Optical detection means for a machine tool, machine tool provided therewith, tool cabinet provided therewith, machine tool system provided therewith, and method for operating such a machine tool and a machine tool system

Abstract

The aim of the invention is a further improved possible use of a machine tool (100), a tool cabinet (200), or a machine tool system (1) equipped therewith. This is achieved in that an optical detection means (300) is provided which is designed to be secured to a machine tool (100) and which has a camera (315) in order to capture at least one image of a workpiece receiving area (130) of the machine tool (100) and / or an object (135) received in the receiving area (130). The optical detection means is characterized by a holder (330) on which the camera (315) is positioned, a receiving means (305) which is positioned on the holder (330) and is designed to be selectively secured to or removed from a tool receiving area (125) of the machine tool (100), at least one energy store (365) which is positioned on the holder (330) and is operatively connected to the camera (315), at least one electronic means (340) which is designed to convert images captured by the camera (315) into data which represents images, and at least one transmitter (350) which is designed to transmit the camera (315) data which represents images to a receiver (180, 215), the receiver being remote from the optical detection means (300).

Description

[0001] Kern Microtechnik GmbH

[0002] Optical detection device for a machine tool, machine tool equipped therewith, tool cabinet equipped therewith, machine tool system equipped therewith, and method for operating such a machine tool and a machine tool system

[0003] The present invention relates to an optical detection means for a machine tool according to claim 1, a machine tool provided therein according to claim 11, a tool cabinet provided therein according to claim 13, a machine tool system provided therein according to claim 15, and a method for operating such a machine tool or a method for operating such a machine tool system according to claim 16.

[0004] From DE 102019 124887 A1, a machine tool system with an optical detection device is known. The optical detection device comprises a camera fixed to a spindle holder. The optical axis of the camera is aligned in the direction of a tool held in the spindle. Viewing a workpiece located in a workpiece holder is not possible or only possible with great difficulty using the known device.

[0005] From DE 10 2019 002 103 A1, a machine tool system is known in which an optical detection device is provided. The machine tool system has a tool holder for receiving a tool in a movable spindle and a workpiece holder located on a movable table for receiving a workpiece. The tool holder is operatively connected to a tool changer, so that a tool can be mounted in the spindle from a nearby tool magazine and used to machine a workpiece located in the workpiece holder. Optionally, the tool can be transferred from the spindle back into the tool magazine by means of the tool changer. The optical

[0006] Page 1 of 40 Kern Microtechnik GmbH

[0007] The detection device comprises a first camera mounted on the table and aligned towards the spindle. The optical detection device also comprises a second camera mounted on the spindle and aligned towards the table. In other words, the first camera moves with the table relative to the spindle, and the second camera moves with the spindle relative to the table.

[0008] According to DE 10 2019 002 103 A1, by comparing a second image taken by the first camera with a first image taken by the same camera, or by comparing a second image taken by the second camera with a first image taken by the same camera, it is possible to precisely manufacture a three-dimensional object by appropriately controlling the machine tool system. Information regarding the specific design of the optical detection means, their attachment to the table or spindle, and the manner in which the captured images or their electronic signals are transmitted within the machine tool system is not provided in DE 10 2019 002 103 A1.

[0009] From DE 102016001 337 A1, a workpiece positioning device with an optical detection means for a machine tool is known. The optical detection means comprises a camera attached to a spindle of the machine tool, with which a workpiece to be machined, fixed to a movable table, can be detected. The camera is spaced apart from the spindle housing. A tool is mounted in the spindle itself to perform the workpiece machining. When operating the known workpiece positioning device, a reference workpiece is first fixed to the table. The camera is then moved over the reference workpiece, and its relative reference position is stored.The reference workpiece is then captured by the camera, and the position of a defined feature point on the workpiece is recorded and saved as a reference point image position in an electronic storage device. The workpiece is then fixed to the table. The camera is moved over the workpiece, and the position of a feature point on the workpiece is recorded.

[0010] Page 2 of 40, Kern Microtechnik GmbH. An electronic evaluation unit compares the previously determined relative position and the determined relative reference position, or the position of the workpiece feature point and a reference image position, and calculates the deviation between them. This serves as the basis for correcting the movement performed by the machine tool.

[0011] Information regarding the specific design of the optical detection device, its attachment to the spindle, and the manner in which the recorded images or their electronic signals are transmitted in the workpiece positioning device cannot be found in DE 10 2016 001 337 A1.

[0012] WO 2018 / 019551 A1 discloses a spindle arrangement for a machine tool in which a spindle head projects from a spindle housing. At least one optical element, configured as a light-emitting device or an optical detection device, is arranged near or directly on the spindle head. The optical axis of the optical element and the longitudinal axis of the spindle are spaced apart. Automated replacement of the optical detection device is not provided for in this known spindle arrangement.

[0013] The object of the present invention is to provide an optical detection means for a machine tool that can be easily replaced manually or automatically.

[0014] The problem is solved according to the invention by an optical detection means having the features of claim 1. Further embodiments of the invention are set forth in the dependent claims.

[0015] Specifically, this task is solved by an optical detection device that can be attached to a machine tool. The optical detection device has a

[0016] Page 3 of 40 Kern Microtechnik GmbH

[0017] Camera open to capture at least one image of a workpiece image and / or of an object captured in the workpiece image.

[0018] The camera can be configured in any suitable way. Advantageously, it is configured as an apparatus in which light, particularly in the visible spectrum, or alternatively or cumulatively in the non-visible spectrum, is detected by an image sensor. Due to the relative arrangement of the camera and the object or workpiece holder provided for in the invention, the camera is configured as a reflected-light camera. In principle, a single camera is provided in the optical detection means according to the invention. However, according to a preferred embodiment of the invention, it is possible to provide more than one camera in the optical detection means in order to generate a larger image area or stereoscopic images.

[0019] The optical detection device according to the invention is characterized, firstly, by the fact that the camera is positioned on a holder or, in the case of several cameras, several cameras are positioned on a holder. A receiving means is provided on the holder itself, with which the optical detection device according to the invention can be selectively attached to or removed from a tool holder of the machine tool.

[0020] The mounting device can be designed in any suitable way. For example, it can be designed as a means that enables quick clamping of the optical detection device to the tool holder. According to a particularly preferred embodiment, the mounting device is designed as a hollow shaft cone according to DIN 69893:2006, which advantageously enables automated fastening and removal of the mounting device, and thus of the optical detection device, in and from the tool holder.

[0021] For the purpose of supplying the camera with electrical energy, at least one energy storage device is provided on the holder. The energy storage device is advantageously an electrochemical cell, in particular a rechargeable battery, or a capacitor.

