards a desired area where foreign objects should be sensed. Advantageously, the orientation of electric and / or magnetic fields can be matched particularly easily.

[0041] In particular, at least one shielding unit may at least partially surround at least one protective unit, and / or at least one protective unit may at least partially surround at least one shielding unit. In particular, at least one protective unit may at least partially integrate into at least one shielding unit, and / or at least one shielding unit may at least partially integrate into at least one protective unit. Preferably, at least one protective unit and at least one shielding unit may be constructed as a single piece. "Single piece" should be understood in particular as formed as a single block. Preferably, the block is manufactured from a single blank, a blank, and / or a casting, particularly preferably by injection molding, especially single-component and / or multi-component injection molding. In particular, machine tool devices may have at least one combined protective and shielding unit. Preferably, at least one shielding unit is at least partially cast onto at least one antenna and / or at least one protective unit, particularly around at least one antenna and / or around at least one protective unit. Alternatively, it may be considered that at least one antenna and / or at least one protective unit is at least partially inserted, clamped, bonded, welded, brazed, or similarly mounted into at least one shielding unit. Preferably, the machine tool assembly may have multiple shielding units, particularly multiple shielding units corresponding to the number of antennas. Alternatively or additionally, it is conceivable that a single shielding unit is configured for receiving, particularly at least partially surrounding multiple antennas. Advantageously, the orientation of the electric and / or magnetic field of at least one antenna can be achieved. Preferably, at least one shielding unit is constructed at least partially from the table, base plate, slide plate, or the like of the machine tool assembly. Advantageously, false triggering can be reduced and operational comfort improved.

[0042] Furthermore, it is proposed that the machine tool assembly includes at least one workpiece contact surface, wherein the sensor unit includes at least one additional antenna having at least one transmission direction opposite to said at least one antenna and a transmission direction extending transversely to, and particularly perpendicular to, the workpiece contact surface. In particular, the workpiece contact surface may be included in the table, base plate, slide, or other components of the machine tool assembly that appear meaningful to those skilled in the art. In particular, at least two antennas are arranged on opposite sides of the component. Preferably, at least one antenna is arranged on the workpiece contact surface, and at least one additional antenna is arranged on another surface of the machine tool assembly opposite to the workpiece contact surface. In particular, the workpiece contact surface and said additional surface extend parallel to each other. In particular, at least one antenna and at least one additional antenna extend parallel to each other. "Parallel" should be understood in particular as an orientation of a direction relative to a reference direction, particularly in a plane, wherein the direction has a deviation of particularly less than 8°, advantageously less than 5°, and particularly advantageously less than 2° relative to the reference direction. The expression “antiparallel” should be defined in particular as an orientation of a direction relative to a parametric direction, wherein the direction and the reference direction, especially when viewed in a projection plane, form an angle of 180°, and the angle has a maximum deviation of particularly less than 8°, advantageously less than 5° and particularly advantageously less than 2°.

[0043] Preferably, at least one antenna has multiple transmission directions, each extending laterally to one transmission direction of at least one other antenna. In particular, at least one transmission direction of at least one antenna, preferably each transmission direction, points away from at least one other antenna. In particular, at least one shielding unit shields the electric and / or magnetic fields of at least one antenna at least along the direction pointing towards at least one other antenna. In particular, at least one transmission direction of at least one other antenna, preferably each transmission direction, points away from at least one antenna. In particular, at least one additional shielding unit of the machine tool device shields the electric and / or magnetic fields of at least one other antenna along the direction pointing towards at least one antenna. Preferably, the machining tool, in at least one operating state, extends at least sectionally through the workpiece contact surface and / or through said additional surface, particularly through a member having the workpiece contact surface and said additional surface. Preferably, the detection area defined by the electric and / or magnetic fields of at least one antenna covers the hazardous area of ​​the machining tool arranged on the workpiece contact surface side, especially the cutting edge, and the detection area defined by the electric and / or magnetic fields of at least one other antenna covers the hazardous area of ​​the machining tool arranged on said additional surface side, especially the cutting edge. Advantageously, machine tool devices with full sensing coverage of the workpiece contact surface and the machining tool can be provided.

[0044] Furthermore, it is proposed that at least one antenna has a non-linear trajectory and surrounds the machining tool along at least two sides when viewed from at least one plane. Preferably, at least one antenna surrounds the machining tool along at least two sides when viewed from at least one plane parallel to the workpiece contact surface, particularly in the workpiece contact surface. In particular, at least one antenna surrounds the machining tool along at least two sides, preferably along at least three sides, and particularly preferably along four sides when viewed from at least one plane. In particular, the machining tool has two dangerous sides when viewed from at least one plane, particularly the cutting edge side, and has two blade sides. Preferably, at least one antenna surrounds the machining tool along at least one dangerous side and along at least one blade side when viewed from at least one plane. Preferably, at least one antenna at least segmentally depicts at least one curve, at least one turn, at least one angle, or at least one non-linear shape that appears meaningful to those skilled in the art. In particular, at least one antenna has an L-shaped trajectory, particularly two sub-segments arranged laterally and particularly perpendicularly to each other, a U-shaped trajectory, particularly two sub-segments arranged parallel to each other (which are interconnected by a third sub-segment arranged laterally and particularly perpendicular to these two sub-segments), or other non-linear trajectories that appear meaningful to those skilled in the art when viewed from at least one plane. Preferably, the sensor unit may have multiple antennas, particularly two antennas, which observe the surrounding of the machining tool in at least one plane, particularly along at least two different sides. Advantageously, sensing coverage of the machining tool can be achieved on different sides, thus achieving high operator safety.

[0045] Furthermore, it is proposed that the machine tool assembly includes at least one protective cover for the machining tool, wherein the sensor unit includes at least one additional antenna arranged at at least one other end of the protective cover opposite to the end of the protective cover where the at least one antenna is arranged. The protective cover is preferably configured to at least partially cover the machining tool, particularly the cutting edge of the machining tool. Preferably, the protective cover has a partially disc-shaped, particularly semi-disc-shaped, cross-section when viewed parallel to the driven axis (on which the machining tool is supported). In particular, the protective cover is pivotally supported on and / or about the driven axis. In particular, the machining tool has different danger zones, particularly different exposed sections of the cutting edge, depending on the different swing angles of the protective cover. In particular, the danger zone of the machining tool, particularly the exposed cutting edge, can extend from one end of the protective cover along the cutting edge to the other end of the protective cover. In particular, the danger zone of the machining tool constitutes the unprotected area of ​​the machining tool. Preferably, the detection areas of at least two antennas, particularly at least two antennas, move proportionally with the swing of the protective cover, particularly with the swing angle of the protective cover. Advantageously, optimized sensing coverage of the machining tool, especially at least one hazardous area of ​​the machining tool, can be achieved at any angular position of the protective cover. Advantageously, machine tool devices with protective covers can provide operator safety and comfort.

[0046] Furthermore, the present invention is based on a method for operating a machine tool, particularly a machine tool according to the present invention.

[0047] It is proposed that, in at least one method step, at least one electric field and / or magnetic field is emitted by at least one, particularly at least one, of the aforementioned antennas, defining at least one detection area around at least one, particularly the aforementioned machining tool, of the machine tool apparatus; and / or at least one foreign object is sensed by at least one antenna based on at least one change in at least one electric field and / or magnetic field.

[0048] Preferably, in at least one method step, at least one operating parameter is matched at least partially independently by a control and / or regulation unit. Advantageously, a method can be provided by which operator-safe, operator-comfortable, and maintenance-reduced operation of the machine tool can be achieved.

[0049] Furthermore, the present invention is based on a machine tool having at least one machine tool device according to the invention. Advantageously, a low-wear machine tool can be provided, which allows for safe and comfortable operation by the operator.

[0050] Furthermore, the present invention is based on a system having at least one machine tool according to the invention and at least one display device configured to display at least one danger zone surrounding at least one of the machine tool, particularly at least one of the aforementioned machine tool devices, particularly at least one of the aforementioned machining tools.

[0051] It is proposed that the display device is configured to match the display of at least one hazardous area according to changes in at least one parameter, particularly according to changes in at least one detection area surrounding the machining tool. The display device can be arranged on or separately from the machine tool. Preferably, the display device is configured as a visual display device, particularly configured to visually display hazardous areas. In particular, the display device has at least one illumination element, such as a light-emitting diode, laser diode, etc., and / or has a display element, such as a display screen for displaying hazardous areas. In particular, the display device can be configured as a projector, smartphone, augmented reality glasses, or other display device that appears meaningful to those skilled in the art. In particular, the display device is configured to project, illuminate, or similarly display hazardous areas, particularly the boundaries of hazardous areas surrounding the machining tool, in the work area, and / or sequentially appear in the image of the machine tool, particularly in a real-time image, for example, displaying hazardous areas, particularly the boundaries of hazardous areas, in signal colors. In particular, the display device can have at least one camera for recording images of the machine tool, particularly real-time images.

[0052] Preferably, the change in the hazardous area, especially the boundary of the hazardous area, is proportional to the change in the detection area, especially the boundary of the detection area. In particular, the control and / or adjustment unit is configured to increase the detection area based on an increase in the hazardous area, for example, based on an increase in the machining tool rotation speed, and the display device is configured to display the increased hazardous area. In particular, the control and / or adjustment unit is configured to decrease the detection area based on a decrease in the hazardous area, for example, based on a decrease in the machining tool rotation speed, and the display device is configured to display the decreased hazardous area. Preferably, the hazardous area, especially the boundary of the hazardous area, can correspond to the detection area, especially the boundary of the detection area. Preferably, the control and / or adjustment unit is connected to the display device in signal transmission technology, especially for providing at least one piece of information regarding a change in at least one parameter. In particular, the control and / or adjustment unit can be connected to the display device, especially at least one communication unit of the display device, in signal transmission technology via the communication unit of the machine tool, especially wirelessly. Advantageously, a system can be provided for operator comfort and safety in visualizing hazardous areas.

[0053] The machine tool apparatus, machine tool, system, and / or method according to the invention are not intended to be limited to the applications and embodiments described above. In particular, the machine tool apparatus, machine tool, system, and / or method according to the invention may have a different number of individual elements, components, units, and method steps than those described herein in order to fulfill the functions described herein. Furthermore, values ​​within the extreme values ​​given in this disclosure should also be considered publicly available and freely usable. Attached Figure Description

[0054] Further advantages are illustrated in the following figures. Five embodiments of the invention are shown in the figures. The figures, description, and claims contain multiple combinations of features. Those skilled in the art will also consider each feature individually and summarize them into other meaningful combinations.

