Sawing apparatus and method

Abstract

The present invention relates to a saw apparatus 10, in particular a table circular saw or cross-cut saw, which has a workpiece rest 2 for the placement of a workpiece 1, a saw blade 3 and an electric actuator device 11 for adjusting the saw blade position of the saw blade 3 relative to the workpiece rest 2), wherein the electric actuator device 11 has a first electric actuator 21 which has a first rotor 31 and is used for adjusting the saw blade position in a first degree of freedom 41, in particular the saw blade angle, and the saw apparatus 10 is configured to detect the current saw blade position of the saw blade 3 based on a first rotor movement of the first rotor 31.

Description

[Technical field]

[0001] The present invention relates to a sawing apparatus, in particular a table circular saw or a cross-cut saw, which sawing apparatus comprises: A processing material placement portion for placing the processing material; Saw blades, as well as and an electrical actuator device for adjusting the saw blade position relative to the workpiece rest. In the saw device, The electric actuator device comprises a first electric actuator, which has a first rotor and is used for adjusting the saw blade position in a first degree of freedom, in particular the saw blade angle. [Background technology]

[0002] US Pat. No. 5,399,433 describes a movable table circular saw having an electric actuator for the movement of the saw blade position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 065040A1 Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE DISCLOSURE It is an object of the present invention to provide an improved sawing device. [Means for solving the problem]

[0005] This problem is solved by a saw device according to claim 1. The saw device is configured to determine a current saw blade position of the saw blade on the basis of a first rotor movement of the first rotor. Effect of the Invention

[0006] The detected saw blade position may be used, for example, by the saw device to display the current saw blade position to a user and / or For example, to move the saw blade to a predefined saw blade position using a position control device or a position adjustment device based on the detected saw blade position. can be used for.

[0007] The first rotor movement is, for example, one step or one revolution of the first rotor and is detected expediently within the range of operation of the electric first actuator, for example based on the voltage and / or current of this electric first actuator. Since the saw blade position is determined on the basis of the first rotor movement, it is expediently not necessary to provide a separate position sensor for the saw blade position.

[0008] Advantageous further configurations are the subject of the dependent claims.

[0009] The invention further relates to a method for operating a saw device, the method comprising: detecting a current saw blade position based on a first rotor movement; The steps are as follows.

[0010] Further exemplary details as well as exemplary embodiments are described below in conjunction with the figures. [Brief description of the drawings]

[0011] [Figure 1] FIG. [Diagram 2] FIG. 2 is a schematic side view of the saw apparatus; [Diagram 3] FIG. 2 is a schematic front view of the saw apparatus; [Figure 4] 2 is a schematic diagram of a saw apparatus according to an alternative embodiment; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] In the following description, reference should be made to the mutually orthogonally oriented directions x, y and z drawn in the figures, the x and y directions being horizontal directions and the z direction being vertical.

[0013] 1 shows an exemplary embodiment of a saw apparatus 10. The saw apparatus 10 is exemplarily configured as a table circular saw. Alternatively, the saw apparatus 10 can also be configured differently, for example as a cross-cut saw. An exemplary embodiment of the saw apparatus 10 is shown in FIG.

[0014] The sawing device 10 is in particular configured as a semi-stationary sawing device, which is a sawing machine that is stationary positioned on a base for sawing the workpiece 1 and can be carried by an individual user.

[0015] The saw device 10 has a workpiece rest 2, which is in particular configured as a workpiece rest surface. In the working position of the saw device 10, the workpiece rest 2 is aligned normal to the z direction.

[0016] The saw device 10 comprises a saw blade 3. The saw blade 3 is aligned with its saw blade plane parallel to the x direction. Expediently, the cutting direction of the saw blade 3 extends in the x-direction. Expediently, the saw blade 3 projects upwards from the workpiece rest 2 through an opening provided in the workpiece rest 2 and / or downwards into this workpiece rest.

[0017] The sawing device 10 expediently comprises a support structure 4, which by way of example has a basic configuration in the form of a rectangular parallelepiped. The support structure 4 expediently provides an outer casing for the sawing device 10. Advantageously, the upper side of the support structure 4 provides the workpiece rest 2. In the working position, the saw device 10 stands on a base by means of the lower side of the support structure 4.