[0022] Page 4 of 40 Kern Microtechnik GmbH trained. Depending on the energy required for operating the camera and other components (to be explained later), the energy storage device consists of one or more cells or capacitors. These are either replaceable or non-replaceable and are mounted on the holder. The energy storage device is electrically connected to the camera. This connection can advantageously be established by at least one electrically conductive connector that is physically connected to the energy storage device on one side and directly or indirectly to the camera on the other.

[0023] With the aid of an electronic means provided on the optical detection device according to the invention, images captured by the camera are converted into data representing images. The corresponding means is advantageously designed as a microcomputer, a microcontroller, or the like.

[0024] The electronic means is operatively connected to a transmitter, which, according to the invention, is also provided on the optical detection means. The data representing the images are sent by means of this transmitter to a receiver located remotely from the optical detection means. The transmitter can be configured in any suitable way to wirelessly transmit the data converted by the electronic means as electromagnetic waves. It is particularly advantageous for the transmitter to be configured as a Bluetooth transmitter. Alternatively or cumulatively, the transmitter can be configured as a Wi-Fi transmitter based on the IEEE 802.11 standards or to use the corresponding wireless network protocols.

[0025] The receiver, located remotely from the sender, is configured to receive the data. In a subsequent step, this data is converted back into images, which are then further processed electronically by means of an electronic device, in particular a microcomputer or microcontroller, and / or made visible to the human eye, especially by means of a display device designed as a monitor. It should be noted that "the receiver" does not refer to just a single individual.

[0026] Page 5 of 40 Kern Microtechnik GmbH

[0027] The term "recipient" should be understood to mean not only a recipient, but also a larger number of recipients, i.e., at least two recipients.

[0028] If the electronic device or transmitter does not have its own power supply, it can advantageously be operatively connected to the previously disclosed energy storage device. The operative connection can, in particular, be wired. Thus, the electronic device and / or the transmitter can be connected to the connector of the energy storage device via one or more wires.

[0029] Advantageously, the features disclosed above provide an optical detection device that can be easily attached to or removed from a tool holder of a machine tool, either manually or automatically. It should also be noted that, if the optical detection device is not located in a machine tool, it can advantageously be positioned in a tool cabinet. Here, too, its placement and removal are advantageously facilitated easily, either manually or automatically.

[0030] Furthermore, the optical detection device according to the invention offers the advantage that very small features of the object under consideration can be located. Contact with the object under consideration is not required. The effort required for positioning the optical detection device is comparatively low, and the processing time for capturing and analyzing the resulting image is fast. Additionally, the object under consideration can advantageously remain clamped in the workpiece holder before, during, and after image acquisition.

[0031] Due to the arrangement of the energy storage device, the electronic means, and the transmitter associated with the camera, the optical detection device according to the invention can advantageously be used autonomously. A connection of the same

[0032] Page 6 of 40 Kern Microtechnik GmbH: Operation of the optical detection device located in the tool holder or a corresponding holder in a tool cabinet is achieved solely via the holder itself. Advantageously, the connection of physical supply lines or similar for operating the optical detection device is not required.

[0033] In principle, the optical axis of the camera provided in the optical detection device can be oriented in any suitable way. In particular, it can be aligned parallel to the longitudinal axis of the holder or parallel to the longitudinal axis of the recording device. However, according to a preferred embodiment, the optical axis of the camera corresponds to the longitudinal axis of the recording device, since this results in a simplified, offset-free arrangement of the camera, or its lens, and the recording device. The aforementioned advantage is adequately achieved if the longitudinal axis of the holder corresponds to the longitudinal axis of the camera or its lens.

[0034] As already described, the optical detection device according to the invention uses incident light to capture an image. To improve image quality, a preferred embodiment provides at least one light source that can emit light at least in the direction of the workpiece holder and / or at least in the direction of the object located in the workpiece holder. The light source can be configured in any suitable way. In particular, it can emit light in the visible or invisible region of the light spectrum, with the camera being configured to capture the light reflected and / or scattered by the tool holder or the object held therein. In a particularly preferred embodiment, the light source can be configured as at least one light-emitting diode. Furthermore, the light source can be positioned at any suitable location on the optical detection device.In a particularly preferred embodiment, the light source consists of a number of light-emitting diodes arranged around the lens of the camera in such a way that their light strikes the workpiece holder and / or the object held in it.

[0035] Page 7 of 40 Kern Microtechnik GmbH

[0036] In principle, the energy storage device can be supplied with energy in any suitable way. In particular, it is possible to provide an electrical interface, especially an electrical connector, on the optical detection device that is connected to the energy storage device. If the optical detection device is located in the tool holder, this interface is either unobstructed or covered to protect against contamination, damage, or the like. However, if the optical detection device is not located in the tool holder but in a position remote from it, especially in a tool cabinet, a corresponding counterpart, especially a plug, equipped with a power source, is connected to the interface, especially in the aforementioned connector, so that the electrical energy supplied by the power source, especially a power supply unit, can flow into the energy storage device.

[0037] Alternatively or cumulatively, the optical detection device has at least one receiver that is operatively connected to the at least one energy storage device. The receiver is initially configured to wirelessly receive energy from a transmitter located remotely from the optical detection device. This advantageously enables wireless energy transmission from an energy source located remotely from the optical detection device, particularly one located in a tool cabinet, to the optical detection device. In particular, it is possible to inductively transmit electrical energy from the power source located remotely from the optical detection device, via a suitable transmitter with antenna or coupling coils, towards a corresponding receiver located in the optical detection device, also with antenna or coupling coil.

[0038] Alternatively or cumulatively, the receiver operatively connected to the at least one energy storage device is configured to wirelessly receive signals from a transmitter located remotely from the optical detection device. These signals are configured to activate and / or deactivate the energy storage device and / or to influence its operation, particularly in a time-controlled manner. Advantageously, the transmitter is configured as a Bluetooth transmitter. Alternatively or cumulatively, it may be provided that

[0039] Page 8 of 40 Kern Microtechnik GmbH the transmitter is designed as a Wi-Fi transmitter based on the standards according to IEEE 802.11 or uses the corresponding wireless network protocols.

[0040] If the commissioning and decommissioning of the optical detection device is not to be effected by a signal of the type described above, a magnetic switch may be provided which closes a circuit when the optical detection device is inserted into a machine tool or tool cabinet, so that at least the electronic device is supplied with power.

[0041] According to a further preferred embodiment, the optical detection means according to the invention comprises at least one transmitter with which signals can be wirelessly transmitted to a receiver located remotely from the optical detection means. Corresponding signals, preferably provided by the electronic means, represent in particular status data of the camera, status data of the light source, status data of the energy storage device, images captured by the camera, or corresponding image data, or the like. The transmitter is particularly advantageously configured as a Bluetooth transmitter. Alternatively or cumulatively, the transmitter can be configured as a Wi-Fi transmitter based on the IEEE 802.11 standards or utilize the corresponding wireless network protocols.