[0055] The attached diagram shows:

[0056] Figure 1 A schematic perspective view of a system according to the invention, having a machine tool and a display device according to the invention;

[0057] Figure 2 Figure 1 A schematic perspective view of a machine tool according to the present invention;

[0058] Figure 3 Figure 1 Another schematic perspective view of the machine tool according to the present invention;

[0059] Figure 4 Figure 1 Detailed illustration of a portion of a machine tool according to the present invention;

[0060] Figure 5a Figure 1 A schematic cross-sectional view of the protection unit of the machine tool device according to the invention;

[0061] Figure 5b A schematic cross-sectional view of a first alternative protection unit for a machine tool device according to the present invention;

[0062] Figure 5c A schematic cross-sectional view of a second alternative protection unit for a machine tool device according to the present invention;

[0063] Figure 5d A schematic cross-sectional view of a third alternative protection unit for a machine tool device according to the present invention;

[0064] Figure 5eA schematic cross-sectional view of a fourth alternative protection unit for a machine tool device according to the present invention;

[0065] Figure 5f A schematic cross-sectional view of the fifth alternative protection unit of the machine tool device according to the present invention;

[0066] Figure 6 A schematic cross-sectional view of the slide plate of the machine tool device according to the present invention;

[0067] Figure 7a Figure 1 A schematic top view of a machine tool according to the present invention;

[0068] Figure 7b With a first alternative sensor unit Figure 1 A schematic top view of a machine tool according to the present invention;

[0069] Figure 7c With a second alternative sensor unit Figure 1 A schematic top view of a machine tool according to the present invention;

[0070] Figure 7d With a third alternative sensor unit Figure 1 A schematic top view of a machine tool according to the present invention;

[0071] Figure 8 A schematic perspective view of a first alternative machine tool according to the invention;

[0072] Figure 9 The first alternative is a circuit assembly of a portion of the sensor unit of the machine tool device according to the invention;

[0073] Figure 10 A schematic perspective view of a second alternative machine tool according to the invention;

[0074] Figure 11 A schematic perspective view of a third alternative machine tool according to the invention; and

[0075] Figure 12 A schematic perspective view of a fourth alternative machine tool according to the invention. Detailed Implementation

[0076] Figure 1A schematic perspective view of a system 92a having at least one machine tool 90a and at least one display device 94a is shown. The machine tool 90a preferably includes at least one machine tool assembly 10a. The machine tool assembly 10a preferably includes at least one motor-driven machining tool 12a; at least one, particularly capacitive, sensor unit 14a configured to sense at least one foreign object 16a, 18a in at least one detection area 20a, 22a, 24a surrounding the machining tool 12a; and at least one control and / or adjustment unit 26a configured to trigger at least one action based on at least one signal from the sensor unit 14a. The display device 94a is particularly configured to display at least one danger zone 96a surrounding at least one, particularly at least one of the aforementioned machine tool assemblies 10a, and particularly the aforementioned machining tool 12a. In particular, the machine tool 90a including the machine tool assembly 10a is constructed as a handheld machine tool. In particular, the machine tool 90a is constructed as a circular saw, particularly a handheld circular saw. In particular, the machining tool 12a is constructed as a saw blade, particularly a circular saw blade.

[0077] Preferably, the display device 94a is configured to match the display of at least one danger zone 96a according to changes in at least one parameter, particularly according to changes in at least one detection area 20a, 22a, 24a surrounding the machining tool 12a. In this embodiment, the sensor unit 14a exemplarily has three detection areas 20a, 22a, 24a. For clarity, in Figure 1Only one detection area 20a is shown and described below. However, this description should also be similarly applied to the other detection areas 22a, 24a. The display device 94a can be arranged on the machine tool 90a or constructed separately from the machine tool 90a as exemplarily in this embodiment. Preferably, the display device 94a is constructed as a visual display device, particularly configured to visually display the danger area 96a. In particular, the display device 94a has at least one illumination element, such as a light-emitting diode, laser diode, etc., and / or a display element 98a, such as a display screen for displaying the danger area 96a. In this embodiment, the display device 94a, for example, has a display element 98a constructed as a display screen for displaying the danger area 96a. In particular, the display device 94a can be constructed as a projector, a smartphone, augmented reality glasses, or other display device that would be meaningful to someone skilled in the art. In this embodiment, the display device 94a is constructed, for example, as augmented reality glasses. In particular, the operator 42a operating the machine tool 90a wears the display device 94a in front of their eyes. In particular, the display device 94a is configured to project, illuminate, etc., the hazardous area 96a, especially at least the boundary of the hazardous area 96a surrounding the machining tool 12a, within the working area 100a; and / or, for example in this embodiment, to sequentially appear in the image 102a of the machine tool 90a, especially in a real-time image, for example, to display the hazardous area 96a, especially at least the boundary of the hazardous area 96a, in signal colors. In particular, the display device 94a may have at least one camera (not shown further here) for recording images of the machine tool 90a, especially real-time images.

[0078] Figure 2 Show Figure 1 A schematic perspective view of machine tool 90a. Especially in Figure 2 The image 102a, particularly a real-time image, of a machine tool 90a having a danger zone 96a presented by a display device 94a is shown. Preferably, the change in the boundary of the danger zone 96a, particularly the danger zone 96a, is proportional to the change in the boundary of the detection zone 20a, particularly the detection zone 20a. In particular, the control and / or adjustment unit 26a is configured to increase the detection zone 20a according to the increase of the danger zone 96a, for example based on the increase of the rotational speed of the machining tool 12a, and the display device 94a is configured to display the increased danger zone 96a'. Figure 2For example, a danger zone 96a and an enlarged danger zone 96a' are shown. In particular, the control and / or adjustment unit 26a is configured to reduce the detection zone 20a based on the reduction of the danger zone 96a, for example, based on a reduction in the revolutions of the machining tool 12a, and the display device 94a is configured to display the reduced danger zone. Preferably, for example in this embodiment, the boundary of the danger zone 96a, especially the boundary of the danger zone 96a, may correspond to the boundary of the detection zone 20a, especially the boundary of the detection zone 20a. Preferably, the control and / or adjustment unit 26a is connected to the display device 94a in signal transmission technology, especially for providing at least one piece of information regarding a change in at least one parameter. In particular, the control and / or adjustment unit 26a can be connected to the display device 94a, especially at least one communication unit 104a of the display device 94a, particularly wirelessly via the communication unit 44a of the machine tool device 10a (see [link to documentation]). Figure 1 and 3 ).

[0079] Figure 3 Show Figure 1 Another schematic perspective view of the machine tool 90a. Preferably, the sensor unit 14a includes at least one antenna 28a, 30a, configured to emit at least one electric field and / or magnetic field defining at least one detection area 20a; and / or to sense at least one foreign object 16a, 18a based on at least one change in the at least one electric field and / or magnetic field. In particular, the sensor unit 14a may have multiple antennas 28a, 30a, especially for achieving complete coverage of the machining tool 12a together with the detection area 20a. In particular, the sensor unit 14a may have at least two antennas 28a, 30a, preferably at least four antennas 28a, 30a, particularly preferably at least six antennas 28a, 30a, and particularly, especially preferably at least eight antennas 28a, 30a. In this embodiment, the sensor unit 14a has, for example, two antennas 28a, 30a.

[0080] Preferably, the machine tool device 10a is configured as a handheld machine tool device. Preferably, the machine tool device 10a is configured as an electrically operated machine tool device. In particular, the machine tool 90a is configured as a power machine tool. Specifically, the machining tool 12a can be driven by at least one electric motor of the machine tool device 10a. Preferably, the machine tool device 10a includes at least one electrical storage unit 106a, particularly a battery, for powering at least one electric motor. Alternatively, the machine tool device 10a can be configured as a pneumatically operated machine tool device, a gasoline-powered machine tool device, etc. Preferably, the machine tool device 10a is configured for cutting and / or sawing workpiece 108a.

[0081] Sensor unit 14a is preferably configured as an electrical and / or magnetic sensor unit, particularly a capacitive sensor unit. In particular, sensor unit 14a is configured as a sensor unit different from visual, auditory, tactile sensor units, etc. In particular, sensor unit 14a is configured for proximity detection. Preferably, sensor unit 14a is configured to sense foreign objects 16a, 18a before contact with the processing tool 12a. Figure 3 For example, two foreign objects 16a and 18a are shown, which can be detected by sensor unit 14a. Specifically, sensor unit 14a is configured to detect foreign objects 16a and 18a at at least a defined distance from the machining tool 12a, particularly within a detection area 20a surrounding the machining tool 12a. Detection area 20a is specifically the area extending around the machining tool 12a, in which sensor unit 14a is forcibly and configured to detect foreign objects 16a and 18a. Preferably, detection area 20a extends asymmetrically around the machining tool 12a (see [reference]). Figure 2 Preferably, the detection area 20a extends around the portion of the machining tool 12a that is dangerous to the operator 42a of the machine tool 10a, particularly along the cutting edge of the machining tool 12a, compared to other parts of the machining tool 12a. Alternatively, the detection area 20a may extend symmetrically, particularly spherically, around the machining tool 12a.

[0082] Foreign objects 16a and 18a can constitute living objects, particularly body parts of the operator 42a, such as hands 110a, fingers, legs, etc., constituting animals or other living objects that appear meaningful to those skilled in the art. Foreign objects 16a and 18a can also constitute inanimate objects, particularly interfering objects disposed on and / or extending into the vicinity of the workpiece 108a, such as nails 112a, electrical wires, water pipes, etc. In this embodiment, foreign object 16a constitutes, for example, a living object, particularly the hand 110a of the operator 42a, while the other foreign object 18a constitutes, for example, an inanimate object, particularly the nail 112a disposed on the workpiece 108a.

[0083] Preferably, the control and / or adjustment unit 26a is connected to the sensor unit 14a, particularly via at least one signal line (not shown), in terms of signal transmission technology. Alternatively or additionally, the control and / or adjustment unit 26a may be connected to the sensor unit 14a via a wireless signal connection in terms of signal transmission technology. Preferably, the control and / or adjustment unit 26a is configured to manipulate the sensor unit 14a. The sensor unit 14a is particularly configured to provide the control and / or adjustment unit 26a with at least one signal, preferably multiple signals, particularly based on the sensing of at least one foreign object 16a, 18a in the detection area 20a. Preferably, the control and / or adjustment unit 26a is configured to analyze and process at least one signal received by the sensor unit 14a. In particular, the control and / or adjustment unit 26a is configured to trigger at least one action based on the analysis and processing of at least one signal from the sensor unit 14a.

[0084] At least one action preferably constitutes a safety function, particularly for preventing or at least reducing injury to the operator 42a, and / or constitutes a comfort function, particularly for making the operation of the machine tool 10a easier for the operator 42a. At least one action may in particular constitute braking of the machining tool 12a, removal of the machining tool 12a from the danger zone 96a, shielding of the machining tool 12a, output of at least one visual, auditory, and / or tactile warning message, dialing of an emergency telephone, or other action that appears meaningful to a person skilled in the art. In particular, the control and / or adjustment unit 26a may be configured to trigger multiple, particularly different, actions. Preferably, the control and / or adjustment unit 26a may be configured to trigger different actions based on different signals from the sensor unit 14a. In particular, the control and / or adjustment unit 26a is configured to operate at least one response unit 114a of the machine tool 10a based on at least one signal from the sensor unit 14a, particularly for triggering at least one action, the response unit 114a being configured to perform at least one action. At least one reaction unit 114a may be configured as a braking unit 54a, a covering unit, a swinging unit, a locking unit, an output unit 116a, a communication unit 44a, or other units that appear meaningful to those skilled in the art.

[0085] Antennas 28a and 30a are preferably configured to guide current. In particular, antennas 28a and 30a are constructed in a cylindrical shape, especially a cylindrical shape. Specifically, antennas 28a and 30a are configured to transmit an electric field radially distributed about the longitudinal axis 118a of antennas 28a and 30a and / or a magnetic field concentrically distributed about the longitudinal axis 118a of antennas 28a and 30a (see [link to relevant documentation]). Figure 5aPreferably, antennas 28a and 30a are constructed as cables, particularly coaxial cables, metal wires, etc. Alternatively or additionally, it may be considered that the machining tool 12a and / or the driven shaft 120a (on which the machining tool 12a is supported) constitute at least one antenna, and / or antennas 28a and 30a are configured for electrical coupling with the machining tool 12a and / or the driven shaft 120a. Preferably, the machining tool 12a is constructed as an antenna, wherein the sensor unit 14a has at least one other antenna 28a or 30a, which is constructed separately from the machining tool 12a. In this embodiment, the sensor unit 14a has, for example, two antennas 28a and 30a, which are constructed separately from the machining tool 12a, particularly as coaxial cables. Alternatively or additionally, it may be conceivable that at least one of the antennas 28a and 30a is constructed separately from the machine tool device 10a, particularly arranged on the operator 42a, for example on gloves or goggles of the operator 42a.