[0018] The saw device 10 expediently comprises an operating device 5, via which a user can operate the saw device 10. The operating device 5 is, by way of example, arranged on a peripheral side of the support structure 4. The operating device 5 comprises one or more operating elements, which can be operated by the user in order to operate the saw device 10. For example, the operating device comprises a rotary-push actuator 6 and / or one or more push buttons 7. Advantageously, the operating device 5 further comprises a display unit 8.

[0019] FIG. 2 shows a schematic side view of saw apparatus 10, and FIG.

[0020] The saw device 10 comprises an electric saw blade drive unit 9, which is also referred to as a drive electric motor, which is used to bring the saw blade 3 into a sawing rotational movement, in which the workpiece 1 can be sawed by means of the saw blade 3. The saw blade rotational movement takes place in particular about a rotation axis which is aligned perpendicular to the plane of the saw blade.

[0021] The saw device 10 comprises an electric actuator device 11 for adjusting the saw blade position of the saw blade 3 relative to the workpiece rest 2. By means of the electric actuator device 11, the saw blade 3 can be positioned in its saw blade position relative to the workpiece rest 2, in particular in two degrees of freedom.

[0022] Advantageously, the electric actuator device 11 comprises a first actuator 21. This first actuator 21 comprises a first rotor 31. For example, the first actuator 21 comprises a first electric motor and the first rotor is part of this first electric motor. The first actuator 21 is used for adjusting the saw blade position in a first degree of freedom 41, in particular the saw blade angle. The first degree of freedom 41 is, by way of example, a rotational degree of freedom, in particular about a pivot axis extending parallel to the cutting direction of the saw blade 3, in particular parallel to the x-direction. The first actuator 21 is formed to cause a pivoting movement of the saw blade 3 along the first degree of freedom 41. The first actuator 21 is exemplarily configured as a first spindle drive and advantageously comprises a first motion element 61, which is placed in a first linear motion state by the first rotational motion of the first rotor 31. The first rotational movement is illustratively performed about a rotational axis oriented in the y direction. The first motion element 61 is kinematically connected to the saw blade 3 such that a first linear motion of the first motion element 61 can cause a pivoting motion of the saw blade 3 along the first degree of freedom 41. For example, the first actuator 21 comprises a first spindle 51, which is placed in a first spindle rotational motion state by a first rotational motion of the first rotor 31, which causes a first linear motion of a first motion element 61. The first motion element 61 is configured, for example, as a spindle nut. Alternatively, it is possible for the first motion element 61 to be configured as a spindle, which is placed in a first linear motion state by the first rotational motion of the first rotor 31.

[0023] The saw device 10, for example, comprises a swivel device 12, which for example comprises the saw blade 3, the saw blade drive unit 9 and, expediently, a second actuator 22. The swivel device 12 is supported so as to be rotatable about a pivot axis which generally extends parallel to the x-direction. The pivoting device 12 is movably connected to a first movement element 61, such that a first linear movement of this first movement element 61 can cause a pivoting movement of the pivoting device 12, and thus the saw blade 3 is moved, in particular pivoted, along the first degree of freedom 41.

[0024] Advantageously, the electric actuator device 11 further comprises a second electric actuator 22. This second actuator 22 comprises a second rotor 32. For example, the second actuator 22 comprises a second electric motor and the second rotor 32 is part of this second electric motor. The second actuator 22 is used for adjusting the saw blade position in a second degree of freedom 42, for example the height or the second angle of the saw blade. The second actuator 22 is configured to move the saw blade 3 (in particular together with the saw blade drive unit 9 ) along a second degree of freedom 42 . The second degree of freedom 42 is exemplarily a linear degree of freedom, in particular in the yz-plane. Advantageously, the first direction of the second degree of freedom 42 corresponds to the saw blade angle adjustable via the first degree of freedom 41. For example, in a vertical alignment of the saw blade plane, the direction of the second degree of freedom is the z-direction. In an alternative embodiment (illustrated in FIG. 4), the second degree of freedom 42 is exemplarily a rotational degree of freedom, in particular about an axis in the z-direction. The second actuator 22 is exemplarily configured as a second spindle drive. Advantageously, the second actuator 22 comprises a second motion element 62, which is placed in a second linear motion state by the second rotational motion of the second rotor 32. The second motion element 62 is kinematically connected to the saw blade 3 such that a second linear motion of the second motion element 62 can cause motion of the saw blade 3 along the second degree of freedom 42. For example, the second actuator 22 comprises a second spindle 52, which is placed in a second spindle rotational motion by the second rotational motion of the second rotor 32, which causes a second linear motion of a second motion element 62. The second motion element 62 is configured, for example, as a spindle nut. Alternatively, it is possible for the second motion element 62 to be configured as a spindle, which is placed in a second linear motion by the second rotational motion of the second rotor 32.