[0042] Alternatively or cumulatively, the optical detection device according to the invention comprises at least one receiver configured to wirelessly receive signals from a transmitter located remotely from the optical detection device. Such signals are, in particular, signals enabling control of the camera, the light source, the energy storage device, and / or the previously disclosed transmitter of the optical detection device. This makes it possible, in particular, to switch the camera on or off, switch the light source on or off, supply or disconnect the entire optical detection device, or a part or all of its parts, from the power supply, convert images captured by the camera into image data, and transmit signals representing image data from the optical detection device towards

[0043] Page 9 of 40 Kern Microtechnik GmbH to send data to a remote receiver, etc. Advantageously, the transmitter is configured as a BluetoothO transmitter. Alternatively or cumulatively, the transmitter can be configured as a Wi-Fi transmitter based on the IEEE 802.11 standards or use the corresponding wireless network protocols. It should be noted that "the receiver" refers not only to a single receiver, but also to a larger number of receivers, i.e., at least two receivers. In particular, it is possible to position one receiver at the machine tool, another receiver at an associated tool cabinet, an additional receiver at a control station, and finally a receiver in a laboratory, etc.

[0044] The optical detection means according to the invention is detachably attached to the tool holder by the mounting means. Connections designed in this way allow for precise alignment of the camera with respect to the workpiece holder or the object located therein. Nevertheless, it may be desirable to perform fine adjustment of the camera. Advantageously, the optical detection means according to the invention is therefore equipped with at least one adjustment means which is configured to adjust at least one section of the holder and / or the camera in at least one spatial direction. The adjustment can comprise a translational movement, a rotational movement, and / or a mixed translational-rotational movement. The movement itself can be performed manually or mechanically, in particular by means of at least one actuator.

[0045] A comparatively simple design of an adjustment means provided in the optical detection means according to the invention is advantageously achieved if it is positioned on the receiving means and the holder in order to adjust the at least one section of the holder relative to the receiving means.

[0046] This applies all the more if, according to a preferred embodiment, the adjusting means is rotatably mounted on the receiving means, extends in the direction of its longitudinal axis and is connected to a corresponding section of the

[0047] Page 10 of 40 Kern Microtechnik GmbH

[0048] The holder has a first adjusting screw connected to the longitudinal axis and / or at least two second adjusting screws rotatably mounted on the receiving element perpendicular to the longitudinal axis and connected to a corresponding section of the holder. In other words, the holder is held in its longitudinal direction on the receiving element by the first adjusting screw. The second adjusting screws are arranged such that they allow slight adjustment of the holder in a plane virtual to the longitudinal axis, in particular its tilting.

[0049] According to a preferred embodiment, the at least one energy storage device extends in the longitudinal direction of the optical detection means. This advantageously results in a space-saving design of the optical detection means that is elongated in the direction of the longitudinal axis of the device.

[0050] In principle, the holder can be made of any suitable material and in any suitable design. For example, the holder can be made of a metallic material, in particular aluminum, a metal alloy, in particular an aluminum alloy, a plastic, a fiber-reinforced composite material, concrete, and / or graphite. Furthermore, it is particularly possible to provide the holder with a number of struts to which and / or between which the previously disclosed components required for the operation of the optical detection device, in particular the energy storage device, the camera, the electronic device, the transmitters, and the receivers, are attached.

[0051] To avoid unwanted, thermally induced deformations of the optical detection means, the holder can be thermally insulated at least in the area of ​​the camera, according to a further preferred embodiment of the optical detection means according to the invention.

[0052] The aforementioned task is also solved by a machine tool that has a workpiece holder and a tool holder, and is therefore

[0053] Page 11 of 40 Kern Microtechnik GmbH is distinguished by the fact that at least one optical detection device of the previously disclosed type is incorporated into the tool holder. The advantages described above apply accordingly.

[0054] The machine tool according to the invention can have any suitable type and / or design. Preferably, the machine tool is designed as a precision machine tool or a high-precision machine tool. Particularly advantageously, the machine tool according to the invention is designed as a traveling column machine tool. In particular, it can be provided that the optical detection means is positioned via the linear axes located on the machine tool. Focusing of the image to be produced can advantageously be carried out in the direction of the axis that corresponds to the longitudinal axis of the optical detection means.

[0055] According to a preferred embodiment, the machine tool according to the invention is characterized in that the receiver, which receives the image-representing data from the camera, is located on the machine tool and is operatively connected to at least one evaluation means and / or at least one display means located thereon. This advantageously makes it possible for an operator of the machine tool to display the images transmitted by the camera on the display device, in particular a monitor. Alternatively or cumulatively, the evaluation means makes it possible to perform an automated or automatic, in particular computer-aided, display of the image itself and any further or supplementary information.The display device is also able to show this information, which may include, in particular, geometric and / or geodetic data of the object shown in the images and / or the workpiece fixture.

[0056] The aforementioned problem is also solved by a tool cabinet comprising at least one optical detection device of the type disclosed above. The advantages described above apply accordingly. Advantageously, this allows for storage

[0057] Page 12 of 40 Kern Microtechnik GmbH created the optical detection device in a suitable environment, in particular a production hall.

[0058] As previously explained, the optical detection device can be provided with an interface connected to the energy storage device, in particular an electrical connector. If the optical detection device is located in the tool cabinet according to the invention, a corresponding counterpart, in particular a plug, equipped with an energy source, is connected to the interface, in particular to the aforementioned connector, so that the electrical energy supplied by the energy source, in particular a power supply unit located in the tool cabinet, can flow into the energy storage device.

[0059] Alternatively or cumulatively, according to a preferred embodiment, the tool cabinet has at least one transmitter that is operatively connected to the at least one energy storage device. The transmitter is initially configured to wirelessly transmit energy to the receiver located in the optical detection device. This advantageously enables wireless energy transmission from an energy source located in the tool cabinet to the optical detection device. In particular, it is thus possible to inductively transmit electrical energy from a corresponding energy source or current source located in the tool cabinet, via a suitable transmitter with antenna or coupling coils, to a corresponding receiver located in the optical detection device, also with antenna or coupling coil.

[0060] Alternatively or cumulatively, the tool cabinet includes at least one transmitter capable of wirelessly sending signals to the receiver located in the optical detection device. These signals are configured to activate and / or deactivate the energy storage device and / or to influence its operation, particularly in a time-controlled manner. Advantageously, the transmitter is designed as a BluetoothO transmitter. Alternatively or cumulatively, the transmitter may be designed based on IEEE standards.