[0086] In particular, antennas 28a and 30a are configured to transmit electromagnetic fields. Specifically, the electric and / or magnetic fields, especially the electromagnetic fields, of antennas 28a and 30a, and particularly the field strength and / or maximum extension of the electric and / or magnetic fields, are related to the voltage present on antennas 28a and 30a and / or the current flowing through antennas 28a and 30a. Specifically, the detection region 20a has at least substantially the same shape as the electric and especially electromagnetic fields of antennas 28a and 30a. Preferably, antennas 28a and 30a are arranged in a region 122a adjacent to the machining tool 12a.

[0087] Preferably, antennas 28a and 30a are configured to sense foreign objects 16a and 18a based on changes in the electric and / or magnetic fields emitted by antennas 28a and 30a. Alternatively or additionally, antennas 28a and 30a may be configured to sense foreign objects based on changes in the electric and / or magnetic fields emitted by other antennas, particularly other antennas. In particular, the first antenna 28a may be configured to emit electric and / or magnetic fields, while the second antenna 30a may be configured to sense foreign objects 16a and 18a based on changes in the electric and / or magnetic fields of the first antenna 28a. In particular, foreign objects 16a and 18a arranged in the detection area 20a change the characteristic parameters of their electric and / or magnetic fields, especially the electric and / or magnetic fields, based on the characteristics of their electric and / or magnetic fields. Preferably, antennas 28a and 30a are configured to sense foreign objects 16a and 18a capacitively, particularly based on changes in the capacitance of the electric and / or magnetic fields caused by the foreign objects 16a and 18a. Alternatively or additionally, antennas 28a and 30a may be configured for inductive sensing of foreign objects 16a and 18a, particularly based on changes in the inductance of the electric and / or magnetic fields induced by the foreign objects 16a and 18a. Preferably, antennas 28a and 30a are configured for sensing the distance between the foreign objects 16a and 18a and the processing tool 12a, particularly the position of the foreign objects 16a and 18a at least relative to the processing tool 12a, the velocity of the foreign objects 16a and 18a, particularly their approach velocity to the processing tool 12a, and / or the acceleration of the foreign objects 16a and 18a, particularly their approach acceleration to the processing tool 12a.

[0088] Preferably, the sensor unit 14a includes a tuning circuit connected to antennas 28a and 30a (not shown further, see [link]). Figure 9 (196b). It is conceivable that antennas 28a and 30a are each equipped with a tuning circuit. This tuning circuit is particularly configured to generate an electric and / or magnetic field through its interaction with at least one of antennas 28a and 30a. The tuning circuit preferably consists of at least one oscillating circuit, particularly an RLC oscillating circuit, and a phase stabilizing circuit. Preferably, the operating frequency of the tuning circuit is less than 5 MHz. However, alternatively, the operating frequency of the tuning circuit may be greater than 5 MHz. The tuning circuit particularly has at least one amplifier, which is, for example, composed of a field-effect transistor, a bipolar transistor, a power amplifier, etc. Furthermore, different amplifier topologies can be considered, such as scalable topologies, two-stage amplifier topologies, cascaded topologies, etc. The tuning circuit is preferably connected to a signal preparation unit, particularly an analog-to-digital converter, wherein the signal preparation unit may be connected to at least the control and / or adjustment unit 26a for signal transmission. The signal preparation unit preferably includes at least one comparator, particularly a Schmitt trigger, which is capable of converting the analog signal of at least one of the preferred antennas 28a and 30a into a digital signal.

[0089] Preferably, the control and / or adjustment unit 26a is configured to match at least one parameter at least partially independently based on at least one operating parameter. The at least one operating parameter may in particular constitute a motion parameter, such as the movement speed of the machine tool assembly 10a; an orientation parameter, such as the spatial orientation of the machine tool assembly 10a; a machining parameter, such as the insertion depth of the machining tool 12a; an operator-specific parameter, such as the skin conductivity of the operator 42a; or other parameters that appear meaningful to those skilled in the art. The at least one parameter to be matched may in particular constitute the sensitivity of the sensor unit 14a, the detection area 20a, especially the extension scale of the detection area 20a, the shape of the detection area 20a, etc.; constitute the type of at least one action to be triggered, the sequence of multiple actions to be triggered, the triggering speed and / or execution speed of at least one action, such as the braking speed of the machining tool 12a, or other parameters that appear meaningful to those skilled in the art.

[0090] Preferably, the control and / or adjustment unit 26a is configured to analyze and process at least one operating parameter. Preferably, the control and / or adjustment unit 26a is configured to match at least one parameter at least partially independently based on the analysis and processing of the at least one operating parameter. Preferably, the control and / or adjustment unit 26a is configured to match at least one parameter completely independently, particularly automatically, for example, based on a comparison of at least one operating parameter with a control routine stored in a memory unit of the control and / or adjustment unit 26a. Alternatively, it is conceivable that the control and / or adjustment unit 26a is configured to match at least one parameter partially independently. In particular, the control and / or adjustment unit 26a may be configured to provide the operator 42a with at least one suggestion for matching at least one parameter (e.g., via the output unit 116a of the machine tool device 10a) based on at least one operating parameter, particularly based on the analysis and processing of the at least one operating parameter, and to match at least one parameter based on operator input. In this embodiment, the machine tool device 10a has, for example, an auditory output unit 116a configured as a speaker. The output unit 116a may also alternatively or additionally be configured as a visual and / or tactile output unit. Preferably, the control and / or adjustment unit 26a is configured to match at least one parameter, particularly multiple parameters, at least partially independently based on multiple operating parameters. Preferably, the control and / or adjustment unit 26a may be configured to match multiple parameters at least partially independently based on at least one operating parameter.

[0091] Preferably, the control and / or adjustment unit 26a is configured to calibrate the sensor unit 14a at least partially independently based on at least one operating parameter, particularly matching at least one detection area 20a. Specifically, the control and / or adjustment unit 26a is configured to perform calibration of the sensor unit 14a at least partially independently as part of the access process of the machine tool assembly 10a and / or based on operator input. Preferably, the control and / or adjustment unit 26a is configured to calibrate the sensor unit 14a, particularly matching the detection area 20a, completely independently and particularly automatically based on at least one operating parameter, particularly based on the analysis of at least one operating parameter. Alternatively, the control and / or adjustment unit 26a may be configured to calibrate the sensor unit 14a partially independently. In particular, the control and / or adjustment unit 26a may be configured to provide the operator 42a with at least one suggestion for calibrating the sensor unit 14a (e.g., via the output unit 116a of the machine tool assembly 10a) based on at least one operating parameter, particularly based on the analysis of at least one operating parameter, and to calibrate the sensor unit 14a based on operator input.

[0092] In particular, the control and / or adjustment unit 26a is configured to at least partially independently match the detection area 20a of the sensor unit 14a, and in particular the extended scale and / or shape of the detection area 20a, according to at least one operating parameter, and in particular according to the analysis of at least one operating parameter, for the purpose of calibrating the sensor unit 14a. Alternatively or additionally, the control and / or adjustment unit 26a may be configured to at least partially independently match the sensitivity of the sensor unit 14a, the responsiveness of the sensor unit 14a to determined foreign objects 16a, 18a, and in particular to determined materials, or other parameters of the sensor unit 14a that appear meaningful to those skilled in the art, according to at least one operating parameter, and in particular according to the analysis of at least one operating parameter, for the purpose of calibrating the sensor unit 14a. For example, it may be considered that the sensor unit 14a is configured to sense the surrounding environment of the machine tool 10a, particularly during the contact process of the machine tool 10a, wherein the control and / or adjustment unit 26a is configured to calibrate the sensor unit 14a according to the sensed surrounding environment. For example, it can be considered that the sensor unit 14a senses the body part of the operator 42a in the adjacent area 122a of the machining tool 12a, which is arranged there to guide the machine tool 90a, wherein the control and / or adjustment unit 26a reduces the detection area 20a and / or reduces the sensitivity of the sensor unit 14a, especially in order to reduce false triggering caused by the body part in the adjacent area 122a of the machining tool 12a.

[0093] Preferably, at least one operating parameter constitutes a motion parameter and / or an orientation parameter. The at least one operating parameter constituting a motion parameter may in particular constitute the motion speed of the machine tool assembly 10a, the motion acceleration of the machine tool assembly 10a, the motion direction of the machine tool assembly 10a, or other motion parameters that appear meaningful to those skilled in the art. The at least one operating parameter constituting an orientation parameter may in particular constitute the spatial orientation of the machine tool assembly 10a, particularly its orientation relative to the workpiece 108a, relative to the vertical axis of the machine tool assembly 10a, relative to the longitudinal axis of the machine tool assembly 10a, and / or relative to the transverse axis of the machine tool assembly 10a. For example, it is conceivable that the control and / or adjustment unit 26a is configured to trigger braking as an action more quickly as possible based on the sensed motion speed of the machine tool assembly 10a. For example, it is conceivable that the control and / or adjustment unit 26a is configured to trigger braking as an action as quickly as possible based on the sensed free fall of the machine tool assembly 10a.

[0094] Preferably, at least one operating parameter constitutes the processing parameters. This at least one operating parameter constituting the processing parameters may in particular constitute the insertion depth of the processing tool 12a in the workpiece 108a, the inertial characteristic parameters of the processing tool 12a, workpiece characteristics, especially workpiece hardness, workpiece thickness, workpiece material, workpiece moisture content, the impact of the machine tool assembly 10a, the power consumption and / or rotational speed of the motor 124a driving the processing tool 12a, the rotational speed of the processing tool 12a, or other processing parameters that appear meaningful to those skilled in the art. For example, it may be considered that the control and / or adjustment unit 26a is configured such that the detection area 20a is adjusted to be larger the deeper the sensed insertion depth of the processing tool 12a.

[0095] Preferably, at least one operating parameter constitutes an operator-specific parameter. This operator-specific parameter may in particular constitute the skin conductivity of operator 42a, operator-specific working mode, especially operator-specific work movements, operator-specific operation of machine tool device 10a, operator's experience level, or other operator-specific parameters that appear meaningful to those skilled in the art. For example, it may be considered that the control and / or adjustment unit 26a is configured such that the greater the experience level of operator 42a, the lower the sensitivity of sensor unit 14a should be.