[0025] Advantageously, the sawing device 10 further comprises a control unit 14, which comprises, for example, a microcontroller. The control unit 14 is communicatively connected to the operating device 5. The control unit 14 is designed to receive operating signals from the operating device 5, which operating signals expediently map out the operations of the operating device 5 performed by the user. The control unit 14 is communicatively connected to the saw blade drive unit 9 and is configured to control this saw blade drive unit 9 by means of a drive unit control signal, in particular according to an operating signal, in order to bring about the saw blade 3 being placed in a state of saw blade rotational movement. The control unit 14 is communicatively connected to the first actuator 21. The control unit 14 is configured to control the first actuator 21 by a first drive adjustment signal, in particular according to an actuation signal, in order to cause the saw blade 3 to be placed in a state of a first translation movement along a first degree of freedom 41. The control unit 14 is communicatively connected to the second actuator 22. The control unit 14 is configured to control the second actuator 22 by a second drive adjustment signal, in particular according to an actuation signal, in order to cause the saw blade 3 to be placed in a state of a second translation movement along a second degree of freedom 42.

[0026] Advantageously, the saw device 10, in particular the control unit 14, is formed to detect the current saw blade position of the saw blade 3 on the basis of a first rotor movement of the first rotor 31. The first rotor movement is, by way of example, a rotational movement of the first rotor 31, via which the first movement element 61 is placed in a first linear movement state.

[0027] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect first rotor movement information mapping the first rotor movement and to calculate the current saw blade position of the saw blade 3 based on this rotor movement information.

[0028] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect the first rotor movement, in particular the number of rotations (in particular of the first rotor 31) and / or the number of steps (in particular of the first rotor 31) as first rotor movement information. Advantageously, the first electric motor is configured as a first step motor and the detected rotor movement is a number of steps, in particular microsteps, of the first rotor 31 of the first step motor. Exemplarily, for example based on the voltage and / or current of the first electric actuator 21, the saw device 10 is formed to detect the first rotor movement within the operating range of this first electric actuator 21.

[0029] Advantageously, the saw device 10 is configured to detect the current saw blade position based on the first rotor movement without a position sensor. In particular, the saw device 10 is configured to detect the current saw blade position without the use of a position sensor. For example, the saw apparatus 10 does not include any position sensor for detection of the current saw blade position, and in particular does not include any position sensor for direct detection of the current saw blade position.

[0030] Advantageously, the saw device 10, in particular the control unit 14, is configured to calculate a current first saw blade position value based on the detected first rotor movement. The first saw blade position value represents the saw blade position with respect to the first degree of freedom 41. The first saw blade position value is, for example, the angle of the saw blade 3 in particular relative to the xz plane, ie in particular relative to a vertical plane oriented parallel to the cutting direction of the saw blade.

[0031] Advantageously, the saw apparatus 10, in particular the control unit 14, is configured to calculate a current first saw blade position value on the basis of a previous first saw blade position value and on the basis of the first rotor movement, the previous first saw blade position value mapping the saw blade position prior to the first rotor movement. To obtain the current first saw blade position value, for example, the control unit 14 converts the first rotor movement into an angular change of the saw blade 3 and adds this angular change to the previous first saw blade position value.

[0032] Expediently, the saw device 10, in particular the control unit 14, is designed to determine the saw blade position incrementally, in particular on the basis of the first rotor movement.

[0033] Advantageously, the saw device 10, in particular the control unit 14, is formed to detect the current saw blade position on the basis of the first rotor movement and on the basis of a second rotor movement of the second rotor 32. The second rotor movement is a rotational movement of the second rotor 32, via which the second movement element 62 is placed in a second linear movement state.