[0061] Page 13 of 40 Kern Microtechnik GmbH

[0062] 802.11 is configured as a Wi-Fi transmitter or uses the corresponding wireless network protocols.

[0063] The problem described above is also solved by a machine tool system comprising at least one machine tool of the type disclosed above and at least one tool cabinet of the type disclosed above. According to a preferred embodiment, at least one optical detection device of the type disclosed above may additionally be provided in the machine tool system. The advantages described above apply accordingly.

[0064] Finally, the problem described above is solved by a method for operating a machine tool or a machine tool system of the type disclosed above, which comprises the following steps:

[0065] 1. Clamping an object to be observed in a workpiece holder;

[0066] 2. Mounting an optical detection device in a tool holder;

[0067] 3. Commissioning the optical detection device by closing a magnetic switch located in the optical detection device or, if such a switch is not present, by receiving a wireless commissioning signal from a receiver located in the optical detection device;

[0068] 4. Providing a power supply to a camera and a transmitter located in the optical detection device;

[0069] 5. Capturing at least one image with the camera, converting the at least one image into data representing it, and sending this data to a receiver located remote from the optical capture device;

[0070] 6. Displaying the images by means of a display device that is located away from the optical detection device;

[0071] 7. Moving the optical detection device by moving that component of the machine tool on which the optical detection device is mounted.

[0072] Page 14 of 40 Kern Microtechnik GmbH is attached and / or - if available - fine-tune, preferably the camera, by means of an adjustment device located in the optical detection device;

[0073] 8. Continue the movement according to the previous step until a desired image is achieved;

[0074] 9. Displaying and / or sending machine tool-related location data corresponding to the desired position to a recipient trained on the machine tool.

[0075] The aforementioned advantages also apply adequately to this method.

[0076] Advantageously, the method according to the invention can be used to determine the distance between two points located on an observed object. The method comprises the following steps:

[0077] 1. Clamping an object to be observed in a workpiece holder;

[0078] 2. Mounting an optical detection device in a tool holder;

[0079] 3. Commissioning the optical detection device by closing a magnetic switch located in the optical detection device or, if such a switch is not present, by receiving a wireless commissioning signal from a receiver located in the optical detection device;

[0080] 4. Providing a power supply to a camera and a transmitter located in the optical detection device;

[0081] 5. Taking an image with the camera, converting the image into data representing it, and sending this data to a receiver located away from the optical detection device;

[0082] 6. Displaying the image by a display device located away from the optical detection device;

[0083] Page 15 of 40 Kern Microtechnik GmbH

[0084] 7. Inputting initial information representing the location data of a first desired point on the displayed image into an electronic calculation tool;

[0085] 8. Moving the optical detection device by moving the component of the machine tool to which the optical detection device is attached and / or - if applicable - fine-tuning, preferably the camera, by means of an adjustment device located in the optical detection device;

[0086] 9. Continue the movement according to the previous step until a second desired point is displayed on the display device;

[0087] 10. Entering a second piece of information, representing the location data of the second desired point on the displayed image, into the electronic calculation tool;

[0088] 11. Calculation of the Euclidean distance between the information representing the location data of the first desired point on the displayed image and the information representing the location data of the second desired point on the displayed image by the electronic calculation tool

[0089] 12. Displaying information representing the Euclidean distance on the display device.

[0090] Alternatively or cumulatively, the angle between two lines (vectors) selected on the observed object can also be advantageously determined using the method according to the invention. For this purpose, the respective lengths of the two lines (vectors) are determined by performing steps 7 to 11 disclosed above for determining the distance between two points for a first line (as previously described) and, by repeating steps 7 to 11, for a second line. After calculating the Euclidean distance with respect to the first line and the second line, the arccosine of the scalar product of the two lines (vectors), divided by the product of their lengths, is calculated by the computational device. The value thus obtained, representing the angle between the two lines, is then displayed on the display device.

[0091] Page 16 of 40 Kern Microtechnik GmbH

[0092] Alternatively or cumulatively, the center and radius of a circle can also be advantageously determined using the method according to the invention based on three points selected on the observed object. The method comprises the following steps:

[0093] 1. Clamping an object to be observed in a workpiece holder;

[0094] 2. Mounting an optical detection device in a tool holder;

[0095] 3. Commissioning the optical detection device by closing a magnetic switch located in the optical detection device or, if such a switch is not present, by receiving a wireless commissioning signal from a receiver located in the optical detection device;

[0096] 4. Providing a power supply to a camera and a transmitter located in the optical detection device;

[0097] 5. Taking an image with the camera, converting the image into data representing it, and sending this data to a receiver located away from the optical detection device;

[0098] 6. Displaying the image by a display device located away from the optical detection device;

[0099] 7. Inputting initial information representing the location data of a first desired point on the displayed image into an electronic calculation tool;

[0100] 8. Moving the optical detection device by moving the component of the machine tool to which the optical detection device is attached and / or - if applicable - fine-tuning, preferably the camera, by means of an adjustment device located in the optical detection device;

[0101] 9. Continue the movement according to the previous step until a second desired point is displayed on the display device;

[0102] 10. Entering a second piece of information, representing the location data of the second desired point on the displayed image, into the electronic calculation tool;

[0103] Page 17 of 40 Kern Microtechnik GmbH

[0104] 11. Continue the movement according to the previous step until a third desired point is displayed on the display device;

[0105] 12. Entering a third piece of information, representing the location data of the third desired point on the displayed image, into the electronic calculation tool;

[0106] 13. Calculating information representing the center and / or radius of the desired circle using an electronic calculation tool based on the general equation of a circle;

[0107] 14. Displaying the information representing the center point and / or radius of the desired circle on the display device.

[0108] The aforementioned calculation tool can correspond to the evaluation tool located in the machine tool 100.

[0109] According to a preferred embodiment of the method, the previously determined data are provided, in particular via the Internet. This allows them to be advantageously made available at any desired location and at any desired time.

[0110] It may also be advantageously provided that the data determined by the previously disclosed calculation tool are further processed electronically and / or output as input data to other calculation tools.

[0111] It is understood that the previously disclosed method can also be used with the previously disclosed machine tool system if the machine tool system includes a previously disclosed machine tool.

[0112] According to the invention, a computer program product for controlling a machine tool or a machine tool system of the previously disclosed

[0113] Page 18 of 40 Kern Microtechnik GmbH provides for a method containing instructions which, when executed on a computer, cause it to carry out a method of the previously disclosed type.

[0114] Further features and advantages of the invention are illustrated in the accompanying, non-limiting embodiments of the present invention with reference to the accompanying, not-to-scale drawing.