[0096] Preferably, the machine tool apparatus 10a includes at least one additional sensor unit 38a configured to sense at least one operating parameter. Preferably, the additional sensor unit 38a includes at least one sensor element 40a, 126a, 128a, 130a for sensing at least one operating parameter. In particular, the sensor unit 38a may include a plurality of particularly different sensor elements 40a, 126a, 128a, 130a, particularly corresponding to different numbers of operating parameters to be sensed. In this embodiment, the additional sensor unit 38a includes, for example, four different sensor elements 40a, 126a, 128a, and 130a. The first sensor element 40a is configured, for example, to sense operating parameters that constitute operator-specific parameters; the second sensor element 126a is configured, for example, to sense operating parameters that constitute motion parameters; the third sensor element 128a is configured, for example, to sense operating parameters that constitute orientation parameters; and the fourth sensor element 130a is configured, for example, to sense operating parameters that constitute processing parameters. Preferably, the additional sensor unit 38a is configured to provide at least one sensed operating parameter to the control and / or adjustment unit 26a, particularly in the form of at least one electrical signal. Alternatively or additionally, the sensor unit 14a, and particularly the antennas 28a and 30a of the sensor unit 14a, may be configured to sense at least determined operating parameters. In particular, the additional sensor unit 38a has a second sensor element 126a configured as an acceleration sensor for sensing at least one operating parameter that constitutes a motion parameter. In particular, the additional sensor unit 38a has a third sensor element 128a configured as a position sensor, especially a gyroscope, for sensing at least one operating parameter constituting an orientation parameter. In particular, the additional sensor unit 38a may have at least one sensor element 130a configured as an optical sensor, humidity sensor, acceleration sensor, inertial sensor, temperature sensor, current and / or voltage sensor, rotational speed sensor, etc., for sensing at least one operating parameter constituting a processing parameter. In this embodiment, the additional sensor unit 38a has a fourth sensor element 130a configured as a rotational speed sensor for sensing at least one operating parameter constituting a processing parameter. In particular, the additional sensor unit 38a may have at least one sensor element 40a configured as a conductivity sensor, fingerprint scanner, face scanner, etc., for sensing at least one operating parameter constituting an operator-specific parameter. In this embodiment, the additional sensor unit 38a has a first sensor element 40a configured as a conductivity sensor for sensing at least one operating parameter constituting an operator-specific parameter.

[0097] Preferably, the additional sensor unit 38a, and in particular the sensor elements 40a, 126a, 128a, and 130a of the additional sensor unit 38a, are arranged on and / or within the housing unit 132a of the machine tool assembly 10a. Alternatively or additionally, it is conceivable that the additional sensor unit 38a is arranged separately from the housing unit 132a of the machine tool assembly 10a and, in particular, has at least one, particularly wireless, communication unit for transmitting at least one sensed operating parameter to the control and / or adjustment unit 26a. Preferably, the additional sensor unit 38a is configured to sense at least one operating parameter, particularly continuously and / or during the operation of the machine tool assembly 10a and during the engagement process of the machine tool assembly 10a. For example, it is conceivable that the additional sensor unit 38a is configured to sense operating parameters constituting the inertia of the machining tool 12a during the increase of the rotational speed of the machining tool 12a to the operating rotational speed.

[0098] Preferably, the additional sensor unit 38a has at least one, particularly the aforementioned first sensor element 40a, configured to sense at least one conductivity characteristic parameter of at least one, particularly the aforementioned operator 42a. Preferably, the first sensor element 40a is constructed as a conductivity sensor. The conductivity characteristic parameter particularly describes the ability to conduct current. In particular, the conductivity characteristic parameter constitutes the skin conductivity of the operator 42a, particularly at least one hand 110a of the operator 42a. Preferably, the conductivity characteristic parameter constitutes an operator-specific parameter. Preferably, the first sensor element 40a is arranged on at least one handle 134a of the machine tool assembly 10a. Preferably, the control and / or adjustment unit 26a is configured to at least partially independently match at least one parameter, particularly calibrate the sensor unit 14a, based on the sensed conductivity characteristic parameter, particularly based on the analysis and processing of the sensed conductivity characteristic parameter. In particular, different conductivity characteristics, such as those of different operators 42a, different wet hands 110a, different warm hands 110a, and hands 110a with different blood pressure circulation, cause variations in the electric and / or magnetic fields of antennas 28a and 30a, especially variations in capacitance. Preferably, the control and / or adjustment unit 26a is configured to calibrate the sensor unit 14a differently according to different conductivity characteristics, especially to adjust the sensitivity of the sensor unit 14a differently. In particular, the control and / or adjustment unit 26a is configured such that the lower the conductivity characteristics of the operator 42a, especially the skin conductivity, the higher the sensitivity of the sensor unit 14a is adjusted.

[0099] Preferably, the machine tool device 10a includes at least one, particularly wireless, and especially the aforementioned communication unit 44a, configured to receive at least one operating parameter from at least one external unit 46a. The communication unit 44a of the machine tool device 10a is preferably configured as a wireless communication unit, particularly a wireless local area network (WLAN) module, a radio module, a Bluetooth module, a near-field communication module, etc. Alternatively or additionally, it is conceivable that the communication unit 44a of the machine tool device 10a is configured as a wired communication unit, particularly a USB connection port, an Ethernet connection port, a coaxial connection port, etc. Preferably, the communication unit 44a of the machine tool device 10a is connected to the control and / or regulation unit 26a (not further shown here) in terms of signal transmission technology, particularly via at least one signal line. In particular, the communication unit 44a of the machine tool device 10a is configured to provide at least one operating parameter to the control and / or regulation unit 26a, particularly in the form of at least one electrical signal.

[0100] External unit 46a can be configured, in particular, as a smartphone, server, especially a cloud server and / or database server, augmented reality glasses, computer, external sensor unit, or other external unit that appears meaningful to those skilled in the art. In this embodiment, external unit 46a is configured, for example, as augmented reality glasses. In particular, external unit 46a is constituted by display device 94a (see [link to relevant documentation]). Figure 1 In particular, the external unit 46a is constructed separately from the machine tool assembly 10a. Preferably, the external unit 46a is configured to sense, store, and / or acquire at least one operating parameter, for example from another sensor unit, a database, the Internet, or other sources that appear meaningful to those skilled in the art. In particular, the external unit 46a includes at least one, particularly the aforementioned communication unit 104a, configured to transmit at least one operating parameter to the machine tool assembly 10a, particularly the communication unit 44a of the machine tool assembly 10a. The communication unit 104a of the external unit 46a may be constructed at least substantially similar to the communication unit 44a of the machine tool assembly 10a. Preferably, the communication unit 44a of the machine tool assembly 10a may be configured to provide the external unit 46a with identification data about the machine tool assembly 10a, wherein the external unit 46a of the machine tool assembly 10a may provide at least one operating parameter suitable for the identification data.

[0101] Preferably, the control and / or adjustment unit 26a is configured to trigger at least one action based on a common analysis of at least one signal from the sensor unit 14a and at least one operating parameter. In particular, the control and / or adjustment unit 26a is configured to perform analysis, particularly weighting, on at least one operating parameter while considering at least one signal from the sensor unit 14a, and / or perform analysis, particularly weighting, on at least one operating parameter while considering at least one signal from the sensor unit 14a. In particular, the control and / or adjustment unit 26a may be configured to prohibit at least one action based on a common analysis of at least one signal from the sensor unit 14a and at least one operating parameter. In particular, the control and / or adjustment unit 26a may be configured to trigger at least one action, particularly multiple actions, based on a common analysis of at least one signal from the sensor unit 14a, particularly multiple signals from the sensor unit 14a, and at least one operating parameter, particularly multiple operating parameters.

[0102] Preferably, the control and / or adjustment unit 26a is configured to trigger different actions based on different results of a common analysis of at least one signal from the sensor unit 14a and at least one operating parameter. Preferably, the control and / or adjustment unit 26a is configured to trigger at least one action based on the result of a common analysis of at least one signal from the sensor unit and at least one operating parameter, which can achieve an optimized combination of operational safety and operational comfort. For example, the control and / or adjustment unit 26a can be configured to trigger motor braking of the motor 124a driving the machining tool 12a based on the small approach speed of the foreign objects 16a, 18a approaching the machining tool 12a and the small inertia of the machining tool 12a, particularly to achieve stationary braking of the machining tool 12a before contact with the foreign objects 16a, 18a while maintaining a small mechanical load on the machining tool 12a. For example, the control and / or adjustment unit 26a may be configured to trigger the mechanical braking of the machining tool 12a, in addition to the motor braking of the motor 124a driving the machining tool 12a (which, in the current situation, can particularly brake the machining tool 12a to a stop before the foreign objects 16a, 18a come into contact with it), based on the high approach speed of the foreign objects 16a, 18a approaching the machining tool 12a and the large inertia of the machining tool 12a. In particular, in the memory unit of the control and / or adjustment unit 26a, multiple possible results of the common analysis and processing of at least one signal from the sensor unit 14a and at least one operating parameter are stored, preferably each possible result is associated with an action to be triggered. Preferably, the control and / or adjustment unit 26a is configured to trigger at least one action associated with a corresponding result of the analysis and processing.

[0103] Preferably, the control and / or adjustment unit 26a is configured to classify different foreign objects 16a, 18a sensed by the sensor unit 14a and trigger different actions according to different types. In particular, the control and / or adjustment unit 26a is configured to distinguish different types of foreign objects 16a, 18a based on different signals from the sensor unit 14a, for example, distinguishing foreign object 16a from other foreign objects 18a in this embodiment. In particular, different types of foreign objects 16a, 18a have different electrical and / or magnetic properties, especially capacitive properties, which affect the electric and / or magnetic fields of the antennas 28a, 30a in particular differently. In particular, each type of foreign object 16a, 18a has its own electrical and / or magnetic characteristics, especially capacitive characteristics. Preferably, the control and / or adjustment unit 26a is configured to identify the type of foreign objects 16a, 18a based on their electrical and / or magnetic characteristics, especially capacitive characteristics, and classify the foreign objects 16a, 18a. Preferably, the memory unit of the control and / or adjustment unit 26a stores electrical and / or magnetic markers, especially capacitive markers, for different types of foreign objects 16a, 18a. In particular, the control and / or adjustment unit 26a is configured to compare the signals sensed by the sensor unit 14a for the foreign objects 16a, 18a with the stored markers and classify the foreign objects 16a, 18a based on the comparison.

[0104] In particular, the control and / or adjustment unit 26a is configured to distinguish between living and non-living foreign objects 16a and 18a based on different signals from the sensor unit 14a, and to classify the foreign objects 16a and 18a accordingly. Preferably, the control and / or adjustment unit 26a is configured to distinguish between living foreign objects 16a (human and animal) based on different signals from the sensor unit 14a and to classify the foreign objects 16a accordingly. In this embodiment, the control and / or adjustment unit 26a is configured, for example, to classify the operator 42a's hand 110a as a living foreign object 16a (human). Preferably, the control and / or adjustment unit 26a is configured to distinguish between non-living foreign objects 18a (of different materials) based on different signals from the sensor unit 14a and to classify the foreign objects 18a accordingly. In this embodiment, the control and / or adjustment unit 26a is configured, for example, to classify a nail 112a as a non-living foreign object 18a (made of metal). Preferably, the memory unit of the control and / or adjustment unit 26a stores different actions to be triggered for different types of foreign objects 16a, 18a. In particular, the control and / or adjustment unit 26a is configured to trigger at least one action belonging to the classification of the sensed foreign objects 16a, 18a. For example, the control and / or adjustment unit 26a can be configured to trigger the removal of the processing tool 12a from the danger zone 96a based on the detection of another foreign object 18a classified as an inanimate foreign object 18a, and to trigger mechanical braking of the processing tool 12a based on the detection of a foreign object 16a classified as a animate foreign object 16a.