[0115] Fig. 1 shows a symbolic and simplified view of a machine tool system according to the invention.

[0116] Fig. 2 shows a simplified side view of an optical detection device according to the invention.

[0117] Fig. 3 shows a perspective view of an optical detection device without a housing,

[0118] Fig. 4 shows a simplified side view of part of the optical detection device shown in Fig. 3, and

[0119] Fig. 5 shows a simplified side view of part of an alternative optical detection device, and

[0120] Fig. 6 shows a flowchart of a method for operating a machine tool according to the invention.

[0121] Figure 1 is a symbolic and simplified view of a machine tool system 1 according to the invention, which includes a machine tool 100 according to the invention.

[0122] Page 19 of 40 Kern Microtechnik GmbH and a tool cabinet 200 according to the invention. The machine tool 100 is designed as a high-precision machine tool in a traveling column design according to the embodiment shown here. It comprises a machine column 105, a cross slide 110 movable relative to the column in a transverse direction or linear axis Q, a longitudinal slide 115 movable relative to the cross slide 110 in a longitudinal direction or linear axis L, and a vertical slide 120 movable relative to the longitudinal slide 115 in a vertical direction or linear axis H.

[0123] The transverse direction Q, according to a convention chosen here, runs parallel to an x-axis of a known Cartesian coordinate system and thus out of the plane of Figure 1. The longitudinal direction L, according to a convention chosen here, runs parallel to a y-axis of the Cartesian coordinate system and thus in the horizontal direction of Figure 1. The vertical direction H, according to a convention chosen here, runs parallel to the z-axis of the Cartesian coordinate system and thus in the vertical direction of Figure 1. Therefore, the transverse slide 110, the longitudinal slide 115, and the vertical slide 120 can be moved in directions orthogonal to each other.

[0124] At the end of the vertical slide 120 facing the machine stand 105, there is a tool holder 125 on which an optical detection means 300 according to the invention is mounted. The longitudinal axis L1 of the optical detection means 300 corresponds to the axis of rotation D1 about which the tool holder 125 is rotatably mounted and running parallel to the z-axis.

[0125] The machine stand 105, in turn, has a workpiece holder 130 in which an object 135 to be viewed by the optical detection means 300 is held. According to the present embodiment, this object 135 is a workpiece whose surface 140 is to be optically detected by the optical detection means 300.

[0126] Page 20 of 40 Kern Microtechnik GmbH

[0127] Therefore, the high-precision machine tool 100 of this embodiment is designed as a 5-axis high-precision machine tool, which is additionally located in an enclosure 150, which can be designed in a cabinet-like manner.

[0128] To enable linear movement of the cross slide 110 relative to the machine frame 105, a linear drive and guide bearing 160-1 is provided on the cross slide. To enable linear movement of the longitudinal slide 115 relative to the cross slide 110, a further linear drive and guide bearing 160-2 is provided on the longitudinal slide 115. Finally, according to this embodiment, a last linear drive and guide bearing 160-3 is provided on the longitudinal slide 115 and the vertical slide 120.

[0129] Outside the enclosure 150, and attached to it, a display device 165 designed as a monitor is arranged, with which information is displayed. This information reflects, for example, the status of the machine tool 100, the tool cabinet 200, the optical detection device 300, or the object 135 located in the workpiece holder 130.

[0130] Also located outside the housing 150, and attached to it, is an input device 170 designed as a keyboard, by means of which information can be entered. This information serves, for example, to control or regulate the machine tool 100, the tool cabinet 200, or the optical detection device 300. In particular, this information serves to adjust the cross slide 110, the longitudinal slide 115, and the vertical slide 120.

[0131] For the purpose of wireless communication between at least some of the components located in and on the machine tool 100, for example the display means 165 and the input means 170, and the optical detection means 300 located in the tool holder 125, a transmitter 175 is installed on the machine tool 100.

[0132] Page 21 of 40 Kern Microtechnik GmbH provides for signals to be sent to a receiver located in the optical detection device 300, which is not shown here.

[0133] Furthermore, for the purpose of wireless communication between at least this part of the components located in and on the machine tool 100, for example the display means 165 and the input means 170, and the optical detection means 300 located in the tool holder 125, a receiver 180 is provided on the machine tool 100, from which signals can be received by a transmitter located in the optical detection means 300 (not shown here).

[0134] According to this embodiment, the tool cabinet 200 contains two optical detection devices 300. These devices have different optics but are otherwise of the same construction and function. It is understood, however, that there may also be no optical detection device 300 or more than two optical detection devices 300 in the tool cabinet 200. The optical detection devices 300 can be removed from the tool cabinet 200 manually or automatically by means of an exchange mechanism 185 (shown here only symbolically) and clamped in the tool holder 125. Conversely, it is possible to remove the optical detection device 300 from the tool holder 125 manually or automatically by means of the exchange mechanism 185 and store it in the tool cabinet 200.

[0135] While the structure of the optical detection devices 300 will be explained in the course of the following description, it should be mentioned at this point that a transmitter 205 is provided on the tool cabinet 200. This transmitter allows electrical energy to be transmitted wirelessly, i.e., by induction, from a power source 210 located in the tool cabinet 200 to one or both of the optical detection devices 300, as symbolized by the two lightning-shaped double arrows. Furthermore, the transmitter 205 is capable of transmitting signals to one or both of the optical detection devices 300. These signals serve, for example, to initiate a switching-on process or a

[0136] Page 22 of 40 Kern Microtechnik GmbH

[0137] Switch-off process of the optical detection device 300 or optical detection devices 300.

[0138] The tool cabinet 200 also includes a receiver 215, which can wirelessly receive signals emitted by an optical detection device 300. These signals can, for example, represent information about the state of the optical detection device 300 or its components, in particular an energy storage device located therein (not shown here).

[0139] The transmitters 205 and receivers 215 located in the tool cabinet 200 are in operative communication with the receiver 180 and the transmitter 175 respectively, according to the embodiment shown here, so that they can exchange data with each other.

[0140] Finally, the tool cabinet 200 contains two cleaning devices 220, with which the optical lenses of the optical detection means 300, which are not shown here, can be cleaned.

[0141] Figure 2 shows a simplified side view of an optical detection device 300 according to the invention. The optical detection device 300 has a receiving element 305, which is designed as a hollow conical shaft according to DIN 69893:2006. The receiving element 305 is detachably attached in the tool holder 125 of the machine tool 100 (not shown in this figure) in a manner known per se. A camera 315 (shown symbolically) is housed in a housing 310 of the optical detection device 300. The lens 320 of the camera is not covered by the housing 310 but is instead free to capture an image of the surface 140 of the object 135 located in the workpiece holder 130, as symbolized by arrow B. To improve the image quality, the surface 140 can be illuminated, as symbolized by arrows F.The light F is emitted by a light source 325, which has light-emitting diodes arranged in a ring around the longitudinal axis L1 of the optical detection means 300.

[0142] Page 23 of 40 Kern Microtechnik GmbH

[0143] Figure 3 shows a perspective view of the optical detection device 300 depicted in Figure 2, without its housing 310. Adjoining the receiving device 305, viewed in the longitudinal direction L1, is a substantially plate-shaped holder 330, from which a series of struts 335 extending in the longitudinal direction L1 (of which only one strut 335 is visible due to the chosen illustration). The end of the camera 315 furthest from the lens 320 is attached to the holder 330. In Figure 3, on the right, a circuit board 345 comprising an electronic device 340 is attached to the optical detection device 300. The electronic device 340, designed as a microcomputer, is configured to process the images captured by the camera 315, for example, to convert them into data and output them to a transmitter 350 located on the optical detection device 300.The transmitter 350 is in operative communication with at least one corresponding receiver 180 of the machine tool 100 and / or at least one receiver 215 of the tool cabinet 200.

[0144] Furthermore, the electronic device 340 is configured to process data sent to a receiver 355 and to output this data, for example, to the camera 315 and / or the light source 325. The receiver 355 is operatively connected to at least one corresponding transmitter 175 of the machine tool 100 and / or at least one transmitter 205 of the tool cabinet 200.

[0145] The transmitter 350 and the receiver 355 can, even if this is not shown in this figure, be in operative communication with other receivers 355 or transmitters 350 of other optical detection means 300.

[0146] Also mounted on the circuit board 345 is a receiver 360, which can receive electrical energy inductively emitted by the transmitter 205 of the tool cabinet. The receiver 360 is controlled or regulated by the electronic device 340 and is operatively connected to an energy storage device 365, which supplies the electronic device 340, the transmitter 350, the receiver 355, the receiver 360, the camera 315 and the light source 325 with electrical energy.

[0147] Page 24 of 40 Kern Microtechnik GmbH

[0148] The energy storage device 365 comprises a series of accumulators 370, arranged in the form of electrochemical cells and aligned parallel to the longitudinal direction L1 and radially around it (without forming a complete circle). These accumulators are mounted in an energy storage device 375. Due to the perspective chosen here, only two accumulators 370 are visible, but their number, size, shape, etc., are adapted to their required electrical capacity. The individual accumulators are electrically interconnected by connectors 380, as is known per se.

[0149] In principle, commissioning and decommissioning can be effected by a signal received by the receiver 355 and processed accordingly by the electronic device 340. In this case, the electronic device 340 and the receiver 355 are always in operational readiness. However, according to the embodiment shown here, this is unnecessary because a magnetic switch 385 is provided which closes a circuit when the optical detection device 300 is inserted into the machine tool 100 or the tool cabinet 200, so that at least the electronic device 340 is supplied with power.

[0150] In Fig. 4, the optical detection device 300 shown in Fig. 3 is shown again in simplified form in side view, whereby the representation of all electronic components, for example the circuit board 345, the electronic device 340, the transmitter 350, the receiver 355 and the receiver 360, as well as the accumulators 370, has been omitted for the sake of clarity.

[0151] As can be seen, the energy storage device 375 has a series of chambers 390 distributed radially around the longitudinal axis L1, with the chambers 390 not forming a complete circle around the longitudinal axis L1. This allows the attachment of a support 395 to which, for example, the circuit board 345 and the light source 325 can be mounted. The support 395 also extends essentially in the longitudinal direction L1 of the optical detection device 300, so that the latter has a comparatively narrow design.

[0152] Page 25 of 40 Kern Microtechnik GmbH

[0153] Figure 5 shows a simplified side view of part of an alternative optical detection device 300. In addition to the elements of the optical detection device 300 already described, this device includes an adjustment means 400, with which a section of the holder 330 or a position of the camera 315 arranged on the holder 330 can be fine-tuned in at least one of the spatial directions x, y, or z. For this purpose, the adjustment means 400 is positioned and configured on the receiving device 305 and the holder 330 such that at least one section of the holder 330 is adjusted relative to the receiving device 305.

[0154] The adjusting device 400 has a first adjusting screw 405 extending in the longitudinal direction L1. The first adjusting screw 405 has a head 410 at one end, which, in a manner known per se, has a tool holder 410, designed as an internal hexagon socket according to the embodiment shown here. The side of the head facing the camera 315 rests on a shoulder 415 formed in an interior 420 of the holder 305. A first threaded section 425 of the first adjusting screw 405, projecting from the head 405 towards the camera 315, is screwed into and through a corresponding threaded section 430 of the holder 305. Its second threaded section 435, extending in the longitudinal direction L1, is screwed into a corresponding threaded section 440 of the holder 330.The screw connection is made in such a way that - viewed in the longitudinal direction L1 - a distance d is formed between the threaded section 430 of the receiving means 305 and the threaded section 440 of the holder 330.

[0155] The adjusting means 400 further comprises, according to the embodiment shown here, four (of which only two are shown due to the perspective chosen in Fig. 5) second adjusting screws 445 evenly distributed around the circumference of the threaded section 430 of the receiving means 305, the respective ends of which, positioned in the direction of the longitudinal axis L1, bear against the threaded section 440 of the holder 330. The second adjusting screws 445 are designed as set screws, the external threads of which are screwed into corresponding internal threads of the threaded section 440. By appropriately adjusting the screw connection of the second

[0156] Page 26 of 40 Kern Microtechnik GmbH

[0157] The holder 330 is finely adjusted relative to the receiving means 305 by adjusting screws 445 in a direction orthogonal to the longitudinal axis L1.

[0158] It should be noted that all or individual transmitters and their corresponding receivers in the previously described embodiments are configured to perform wireless signal transmission. For this purpose, they are designed as BluetoothO transmitters or BluetoothO receivers, or as transmitters or receivers that use wireless network protocols according to the IEEE 802.11 standards.

[0159] Figure 6 shows a flowchart according to a method for operating a machine tool 100 according to the invention. In the method, in a first step S1, an object 135 to be observed is clamped in a workpiece holder 130.

[0160] In a subsequent step S2, an optical detection device 300 is attached in a tool holder 125.

[0161] By attaching the optical detection device 300, a magnetic switch 385 is closed or, if such a switch is not present, a wireless commissioning signal is received from a receiver 355 located in the optical detection device 300, so that in a third step S3 the optical detection device 300 is put into operational readiness.

[0162] Once the optical detection device 300 is ready for operation, a camera 315 and a transmitter 350 located in the optical detection device 300 are supplied with power in a fourth step S4.