[0105] Preferably, the machine tool assembly 10a includes at least one, particularly the aforementioned mechanical braking unit 54a, configured to brake the machining tool 12a, wherein the control and / or adjustment unit 26a is configured to use at least one current for motor braking to operate the mechanical braking unit 54a. Preferably, the mechanical braking unit 54a is configured to mechanically brake the moving, particularly rotating, machining tool 12a, particularly until the machining tool 12a comes to a stop. Preferably, the mechanical braking unit 54a is configured to actively brake the machining tool 12a, particularly by means of force-locking and / or form-locking with the machining tool 12a and / or driven shaft 120a, on which the machining tool 12a is supported. In particular, the mechanical braking unit 54a includes at least one mechanical braking element 136a, particularly such as a brake caliper, ring spring, locking pin, etc., as in this embodiment, which is capable of force-locking and / or form-locking coupling with the machining tool 12a and / or driven shaft 120a to achieve active braking of the machining tool 12a. Alternatively or additionally, the mechanical braking unit 54a may be configured to passively brake the machining tool 12a, particularly by decoupling the machining tool 12a from the motor 124a that drives the machining tool 12a. Preferably, the mechanical braking unit 54a is configured to brake the machining tool 12a until it comes to a stop no later than 200 milliseconds after the mechanical braking is triggered. Preferably, the mechanical braking unit 54a is configured to brake the machining tool 12a by means of such braking force, such that the machining tool 12a slips at least temporarily relative to the driven shaft 120a during braking, and moves particularly faster than the driven shaft 120a.

[0106] Preferably, the control and / or regulating unit 26a is configured to perform motor braking, particularly to operate the motor 124a driving the machining tool 12a for braking. Specifically, the control and / or regulating unit 26a may be configured to perform motor braking of varying intensities based on different power consumption of the motor 124a. In particular, the control and / or regulating unit 26a is configured to shut down, short-circuit, reverse polarity, etc., the motor 124a driving the machining tool 12a, in particular the electric motor, to achieve motor braking. Especially during motor braking, at least one current, particularly a larger current than that during normal operation of the motor 124a, flows. Preferably, the control and / or regulating unit 26a is configured to operate at least one trigger unit 138a by means of at least one current for motor braking, particularly to direct at least one current for motor braking to the trigger unit 138a. In particular, as in this embodiment, for example, the control and / or regulating unit 26a or the mechanical braking unit 54a includes the trigger unit 138a. Preferably, the trigger unit 138a is configured to release at least one mechanical braking element 136a and / or at least one brake actuator of the mechanical braking unit 54a. The trigger unit 138a can be configured in particular as shape memory metal (as in this embodiment, for example), a relay, an electromagnet, a fuse, or other trigger unit that appears meaningful to those skilled in the art. In particular, at least one current applied to the motor brake can deform a trigger unit 138a configured as shape memory metal, switch an alternative trigger unit configured as a relay or electromagnet, and / or melt an alternative trigger unit configured as a fuse.

[0107] Figure 4 Show Figure 1 A detailed schematic diagram of a part of machine tool 90a, especially machining tool 12a.

[0108] Preferably, the sensor unit 14a is configured to provide multiple detection areas 20a, 22a, 24a with different radii 48a, 50a, 52a surrounding the machining tool 12a. Preferably, the antennas 28a, 30a are configured to provide multiple detection areas 20a, 22a, 24a with different radii 48a, 50a, 52a surrounding the machining tool 12a. Alternatively or additionally, the sensor unit 14a may include multiple antennas 28a, 30a, particularly multiple antennas 28a, 30a corresponding to the number of detection areas 20a, 22a, 24a to be provided, wherein, particularly, each antenna 28a, 30a is configured to provide at least one of the multiple detection areas 20a, 22a, 24a. In this embodiment, the sensor unit 14a is configured, for example, to provide a first detection region 24a with a first radius 52a surrounding the machining tool 12a, a second detection region 22a with a second radius 50a surrounding the machining tool 12a, and a third detection region 20a with a third radius 48a surrounding the machining tool 12a. Preferably, the detection regions 20a, 22a, and 24a are constructed in a layered or bowl-shaped manner, particularly a cylindrical bowl shape, a spherical bowl shape, etc. In particular, the detection regions 20a, 22a, and 24a have equidistant extension scales when observed along the radii 48a, 50a, and 52a of the detection regions 20a, 22a, and 24a. Alternatively, it is conceivable that the detection regions 20a, 22a, and 24a have different extension scales when observed along the radii 48a, 50a, and 52a of the detection regions 20a, 22a, and 24a.

[0109] The control and / or adjustment unit 26a is preferably configured to determine the distance between foreign objects 16a and 18a and the processing tool 12a based on the sensing of foreign objects 16a and 18a in defined detection areas 20a, 22a, and 24a. In particular, the control and / or adjustment unit 26a is configured to determine the movement speed of the foreign objects 16a and 18a, especially the approach speed of the foreign objects 16a and 18a towards the processing tool 12a, based on the past duration of sensing between two different, particularly adjacent, detection areas 20a, 22a, and 24a, and based on the extension scale of the detection areas 20a, 22a, and 24a. Preferably, the control and / or adjustment unit 26a is configured to determine the movement acceleration of the foreign objects 16a and 18a, especially the approach acceleration of the foreign objects 16a and 18a towards the processing tool 12a, based on the different movement speeds determined in different detection areas 20a, 22a, and 24a.

[0110] Preferably, the control and / or adjustment unit 26a is configured to cascade different actions based on different signals from the sensor unit 14a, corresponding to the sensing of at least one foreign object 16a, 18a in different detection areas 20a, 22a, 24a. In particular, the control and / or adjustment unit 26a is configured to cascade different actions based on different distances between the foreign object 16a, 18a and the processing tool 12a. It is particularly conceivable that the control and / or adjustment unit 26a is configured to trigger an output warning signal based on a signal from the sensor unit 14a, corresponding to the sensing of a foreign object in the first detection area 24a having the maximum distance from the processing tool 12a. It is particularly conceivable that the control and / or adjustment unit 26a is configured to trigger the shutdown of the motor 124a driving the processing tool 12a based on a signal from the sensor unit 14a, corresponding to the sensing of a foreign object 16a, 18a in the second detection area 22a having a smaller distance from the processing tool 12a than the first detection area 24a. In particular, the control and / or adjustment unit 26a is configured to trigger mechanical braking of the machining tool 12a based on a signal from the sensor unit 14a, corresponding to the sensing of foreign objects 16a, 18a in a third detection area 20a that has a smaller distance from the machining tool 12a than the second detection area 22a. Preferably, the control and / or adjustment unit 26a is configured to trigger multiple different actions, particularly in a cascaded manner, based on multiple successive different signals from the sensor unit 14a, corresponding to the movement of the foreign objects 16a, 18a through different detection areas 20a, 22a, 24a. In particular, it is conceivable that the control and / or adjustment unit 26a cascades the output of warning signals, the shutdown of the motor 124a of the machining tool 12a, and the mechanical braking of the machining tool 12a based on multiple successive different signals from the sensor unit 14a, corresponding to the movement of foreign objects 16a and 18a into the first detection area 24a, from the first detection area 24a to the second detection area 22a, and from the second detection area 22a to the third detection area 20a.

[0111] Figure 5a Show Figure 1 A schematic cross-sectional view of the protection unit 62a of the machine tool assembly 10a for machine tool 90a. Preferably, the machine tool assembly 10a includes at least one, particularly the aforementioned protection unit 62a, which at least partially surrounds at least one antenna 28a, 30a and is configured to protect at least one antenna 28a, 30a from environmental influences. Figure 5a In the middle and below Figures 5b to 5f For clarity, only antenna 28a is shown in the diagram, and therefore only antenna 28a will be described in the following description. However, this description also applies similarly to the other antenna 30a (see also...). Figure 6Preferably, at least one protection unit 62a is configured to protect at least one antenna 28a from mechanical environmental influences, particularly impacts, vibrations, abrasion, etc. In particular, at least one protection unit 62a may be at least partially made of a material that absorbs impacts and / or is abrasion-resistant, such as rubber, silicone, etc. Preferably, the protection unit 62a is made of an electrically insulating material. In particular, the impact protection member 140a of the machine tool assembly 10a may at least partially constitute at least one protection unit 62a. In particular, at least one antenna 28a may at least partially integrate into the impact protection member 140a of the machine tool assembly 10a. In this embodiment, the antenna 28a is, for example, surrounded by an additional material layer 142a of the impact protection member 140a and the protection unit 62a. In particular, the impact protection member 140a forms at least partially the outer side 144a of the slide plate 146a of the machine tool assembly 10a, particularly the workpiece contact surface 68a, and the protection unit 62a and the antenna 28a are arranged therein at least partially. In particular, an additional material layer 142a of the protective unit 62a is arranged within the slide plate 146a, shielding the antenna 28a, especially relative to the slide plate 146a. Preferably, at least one protective unit 62a is configured to protect at least one antenna 28a from weather- and / or environmental influences, particularly moisture, frost, heat, etc. In particular, at least one protective unit 62a may be at least partially constructed of at least partially fluid-sealed, especially waterproof, and / or temperature-insulating material. Preferably, at least one protective unit 62a completely, especially when viewed along any spatial orientation, surrounds at least one antenna 28a. Alternatively, it is conceivable that at least one protective unit 62a partially surrounds at least one antenna 28a, for example, at least on the workpiece contact surface 68a. Preferably, at least one protective unit 62a is partially injection-molded onto at least one antenna 28a and / or onto at least one shielding unit 64a of the machine tool assembly 10a, especially encapsulating around at least one antenna 28a and / or around at least one shielding unit 64a. Alternatively, at least one antenna 28a and / or at least one shielding unit 64a may be at least partially inserted, clamped, glued, welded, brazed, or similarly mounted into at least one protective unit 62a. Preferably, the machine tool device 10a may have a plurality of protective units 62a, particularly a plurality of protective units 62a corresponding to the number of antennas 28a, 30a. Alternatively (e.g., in this embodiment) or additionally, it may be conceivable that a single protective unit 62a is configured to receive, particularly at least partially surround, a plurality of antennas 28a, 30a (see...). Figure 6 ).

[0112] Preferably, the machine tool apparatus 10a includes at least one, particularly at least one, of the aforementioned shielding unit 64a, which at least partially surrounds at least one antenna 28a, 30a and is configured to shield at least one electric and / or magnetic field of at least one antenna 28a, 30a defining at least one detection area 20a, 22a, 24a along at least one of the transmission directions 66a, 70a. Preferably, the at least one shielding unit 64a is made of a material impermeable to electromagnetic radiation, particularly to electric and / or magnetic fields, particularly metals, such as lead, iron, steel, etc. In particular, the at least one shielding unit 64a is configured to absorb and / or reflect the electric and / or magnetic field of at least one antenna 28a along at least one transmission direction 66a. Additionally, it is conceivable that the at least one shielding unit 64a is configured to focus the electric and / or magnetic field of at least one antenna 28a along at least one unshielded transmission direction 70a. Preferably, the at least one shielding unit 64a partially surrounds at least one antenna 28a. In particular, at least one antenna 28a is arranged unshielded along at least one transmission direction 70a, especially along another transmission direction 70a, along which a shielding element 64a shields the electric and / or magnetic fields of another antenna 30a (see [link to relevant documentation]). Figure 6 In particular, at least one hazardous area 148a of the machining tool 12a, such as the cutting edge of the machining tool 12a (not shown here), is arranged along at least one additional transmission direction 70a (when viewed from the direction of the additional transmission, at least one antenna 28a is arranged without shielding).

[0113] In particular, at least one shielding unit 64a may at least partially surround at least one protective unit 62a, as is particularly true in this embodiment, and / or at least one protective unit 62a may at least partially surround at least one shielding unit 64a. In particular, at least one protective unit 62a may at least partially integrate into at least one shielding unit 64a, as is, for example, in this embodiment, and / or at least one shielding unit 64a may at least partially integrate into at least one protective unit 62a. Preferably, in an alternative embodiment, at least one protective unit 62a and at least one shielding unit 64a may be constructed as a single piece. In particular, in an alternative embodiment, the machine tool device 10a may have at least one combined protective and shielding unit. Preferably, at least one shielding unit 64a is at least partially cast onto at least one antenna 28a and / or at least one protective unit 62a, particularly around at least one antenna 28a and / or around at least one protective unit 62a. Alternatively, as particularly in this embodiment, at least one antenna 28a and / or at least one protection unit 62a may be at least partially inserted, clamped, glued, welded, brazed, or similarly mounted into at least one shielding unit 64a. Preferably, the machine tool device 10a may have a plurality of shielding units 64a, particularly a plurality of shielding units 64a corresponding to the number of antennas 28a, 30a. Alternatively or additionally, as in, for example in this embodiment, a single shielding unit 64a may be configured to receive, particularly at least partially surround, a plurality of antennas 28a, 30a (see...). Figure 6 Preferably, at least one shielding unit 64a is at least partially constituted by the table, base plate, slide plate 146a, etc. of the machine tool 10a. In this embodiment, the shielding unit 64a is, for example, constituted by the slide plate 146a of the machine tool 10a. In particular, the antenna 28a and the protection unit 62a are at least partially arranged in the recess 150a of the slide plate 146a.

[0114] Figure 5b A schematic cross-sectional view of a first alternative protection unit 62a' for the machine tool assembly 10a is shown. The protection unit 62a' is similar to the one in the example except for the impact protection member 140a. Figure 5a The protective unit 62a shown is constructed as follows. In particular, the protective unit 62a' is constructed as a collision-free protective element. Preferably, the antenna 28a terminates flush with the outer side 144a' of the slide plate 146a'. Preferably, the protective unit 62a' includes a material layer 142a' that at least partially surrounds the antenna 28a.

[0115] Figure 5cA schematic cross-sectional view of a second alternative protective unit 62a" of the machine tool assembly 10a is shown. The protective unit 62a" includes, in particular, a collision protector 140a" that extends beyond the recess 150a" of the slide plate 146a" on the outer side 144a" of the slide plate 146a" and covers, in particular, the entire outer side 144a" of the slide plate 146a".

[0116] Figure 5d A schematic cross-sectional view of a third alternative protective unit 62a"' of the machine tool assembly 10a is shown. The protective unit 62a"' includes, in particular, a collision protector 140a"' that surrounds the antenna 28a along multiple sides, especially along multiple sides other than the additional material layer 142a"' of the protective unit 62a"'. The slide plate 146a"' is constructed without recesses. In particular, the collision protector 140a"' has a recess 152a"' for receiving the antenna 28a and the additional material layer 142a"'. In particular, the recess 152a"' faces the slide plate 146a"' and is covered by the slide plate 146a"'.

[0117] Figure 5e A schematic cross-sectional view of a fourth alternative protective unit 62a"" of the machine tool assembly 10a is shown. The protective unit 62a"" includes, in particular, a collision protection element 140a"" that surrounds the antenna 28a along multiple sides. In particular, the protective unit 62a"" is constructed without an additional material layer. The slide plate 146a"" is constructed without a recess. In particular, the collision protection 140a"" has a recess 152a"" for receiving the antenna 28a. In particular, the recess 152a"" is opposite to the slide plate 146a""." In particular, the antenna 28a terminates flush with the collision protection 140a""."

[0118] Figure 5f A schematic cross-sectional view of a fifth alternative protective unit 62a""' of the machine tool assembly 10a is shown. The protective unit 62a""' includes a collision protector 140a""' surrounding the antenna 28a on at least two mutually opposite sides. Specifically, the collision protector 140a""' terminates flush with the two mutually opposite outer sides 144a""' and 154a""" of the slide plate 146a""'. An additional material layer 142a""' of the protective unit 62a""' is arranged in a recess 150a""' of the slide plate 146a""', and the collision protector 140a""' is arranged at least sectionally in the recess 150a""'.

[0119] Figure 6A schematic cross-sectional view of the slide 146a of the machine tool assembly 10a is shown. Preferably, the machine tool assembly 10a includes at least one, particularly the aforementioned workpiece contact surface 68a, wherein the sensor unit 14a includes at least one additional, particularly the aforementioned antenna 30a, which has at least one emission direction 70a that is antiparallel to at least one, particularly the aforementioned additional emission direction and transverse to, particularly perpendicular to, the emission direction 72a extending from the workpiece contact surface 68a. In particular, the worktable, the base plate, the slide of the machine tool assembly 10a, or other components of the machine tool assembly 10a that appear meaningful to those skilled in the art may include the workpiece contact surface 68a. In this embodiment, the slide 146a includes, for example, the workpiece contact surface 68a. In particular, the outer side 144a of the slide 146a constitutes the workpiece contact surface 68a. In particular, at least two antennas 28a, 30a are arranged on opposite sides of the slide 146a. Preferably, at least one additional antenna 30a is arranged on another surface 156a of the machine tool assembly 10a opposite to the workpiece contact surface 68a, particularly on another outer side 154a of the slide plate 146a, and at least one antenna 28a is arranged on the workpiece contact surface 68a. Specifically, the workpiece contact surface 68a and the other surface 156a are parallel to each other. In particular, at least one antenna 28a and at least one additional antenna 30a are parallel to each other.

[0120] Preferably, at least one antenna 28a has a plurality of transmission directions 70a, which extend laterally to each of a transmission direction 72a of at least one other antenna 30a. In particular, at least one transmission direction 70a of at least one antenna 28a, preferably each transmission direction 70a, points away from at least one other antenna 30a. In particular, at least one shielding unit 64a shields the electric and / or magnetic fields of at least one antenna 28a at least along the direction pointing to at least one other antenna 28a. In particular, at least one transmission direction 72a of at least one other antenna 30a, preferably each transmission direction 72a, points away from at least one antenna 28a. In particular, the shielding unit 64a of the machine tool assembly 10a shields the electric and / or magnetic fields of at least one other antenna 30a at least along the direction pointing to at least one antenna 28a. Preferably, the machining tool 12a, in at least one operating state, extends at least sectionally through the workpiece contact surface 68a and / or the other surface 156a, particularly through the slide plate 146a, which has the workpiece contact surface 68a and the other surface 156a (see...). Figure 3Preferably, a detection area 20a defined by the electric and / or magnetic field of at least one antenna 28a covers the danger area 148a, particularly the cutting edge, of the machining tool 12a arranged on one side of the workpiece contact surface 68a, and a detection area 20a defined by the electric and / or magnetic field of at least one other antenna 30a covers the danger area 148a, particularly the cutting edge, of the machining tool 12a arranged on the other side 156a.

[0121] Figure 7a Show Figure 1 A schematic top view of the machine tool 90a, particularly the workpiece contact surface 68a. Preferably, at least one antenna 28a, 30a has a non-linear trajectory and, when viewed in at least one plane 74a, surrounds the machining tool 12a along at least two sides 76a, 78a, 80a. In particular, antenna 28a and the other antenna 30a have a non-linear trajectory and surround the machining tool 12a along at least two sides 76a, 78a, 80a in at least two mutually parallel extending planes 74a. Based on the drawing type, in Figure 7a Only antenna 28a is visible in the image, and it is also specifically referenced below. Figures 7b to 7dThe description is as follows. However, this description, based on the parallel orientation of antenna 28a, also applies to the other antenna 30a. Preferably, at least one antenna 28a surrounds the machining tool 12a at least along at least two sides 76a, 78a, 80a, as observed in at least one plane 74a parallel to the workpiece contact surface 68a, particularly along the workpiece contact surface 68a. In particular, at least one antenna 28a surrounds the machining tool 12a along at least two sides 76a, 78a, 80a, preferably along at least three sides 76a, 78a, 80a, and particularly preferably along four sides 76a, 78a, 80a, as observed in at least one plane 74a. In this embodiment, the antenna 28a surrounds the machining tool 12a, for example, along three sides 76a, 78a, 80a, as observed in the plane 74a. In particular, the machining tool 12a has two dangerous sides, particularly the cutting edge side and two blade sides, as observed in at least one plane 74a. In particular, the first side 76a and the third side 80a (along these sides, the antenna 28a, as observed in plane 74a, surrounds the machining tool 12a) constitute two dangerous sides, especially the cutting edge sides. In particular, the second side 78a (along this side, the antenna 28a, as observed in plane 74a, surrounds the machining tool 12a) constitutes the blade side. Preferably, at least one antenna 28a observes the machining tool 12a along at least one dangerous side and along at least one blade side in at least one plane 74a. In this embodiment, the antenna 28a observes the machining tool 12a in plane 74a, for example, along both dangerous sides and along one blade side. Preferably, at least one antenna 28a at least segmentally depicts at least one curve, at least one turn, at least one angle, or at least one other non-linear shape that appears meaningful to those skilled in the art. In particular, at least one antenna 28a, when viewed in at least one plane 74a, has a U-shaped profile, specifically two parallel sub-segments 158a and 160a, which are interconnected by a third sub-segment 162a arranged transversely to, and particularly perpendicularly to, these two sub-segments 158a and 160a. Specifically, the first sub-segment 158a of the antenna 28a, when viewed in plane 74a, covers the processing tool 12a along a first side 76a. Specifically, the second sub-segment 160a of the antenna 28a, when viewed in plane 74a, covers the processing tool 12a along a third side 80a. Specifically, the third sub-segment 162a of the antenna 28a, when viewed in plane 74a, covers the processing tool 12a along a second side 78a.

[0122] Figure 7b The image shows a sensor unit 14a' with a first alternative sensor unit. Figure 1A schematic top view of the machine tool 90a, particularly the workpiece contact surface 68a. Specifically, the sensor unit 14a' has an antenna 28a' and a third antenna 32a'. The antennas 28a' and 32a' of the sensor unit 14a' have non-linear orientations and, when viewed in plane 74a, surround the machining tool 12a along sides 76a, 78a, and 80a respectively. Specifically, antenna 28a' surrounds the machining tool 12a along the first side 76a and the second side 78a when viewed in plane 74a. Specifically, the third antenna 32a' surrounds the machining tool 12a along the second side 78a and the third side 80a when viewed in plane 74a. Specifically, antenna 28a' has an L-shaped orientation when viewed in plane 74a, particularly two sub-segments 158a' and 160a' arranged laterally and perpendicularly to each other. In particular, the first sub-segment 158a' of antenna 28a' covers the processing tool 12a along the first side 76a when viewed in plane 74a. In particular, the second sub-segment 160a' of antenna 28a' covers the processing tool 12a at least partially along the second side 78a when viewed in plane 74a. In particular, the third antenna 32a' has an L-shaped orientation when viewed in plane 74a, consisting of two sub-segments 164a' and 166a' arranged laterally and perpendicularly to each other. In particular, the first sub-segment 164a' of the third antenna 32a' covers the processing tool 12a along the third side 80a when viewed in plane 74a. In particular, the second sub-segment 166a' of the third antenna 32a' covers the processing tool 12a at least partially along the second side 78a when viewed in plane 74a. Preferably, antenna 28a' and third antenna 32a' are arranged axially symmetrically about a virtual plane extending through the driven axis 120a and perpendicular to plane 74a. In particular, sensor unit 14a' may have an additional antenna arranged parallel to third antenna 32a' in a plane extending parallel to plane 74a.