[0163] Page 27 of 40 Kern Microtechnik GmbH

[0164] In a next step, the camera 315 records S5 images, which are converted into data by an electronic means 340 and sent by means of the transmitter 350 to a receiver 180 located away from the optical detection means 300.

[0165] This receiver 180 is located, for example, on the machine tool 100, which is set up in such a way that the received images are displayed by a display device 165 designed as a monitor according to a sixth step S6.

[0166] Depending on the displayed images, the optical scanning device 300 is moved in a subsequent step S7 by moving the component of the machine tool 100 to which the optical scanning device 300 is attached. For example, if the optical scanning device 300 is mounted on a vertical slide 120 of the machine tool 100, it is moved to a desired position in the xy-plane by appropriately moving the cross slide 110 and longitudinal slide 115 located on the machine tool 100 above the object 135. By moving the optical scanning device 300 in the z-direction via the vertical slide 120, the camera 315 is focused. The movement of the optical scanning device 300 in the x-direction, y-direction, and z-direction is carried out until a desired image is displayed (query S8).

[0167] If the desired image is not available, the movement of the optical detection device 300 in the x-direction, y-direction and / or z-direction is continued and / or - if available - a fine adjustment is made by means of the adjustment device 400 (step S7).

[0168] If, however, a desired image is available, the optical detection device 300 is also in a desired position. Machine tool-related location data representing this position are displayed in step S9 via suitable devices on the machine tool 100 and / or via the transmitter 350.

[0169] Page 28 of 40 Kern Microtechnik GmbH sent to the machine tool 100, received by the receiver 180 located there, further processed and displayed on the display device 165.

[0170] It should be noted that the optical sensing device 300 in the machine tool 100 can also be used to determine the distance between two points located on an observed object 135. For this purpose, the object 135 is clamped in a workpiece holder 130. The optical sensing device 300 is attached in a tool holder 125. The optical sensing device 300 is activated by closing a magnetic switch 385 located within it or, if such a switch is not present, by receiving a wireless activation signal from a receiver 355 located within the optical sensing device 300. As soon as the optical sensing device 300 is ready for operation, a camera 315 and a transmitter 350 located within the optical sensing device 300 are powered on.The camera 315 captures an image, which is converted into data by an electronic means 340 and transmitted by the transmitter 350 to a receiver 180 located remotely from the optical detection means 300. According to the present embodiment, the receiver 180 is located on the machine tool 100. The image is then displayed by a display means 165, for example, a monitor.

[0171] In the next step, the location data of a first desired point on the displayed image, or the corresponding information, are entered into an electronic processing device, e.g., a computer. Subsequently, the optical detection device 300 is moved by a suitable means, as already explained with reference to Fig. 6. The movement continues until a desired second point is displayed on the display device 165. Once this second point is reached, its location data, or corresponding representative information, is entered into the electronic processing device. This device calculates the Euclidean distance between the first desired point on the displayed image and the second desired point. The Euclidean distance is then displayed on the display device 165.

[0172] Page 29 of 40 Kern Microtechnik GmbH

[0173] Alternatively or cumulatively, the angle between two lines or vectors selected on the observed object 135 can also be determined using the method according to the invention. For this purpose, the respective lengths of the two lines or vectors are determined by performing the previously disclosed steps for determining the distance between two points for a first line (as previously described) and, by repeating these steps, for a second line. After calculating the Euclidean distance between the first and second lines, the arccosine of the scalar product of the two lines or vectors, divided by the product of their lengths, is calculated by the computational device. The value thus obtained, representing the angle between the two lines, is then displayed on the display device 165.

[0174] Alternatively or cumulatively, the center point and radius of a circle can also be advantageously determined using the method according to the invention based on three points selected on the observed object. For this purpose, the object 135 is clamped in a workpiece holder 130. The optical detection device 300 is mounted in a tool holder 125. The optical detection device 300 is activated by closing a magnetic switch 385 located within it or, if such a switch is not present, by receiving a wireless activation signal from a receiver 355 located within the optical detection device. As soon as the optical detection device 300 is ready for operation, a camera 315 and a transmitter 350 located within the optical detection device 300 are powered on.The camera 315 captures an image, which is converted into data by an electronic means 340 and transmitted by the transmitter 350 to a receiver 180 located remotely from the optical detection means 300. According to the present embodiment, the receiver 180 is located on the machine tool 100. The image is then displayed by a display means 165, for example, a monitor.

[0175] In the next step, the location data of a first desired point on the displayed image, or the corresponding information, is entered into an electronic processing device, e.g., a computer. Subsequently, the optical detection device 300 is moved by a suitable means, as shown with reference to Fig.

[0176] Page 30 of 40 Kern Microtechnik GmbH

[0177] As already explained in Figure 6, the movement continues until a desired second point is displayed on the display 165. Once this second point is reached, its location data or corresponding representative information is entered into the electronic calculation unit. The optical detection device 300 is then moved further, as already explained with reference to Figure 6. The movement continues until a desired third point is displayed on the display 165. Once this third point is reached, its location data or corresponding representative information is entered into the electronic calculation unit. In this unit, the center and / or radius of the desired or sought circle are calculated using the general equation of a circle. The center and / or radius of the desired circle thus obtained, or its representative information, are then displayed on the display 165.

[0178] The aforementioned calculation tool can correspond to the evaluation tool located in the machine tool 100.

[0179] It is understood that the data representing the desired position and / or the images captured by the camera 315 can also be stored, processed, or displayed at a location other than the machine tool 100 itself. For example, the data can be made available via the internet at any desired location and at any desired time, as symbolized by S10 as an optional step in Fig. 6.