[0123] Figure 7c The image shows a sensor unit 14a" with a second alternative sensor unit. Figure 1A schematic top view of the machine tool 90a, particularly the workpiece contact surface 68a. Specifically, the sensor unit 14a" has an antenna 28a", a third antenna 32a" and a fourth antenna 34a" respectively. The antennas 28a", 32a" and 34a" have a linear orientation and, when viewed in plane 74a, surround the machining tool 12a along sides 76a, 78a and 80a respectively. Specifically, antenna 28a" covers the machining tool 12a along the first side 76a when viewed in plane 74a. Specifically, the third antenna 32a" covers the machining tool 12a along the third side 80a when viewed in plane 74a. Specifically, the fourth antenna 34a" covers the machining tool 12a along the second side 78a when viewed in plane 74a. Preferably, antennas 28a" and 32a" are arranged parallel to each other in plane 74a. Preferably, the fourth antenna 34a" is arranged vertically in plane 74a, particularly between antenna 28a" and the third antenna 32a" . In particular, sensor unit 14a" may have an additional antenna arranged parallel to the third antenna 32a" and the fourth antenna 34a" in a plane extending parallel to plane 74a.

[0124] Figure 7d The diagram shows a sensor unit 14a"' with a third alternative. Figure 1 A schematic top view of the machine tool 90a, particularly the workpiece contact surface 68a. Specifically, the sensor unit 14a"' has an antenna 28a"', a third antenna 32a"', a fourth antenna 34a"', and a fifth antenna 36a"'. The antennas 28a"', 32a"', 34a"', and 36a"' have a linear orientation and, when viewed from plane 74a, surround the machining tool 12a along sides 76a, 78a, 80a, and 82a respectively. Specifically, antenna 28a"' covers the machining tool 12a along the first side 76a when viewed from plane 74a. Specifically, the third antenna 32a"' covers the machining tool 12a along the third side 80a when viewed from plane 74a. Specifically, the fourth antenna 34a"' covers the machining tool 12a along the second side 78a when viewed from plane 74a. In particular, the fifth antenna 36a"' covers the processing tool 12a along the fourth side 82a when viewed in plane 74a. Preferably, antennas 28a"' and the third antenna 32a"' are arranged parallel to each other in plane 74a. Preferably, the fourth antenna 34a"' and the fifth antenna 36a"' are arranged parallel to each other in plane 74a. Preferably, the fourth antenna 34a"' and the fifth antenna 36a"' are arranged vertically in plane 74a, especially between antennas 28a"' and the third antenna 32a"'. In particular, sensor unit 14a"' may have an additional antenna arranged parallel to the third antenna 32a"', the fourth antenna 34a"', and the fifth antenna 36a"' in a plane extending parallel to plane 74a.

[0125] The following describes the apparatus for operating machine tools, particularly according to Figures 1 to 3 The method of the aforementioned machine tool apparatus 10a. Preferably, in at least one method step, at least one electric field and / or magnetic field is emitted by means of at least one, in particular at least one of the aforementioned antennas 28a, 30a, which defines at least one detection area 20a, 22a, 24a surrounding at least one, in particular the aforementioned machining tool 12a of the machine tool apparatus 10a; and / or at least one foreign object 16a, 18a is sensed by means of at least one antenna 28a, 30a based on at least one change in at least one electric field and / or magnetic field.

[0126] Preferably, in at least one additional method step, at least one parameter is matched at least partially independently according to at least one operating parameter, particularly by the control and / or adjustment unit 26a. Further method steps for operating the machine tool apparatus 10a can be referred to the above description of the machine tool apparatus 10a, as this description can also be interpreted in relation to the method, and therefore, all features of the machine tool apparatus 10a are also considered disclosed with respect to the method for operating the machine tool apparatus 10a.

[0127] exist Figures 8 to 11 Four further embodiments of the invention are shown below. The following description and drawings are essentially limited to the differences between the various embodiments, wherein references to elements with the same designation, especially those having the same reference numerals, may also be made in principle, particularly to the embodiments shown. Figures 1 to 7d Other embodiments are illustrated in the accompanying drawings and / or descriptions. To distinguish the embodiments, the letter 'a' is placed after the... Figures 1 to 7d Reference numerals in the accompanying drawings of the embodiments. Figures 8 to 11 In various embodiments, the letter 'a' is replaced by the letters 'b' through 'e'.

[0128] Figure 8 A schematic perspective view of a first alternative machine tool 90b is shown. Machine tool 90b is particularly configured as a cross-cutting and / or miter saw. Preferably, machine tool 90b includes a machine tool assembly 10b. Preferably, machine tool assembly 10b is configured for cutting and / or sawing workpieces. Machine tool assembly 10b particularly includes at least one motor-driven machining tool 12b, particularly a circular saw blade, at least one particularly capacitive sensor unit 14b, and at least one control and / or adjustment unit 26b. Sensor unit 14b preferably includes at least one antenna 28b, 30b, 32b, and in this embodiment, for example, includes three antennas 28b, 30b, 32b, particularly antenna 28b, another antenna 30b, and a third antenna 32b.

[0129] Preferably, the machine tool assembly 10b includes at least one swing unit 56b for swingably supporting the machining tool 12b, wherein the control and / or adjustment unit 26b is configured to at least partially independently match at least one parameter, particularly at least one detection area 20b, according to at least one swing angle 58b of the machining tool 12b. Preferably, the machine tool assembly 10b, in lieu of or additional to the mechanical braking unit, also includes the swing unit 56b. Preferably, the swing unit 56b includes at least one swing arm 168b on which the machining tool 12b is supported, and the swing unit further includes at least one swing bearing 170b, particularly a rotary hinge, configured to swingably support the swing arm 168b relative to the base unit 172b of the machine tool assembly 10b, particularly about a swing axis 174b. In particular, the swing unit 56b may include at least one additional swing bearing, particularly an inclined hinge, configured to swingably support the swing arm 168b relative to the base unit 172b about another swing axis extending particularly perpendicular to the swing axis 174b (not shown further here). Preferably, the machine tool device 10b includes at least one swing sensor unit 188b, which is configured to sense at least one swing angle 58b of the machining tool 12b, especially the swing arm 168b, relative to the base unit 172b, especially relative to the base surface 176b of the base unit 172b, and to provide it to the control and / or adjustment unit 26b.

[0130] The sensor unit 14b, and particularly the third antenna 32b, is preferably arranged on, and particularly within, the basic unit 172b. Specifically, the distance between the third antenna 32b and the machining tool 12b is related to at least one swing angle 58b of the machining tool 12b. Preferably, the control and / or adjustment unit 26b is configured to manipulate the sensor unit 14b such that the minimum extension dimension of the detection area 20b surrounding the machining tool 12b remains constant regardless of at least one swing angle 58b of the machining tool 12b. Specifically, the control and / or adjustment unit 26b is configured to match the detection area 20b according to at least one swing angle 58b of the machining tool 12b. Specifically, the control and / or adjustment unit 26b is configured to increase the detection area 20b as the machining tool 12b moves away from, and particularly swings away from, the third antenna 32b. Specifically, the control and / or adjustment unit 26b is configured to decrease the detection area 20b as the machining tool 12b approaches, and particularly swings towards, the third antenna 32b.

[0131] Preferably, the machine tool assembly 10b includes at least one locking unit 60b for locking the swing unit 56b, wherein the control and / or adjustment unit 26b is configured to operate the locking unit 60b according to at least one signal from the sensor unit 14b to lock the swing unit 56b. Preferably, the locking unit 60b is configured to prevent the swinging of the machining tool 12b, particularly the swing arm 168b. In particular, the locking unit 60b is configured to lock at least one swing bearing 170b. In particular, the locking unit 60b includes at least one locking element 178b, such as a fixing bolt, locking pin, brake shoe, etc., configured to lock at least one swing bearing 170b. In particular, the locking of the swing unit 56b, particularly at least one swing bearing 170b, constitutes an action to be triggered by the control and / or adjustment unit 26b according to at least one signal from the sensor unit 14b, particularly according to the sensing of a foreign object. In particular, the control and / or adjustment unit 26b is configured to trigger the locking of the swing unit 56b by operating the locking unit 60b. In particular, the control and / or adjustment unit 26b is configured to operate the locking unit 60b, replacing or attached to the motor 124b, output unit, emergency call unit, and / or mechanical braking unit of the machine tool assembly 10b, based on at least one signal from the sensor unit 14b. Alternatively, the machine tool assembly 10b may have at least one emergency oscillation actuator, wherein the control and / or adjustment unit 26b is configured to operate the emergency oscillation actuator, in particular, for the transport, and especially oscillation, of the machining tool 12b from the danger zone 96b, based on at least one signal from the sensor unit 14b.

[0132] Preferably, the machine tool assembly 10b includes at least one protective cover 84b for the machining tool 12b, wherein the sensor unit 14b includes at least one additional antenna 30b, particularly as described above, arranged at at least one end 88b of the protective cover 84b opposite to at least one end 86b on which at least one antenna 28b is arranged. The antenna 28b has a particularly non-linear profile, at least partially conforming to the shape of the protective cover 84b. The protective cover 84b is preferably configured to at least partially cover the machining tool 12b, particularly the cutting edge of the machining tool 12b. Preferably, the protective cover 84b has a partially disc-shaped, particularly semi-disc-shaped, cross-section when viewed parallel to the driven shaft 120b (on which the machining tool 12b is supported). In particular, the protective cover 84b is pivotally supported on and / or around the driven shaft 120b. In particular, the machining tool 12b has different danger zones, especially different exposed sections of the cutting edge, depending on the different swing angles of the protective cover 84b. Specifically, the danger zone of the machining tool 12b, especially the exposed cutting edge, can extend from one end 86b of the protective cover 84b along the cutting edge to the other end 88b of the protective cover 84b. In this embodiment, the machine tool assembly 10b particularly has an additional protective cover 180b for the machining tool 12b. Specifically, in this embodiment, the danger zone extends from the end 86b of the protective cover 84b to the protective cover 180b. Specifically, the protective cover 84b... Figure 8 The diagram completely covers the machining tool 12b along with the protective cover 180b. In particular, the danger zone of the machining tool 12b constitutes the area of ​​the machining tool 12b without a protective cover. Preferably, the detection area 20b of at least two antennas 28b, 30b, and especially the detection area 20b of at least two antennas 28b, 30b, moves proportionally to the swing angle of the protective cover 84b.

[0133] Figure 9A circuit diagram showing a portion of sensor unit 14b is provided. Preferably, sensor unit 14b includes at least one electrical or electronic shielding circuit 192b configured to shield the electric and / or magnetic fields emitted by at least one of antennas 28b, 30b, and 32b along at least one transmission direction. The transmission direction of at least one of antennas 28b, 30b, and 32b can be tuned by means of the shielding circuit 192b. Shielding circuit 192b is preferably constructed as a high-impedance circuit. Shielding circuit 192b preferably includes at least one high-impedance electrical structural element. In particular, at least one of antennas 28b, 30b, and 32b and / or the tuning circuit 196b of sensor unit 14b are connected to the input of shielding circuit 192b. Preferably, at least one output of shielding circuit 192b is connected to ground 194b. Preferably, shielding circuit 192b has a higher impedance at its input than at its output. For example, the impedance at the input of the shielded circuit 192b is on the order of 100 MΩ, while the impedance at the output of the shielded circuit 192b is on the order of 10 MΩ or less. However, in principle, it is also possible to consider that the orders of magnitude at the input and output of the shielded circuit 192b are different from the above values.

[0134] Figure 10A schematic perspective view of a second alternative machine tool 90c is shown. The machine tool 90c is particularly configured as a benchtop circular saw. Preferably, the machine tool 90c includes a machine tool assembly 10c. Preferably, the machine tool assembly 10c is configured for cutting and / or sawing workpieces. The machine tool assembly 10c particularly includes at least one motor-driven machining tool 12c, particularly a circular saw blade, at least one, particularly capacitive, sensor unit 14c, and at least one control and / or adjustment unit 26c. The sensor unit 14c preferably includes at least one antenna 28c, 30c, and in this embodiment, for example, includes two antennas 28c, 30c, particularly antenna 28c and another antenna 30c. In particular, the machining tool 12c constitutes another antenna 30c. The antenna 28c particularly has a non-linear trajectory and, when viewed in at least one plane 74c, surrounds the machining tool 12c along three sides 76c, 78c, 82c. The antenna 28c has a U-shaped profile and consists of two parallel sub-segments 158c and 160c, which are interconnected by a third sub-segment 162c arranged transversely to, and more particularly perpendicularly to, these two sub-segments 158c and 160c. The antenna 28c is positioned on, and more particularly within, the table 190c of the machine tool assembly 10c. Preferably, the control and / or adjustment unit 26c is configured to trigger at least one brake on the machining tool 12c based on at least one signal from the sensor unit 14c, corresponding to the sensing of a foreign object in a detection area, particularly by manipulating the mechanical brake unit 54c of the machine tool assembly 10c.

[0135] Figure 11A schematic perspective view of a third alternative machine tool 90d is shown. The machine tool 90d is particularly configured as an angle grinder. Preferably, the machine tool 90d includes a machine tool assembly 10d. Preferably, the machine tool assembly 10d is configured for cutting, sawing, and / or grinding workpieces. The machine tool assembly 10d particularly includes at least one motor-driven machining tool 12d, particularly a grinding disc, at least one, particularly capacitive, sensor unit 14d, and at least one control and / or adjustment unit 26d. The sensor unit 14d preferably includes at least one antenna 28d, 30d, and in this embodiment, for example, includes two antennas 28d, 30d, particularly antenna 28d and another antenna 30d. In particular, the driven shaft 120d of the machine tool assembly 10d (on which the machining tool 12d is supported) constitutes the other antenna 30d. Alternatively or additionally, the other antenna 30d may be arranged in and / or constituted by the flange region 182d of the machine tool assembly 10d. The antenna 28d exhibits a particularly non-linear, and especially semi-circular, trajectory. Specifically, the antenna 28d is arranged on the inner side 184d of the protective cover 180d for the machining tool 12d. In particular, the protective cover 180d serves as a shielding unit 64d for the machine tool assembly 10d. Alternatively or additionally, the protective cover 180d may constitute the antenna 28d. Preferably, the control and / or adjustment unit 26d is configured to trigger at least one brake on the machining tool 12d based on at least one signal from the sensor unit 14d, corresponding to the sensing of a foreign object in a detection area, particularly by manipulating the mechanical brake unit 54d of the machine tool assembly 10d.

[0136] Figure 12A schematic perspective view of a fourth alternative machine tool 90e is shown. The machine tool 90e is particularly configured as a planer. Preferably, the machine tool 90e includes a machine tool assembly 10e. Preferably, the machine tool assembly 10e is configured for planing workpieces. The machine tool assembly 10e particularly includes at least one motor-driven machining tool 12e, especially a planing roller, at least one, especially a capacitive, sensor unit 14e, and at least one control and / or adjustment unit 26e. The sensor unit 14e preferably includes at least one antenna 28e, 30e, 32e, and in this embodiment, for example, three antennas 28e, 30e, 32e, especially antenna 28e, another antenna 30e, and a third antenna 32e. In particular, the machining tool 12e constitutes the third antenna 32e. The antennas 28e and the other antenna 30e particularly have a linear orientation. Preferably, the antennas 28e and the other antenna 30e, when viewed in plane 74e, respectively cover one side 76e, 80e of the machining tool 12e. Preferably, antenna 28e and another antenna 30e extend parallel to each other. In particular, antenna 28e and another antenna 30e extend parallel to the rotation axis 186e of the machining tool 12e. In particular, antenna 28e and another antenna 30e are arranged in the slide plate 146e of the machine tool assembly 10e. In particular, the slide plate 146e constitutes the shielding unit 64e of the machine tool assembly 10e. Preferably, the control and / or adjustment unit 26e is configured to trigger at least one brake on the machining tool 12e based on at least one signal from the sensor unit 14e, corresponding to the sensing of a foreign object in a detection area, in particular by manipulating the mechanical braking unit 54e of the machine tool assembly 10e.

Claims

1. A machine tool apparatus, comprising: At least one motor-driven machining tool; At least one sensor unit configured to sense at least one foreign object in at least one detection area surrounding the machining tool; and At least one control and / or adjustment unit, configured to trigger at least one action based on at least one signal from the sensor unit. in, The sensor unit includes at least one antenna configured to emit at least one electric field and / or magnetic field defining the at least one detection area, and / or to sense the at least one foreign object based on at least one change in the at least one electric field and / or magnetic field. The control and / or adjustment unit is configured to match at least one parameter at least partially independently based on at least one operating parameter, the parameter constituting the detection area, constituting the type of at least one action to be triggered, the sequence of multiple actions to be triggered, and the triggering speed and / or execution speed of the at least one action.

2. The machine tool apparatus according to claim 1, characterized in that, The control and / or adjustment unit is configured to calibrate the sensor unit at least partially independently based on the at least one operating parameter.

3. The machine tool apparatus according to claim 1 or 2, characterized in that, The at least one operating parameter constitutes a motion parameter and / or an orientation parameter.

4. The machine tool apparatus according to claim 1 or 2, characterized in that, The at least one operating parameter constitutes the processing parameters.

5. The machine tool apparatus according to claim 1 or 2, characterized in that, The at least one operating parameter constitutes an operator-specific parameter.

6. The machine tool apparatus according to claim 1 or 2, characterized in that... At least one additional sensor unit configured to sense the at least one operating parameter.

7. The machine tool apparatus according to claim 6, characterized in that, The additional sensor unit (38a) has at least one sensor element (40a) configured to sense at least one conductive characteristic parameter of at least one operator (42a).

8. The machine tool apparatus according to any one of claims 1, 2 and 7, characterized in that... At least one communication unit (44a) is configured to receive the at least one operating parameter by at least one external unit (46a).

9. The machine tool apparatus according to any one of claims 1, 2, and 7, characterized in that, The control and / or adjustment unit is configured to trigger at least one action based on the joint analysis and processing of at least one signal and at least one operating parameter of the sensor unit.

10. The machine tool apparatus according to claim 9, characterized in that, The control and / or adjustment unit is configured to trigger different actions based on different results of the joint analysis and processing of at least one signal and at least one operating parameter of the sensor unit.

11. The machine tool apparatus according to any one of claims 1, 2, 7 and 10, characterized in that, The sensor unit is configured to provide multiple detection zones with different radii around the machining tool.

12. The machine tool apparatus according to claim 11, characterized in that, The control and / or adjustment unit is configured to trigger different actions based on different signals from the sensor unit corresponding to the sensing of at least one foreign object in different detection areas.

13. The machine tool apparatus according to any one of claims 1, 2, 7, 10, and 12, characterized in that, The control and / or adjustment unit is configured to classify different foreign objects sensed by the sensor unit and trigger different actions based on the different classifications.

14. The machine tool apparatus according to any one of claims 1, 2, 7, 10 and 12, characterized in that... At least one mechanical braking unit configured to brake the machining tool, wherein the control and / or adjustment unit is configured to operate the mechanical braking unit using at least one current from the motor brake.

15. The machine tool apparatus according to any one of claims 1, 2, 7, 10 and 12, characterized in that... At least one swing unit (56b) is provided for swingably supporting the machining tool, wherein the control and / or adjustment unit is configured to match at least one parameter at least partially independently according to at least one swing angle (58b) of the machining tool.

16. The machine tool apparatus according to claim 15, characterized in that... At least one locking unit (60b) for locking the swing unit (56b), wherein the control and / or adjustment unit is configured to manipulate the locking unit (60b) to lock the swing unit (56b) according to at least one signal from at least one of the sensor units.

17. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12 and 16, characterized in that... At least one protection unit (62a) surrounds at least a section of the at least one antenna and is configured to protect the at least one antenna from environmental influences.

18. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12 and 16, characterized in that... At least one shielding element, which at least partially surrounds the at least one antenna and is configured to shield at least one electric and / or magnetic field of the at least one antenna along at least one transmission direction, the electric and / or magnetic field defining the at least one detection area.

19. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12, and 16, characterized in that, The sensor unit includes an electrical or electronic shielding circuit (192b) configured to shield at least one electric and / or magnetic field emitted by the antenna along at least one transmission direction.

20. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12 and 16, characterized in that... At least one workpiece contact surface (68a), wherein the sensor unit includes at least one additional antenna having at least one transmission direction that is opposite to at least one transmission direction of the at least one antenna and extends transversely to the workpiece contact surface (68a).

21. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12, and 16, characterized in that, The at least one antenna has a non-linear trend and, when viewed in at least one plane, surrounds the machining tool along at least two sides.

22. The machine tool apparatus according to any one of claims 1, 2, 7, 10, 12 and 16, characterized in that... At least one protective cover (84b) for the machining tool, wherein the sensor unit includes at least one additional antenna disposed on at least one additional end of the protective cover (84b), the additional end being opposite to the end of the protective cover (84b) on which the at least one antenna is disposed.

23. The machine tool apparatus according to claim 1, characterized in that, The at least one sensor unit is a capacitive sensor unit.

24. The machine tool apparatus according to claim 2, characterized in that, The control and / or adjustment unit is configured to match the at least one detection area according to the at least one operating parameter.

25. The machine tool apparatus according to claim 8, characterized in that, The at least one communication unit (44a) is a wireless communication unit.

26. The machine tool apparatus according to claim 12, characterized in that, The control and / or adjustment unit is configured to trigger different actions in a cascade manner based on different signals from the sensor unit that are corresponding to sensing at least one foreign object in different detection areas.

27. The machine tool apparatus according to claim 15, characterized in that, The control and / or adjustment unit is configured to match at least one detection area according to at least one swing angle (58b) of the machining tool.

28. The machine tool apparatus according to claim 20, characterized in that, The additional antenna has at least one transmission direction that is opposite to at least one transmission direction of the at least one antenna and perpendicular to the transmission direction extending from the workpiece contact surface (68a).

29. A method for operating a machine tool apparatus according to any one of claims 1 to 28, characterized in that, In at least one method step, at least one electric field and / or magnetic field is emitted by means of at least one antenna, wherein the electric field and / or magnetic field defines at least one detection area surrounding at least one machining tool of the machine tool apparatus; and / or at least one foreign object is sensed by means of the at least one antenna based on at least one change in the at least one electric field and / or magnetic field.

30. A machine tool having at least one machine tool device according to any one of claims 1 to 28.

31. A system comprising at least one machine tool according to claim 30 and at least one display device (94a), the display device being configured to display at least one danger zone (96a) of at least one machining tool surrounding at least one machine tool assembly of the machine tool, characterized in that, The display device (94a) is configured to display the at least one danger zone (96a) according to a change in at least one parameter.

32. The system according to claim 31, characterized in that, The display device (94a) is configured to match the display of the at least one danger zone (96a) according to changes in at least one detection area surrounding the machining tool.

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