[0180] Reference symbol list:

[0181] 1 machine tool system

[0182] 100 machine tools

[0183] 105 machine stands

[0184] Page 31 of 40 Kern Microtechnik GmbH

[0185] 110 cross slides

[0186] 115 longitudinal slides

[0187] 120 vertical slides

[0188] 125 Tool holder

[0189] 130 workpiece holder

[0190] 135 Item

[0191] 140 surface

[0192] 150 Enclosure

[0193] 160-1 linear drive and guide bearing

[0194] 160-2 linear drive and guide bearing

[0195] 160-3 linear drive and guide bearing

[0196] 165 Display devices

[0197] 170 input devices

[0198] 175 transmitters on machine tools

[0199] 180 receivers on machine tool

[0200] 185 Exchange mechanism

[0201] 200 tool cabinet

[0202] 205 transmitters in the tool cabinet

[0203] 210 Energy source in the tool cabinet

[0204] 215 receivers in the tool cabinet

[0205] 220 Cleaning device

[0206] Page 32 of 40 Kern Microtechnik GmbH

[0207] 300 optical detection devices

[0208] 305 recording devices

[0209] 310 cases

[0210] 315 Camera

[0211] 320 lens

[0212] 325 light bulbs

[0213] 330 holders

[0214] 335 strut

[0215] 340 electronic means

[0216] 345 circuit board

[0217] 350 transmitters

[0218] 355 receivers (signals)

[0219] 360 receivers (energy)

[0220] 365 Energy Storage

[0221] 370 accumulators

[0222] 375 Energy storage capacity

[0223] 380 connector

[0224] 385 magnetic switches

[0225] 390 Chamber

[0226] 395 T-beams

[0227] 400 adjustment devices

[0228] 405 first adjusting screw

[0229] 410 Tool holding devices

[0230] Page 33 of 40 Kern Microtechnik GmbH

[0231] Paragraph 415

[0232] 420 interior

[0233] 425 first thread section

[0234] 430 thread section 435 second thread section

[0235] 440 thread section

[0236] 445 second first adjusting screw

[0237] Image B D1, D2, D3 Axes of rotation

[0238] F light

[0239] H Vertical direction

[0240] L Longitudinal direction

[0241] L1 Longitudinal axis of the optical detection device Q Transverse direction d Distance x, y, z Cartesian coordinates

[0242] Page 34 of 40

Claims

Kern Microtechnik GmbH Patent claims 1. Optical detection device (300) which is designed to be attached to a machine tool (100) and which has a camera (315) to capture at least one image of a workpiece holder (130) of the machine tool (100) and / or an object (135) held in the workpiece holder (130), characterized by - a holder (330) on which the camera (315) is positioned, - a holding device (305) positioned on the holder (330), which is designed to be selectively attached to or removed from a tool holder (125) of the machine tool (100), - at least one energy storage device (365) positioned on the holder (330) which is in operative connection with the camera (315), - at least one electronic means (340) configured to convert images captured by the camera (315) into image-representing data, and - at least one transmitter (350) configured to send the image-representing data from the camera (315) to a receiver (180, 215) located away from the optical detection means (300).

2. Optical detection means (300) according to claim 1 , characterized in that the optical axis of the camera (315) corresponds to the longitudinal axis (L1) of the recording means (305).

3. Optical detection means (300) according to claim 1 or 2, characterized by at least one light source (325) which is configured to emit light (F) at least in the direction of the workpiece holder (130) and / or at least in the direction of the object (135) located in the tool holder (130). Page 35 of 40 Kern Microtechnik GmbH 4. Optical detection means (300) according to one of the preceding claims, characterized by at least one receiver (360) operatively connected to the at least one energy storage device (365), which is configured to wirelessly receive energy from a transmitter (175, 205) located away from the optical detection means (300).

5. Optical detection means (300) according to one of the preceding claims, characterized by at least one transmitter (350) configured to wirelessly send signals to a receiver (175, 215) located remotely from the optical detection means (300), and / or a receiver (355) configured to wirelessly receive signals from a transmitter (175, 205) located remotely from the optical detection means (300).

6. Optical detection means (300) according to one of the preceding claims, characterized by at least one adjustment means (400) which is configured to adjust at least one section of the holder (330) and / or the camera (315) in at least one spatial direction (x, y, z).

7. Optical detection means (300) according to claim 6, characterized in that the adjustment means (400) is positioned on the receiving means (305) and the holder (330) to adjust the at least one section of the holder (330) relative to the receiving means (305).

8. Optical detection means (300) according to claim 7, characterized in that the adjusting means (400) has a first adjusting screw (405) rotatably mounted on the receiving means (305), extending in the direction of its longitudinal axis (L1) and operatively connected with a corresponding section of the holder (330) and / or at least two second adjusting screws (445) rotatably mounted on the receiving means (305) orthogonally to the longitudinal axis (L1), spaced apart from each other and operatively connected with a respective corresponding section of the holder (330). Page 36 of 40 Kern Microtechnik GmbH 9. Optical detection means (300) according to one of the preceding claims, characterized in that the at least one energy storage device (365) extends parallel to the longitudinal axis (L1) of the optical detection means (300).

10. Optical detection means (300) according to one of the preceding claims, characterized in that the holder (330) is thermally insulated at least in the area of ​​the camera (315).

11. Machine tool (100), comprising a workpiece holder (130) and a tool holder (125), characterized in that at least one optical detection means (300) according to one of the preceding claims is included in the tool holder (125).

12. Machine tool (100) according to claim 11, characterized in that the receiver (180) representing the image data of the camera (315) is located on the machine tool (100) and is operatively connected to at least one evaluation means and / or at least one display means (165) located thereon.

13. Tool cabinet (200) which is equipped to hold tools at least temporarily, characterized by at least one optical detection means (300) according to one of claims 1 to 10.

14. Tool cabinet (200) according to claim 13, characterized by at least one transmitter (205) which is configured to wirelessly transmit energy to the at least one energy storage device (365) of the optical detection means (300) and / or to send signals to a receiver (355, 360) located in the optical detection means (300). Page 37 of 40 Kern Microtechnik GmbH 15. Machine tool system (1), characterized by at least one machine tool (100) according to one of claims 11 to 12 and at least one tool cabinet (200) according to one of claims 13 to 14.

16. Method for operating a machine tool (100) according to one of claims 11 to 12 or for operating a machine tool system (1) according to claim 15, characterized by the following steps: 16.1 Clamping (S1) an object to be observed (135) in a workpiece holder (130); 16.2 Attaching (S2) an optical detection device (300) in a tool holder (125); 16.3 Commissioning (S3) of the optical detection device (300) by closing a magnetic switch (385) located in the optical detection device (300) or, if such a switch is not present, by receiving a wireless commissioning signal from a receiver (355) located in the optical detection device (300); 16.4 Providing (S4) a power supply to a camera (315) located in the optical detection device (300) and a transmitter (350) located in the optical detection device (300); 16.5 Capturing at least one image by the camera (315), converting the at least one image into data representing it and sending (S5) this data to a receiver (180) located away from the optical detection means (300); 16.6 Display (S6) the images from a display device (165) that is located away from the optical detection device (300); 16.7 Moving (S7) the optical detection means (300) by moving the component of the machine tool (100) to which the optical detection means (300) is attached, and / or - if available - fine-tuning by means of an adjustment means (400); 16.8 Continue (S8) the movement according to the previous step (S7) until a desired image is obtained; Page 38 of 40 Kern Microtechnik GmbH Displays (S9) the achieved and desired position-related location data of the machine tool and / or sends the same to a recipient (180) trained on the machine tool (100). Page 39 of 40

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