[0034] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect as the current saw blade position a current first saw blade position value and a current second saw blade position value, the second saw blade position value representing the saw blade position with respect to the second degree of freedom 42. The second saw blade position value is, for example, the height of the saw blade 3, in particular of its upper edge, relative to the workpiece rest 2 (preferably with respect to the vertical orientation of the saw blade plane). Expediently, this second saw blade position value represents the cutting depth of the saw blade 3. In an alternative embodiment, the second saw blade position value is, for example, a second angle of the saw blade 3, for example about the z-axis or in the plane of the workpiece rest 2. Expediently, this second saw blade position value represents a second cutting angle of the saw blade 3.

[0035] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect second rotor motion information mapping the second rotor motion and to calculate a current saw blade position, in particular a current second saw blade position value, based on this second rotor motion information.

[0036] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect the second rotor movement, in particular the number of rotations (in particular of the second rotor 32) and / or the number of steps (in particular of the first second rotor 32) as second rotor movement information. Advantageously, the second electric motor is configured as a second step motor and the detected rotor movement is a number of steps, in particular microsteps, of the second rotor 32 of the second step motor. Illustratively, for example, based on the voltage and / or current of the second electrical actuator 22, the saw apparatus 10 is configured to detect second rotor movement within the operating range of the second electrical actuator 22.

[0037] Advantageously, the saw device 10, in particular the control unit 14, is configured to calculate a current second saw blade position value based on the detected second rotor movement, for example the height of the saw blade 3 (advantageously with respect to the vertical orientation of the saw blade plane).

[0038] Advantageously, the saw device 10, in particular the control unit 14, is configured to calculate a current second saw blade position value on the basis of a previous second saw blade position value and on the basis of the second rotor movement, the previous second saw blade position value mapping the saw blade position prior to the second rotor movement. To obtain the current second saw blade position value, for example, the control unit 14 converts the second rotor movement into a height change of the saw blade 3 and adds this height change to the previous second saw blade position value.

[0039] Expediently, the saw device 10, in particular the control unit 14, is designed to determine the saw blade position incrementally, in particular on the basis of the first rotor movement and / or the second rotor movement.

[0040] The saw device 10, preferably the control unit 14, is expediently configured to store the current saw blade position, in particular the current first saw blade position value and / or the second saw blade position value, in particular in a memory of the control unit 14. The sawing device 10 is expediently designed to display the current saw blade position, in particular the first saw blade position value and / or the second saw blade position value, on the display unit 8 .

[0041] According to an alternative embodiment, the saw device 10 is configured as a cross-cut saw, in which case the first degree of freedom is expediently the cutting angle and / or the second degree of freedom is the bevel angle.

[0042] Advantageously, the saw device 10 is configured to perform a calibration movement of the saw blade 3 under the use of the actuator device 11 in order to obtain calibration information and / or to perform a positional equilibrium of the detected saw blade position with the actual saw blade position.

[0043] During the calibration movement, the saw blade 3 is appropriately moved to one or two end positions regarding the first degree of freedom 41, i.e. in particular to a maximum and / or minimum saw blade angle, and to one or two end positions regarding the second degree of freedom 42, i.e. in particular to a maximum and / or minimum saw blade height. Expediently, the control unit 14 is designed to control the first actuator 21 and the second actuator 22 in order to cause the saw blade 3 to carry out a calibration movement.

[0044] The end position for the first degree of freedom 41 may in particular be referred to as an angular end position, and the end position for the second degree of freedom 42 may in particular be referred to as a second end position or a height end position.

[0045] The respective end positions are expediently defined by respective end abutments.

[0046] Advantageously, the saw device 10 is configured to determine the calibration information on the basis of the first and / or second rotor movement and / or on the basis of measurement information, in particular supplied from an external source, This measurement information may, for example, be in one or each end position of the first and / or second degrees of freedom 41, 42 and / or in the first and / or second zero positions. Indicates the position of saw blade 3.

[0047] Advantageously, the calibration information comprises movement range information, which expediently describes the movement range, in particular the extension of the movement range, of the saw blade 3 between two end positions of this saw blade 3.

[0048] In particular, the movement range information comprises a first movement range value for a first degree of freedom 41 and / or a second movement range value for a second degree of freedom 42 . The first movement range value represents, for example, an extension of a first movement range of the saw blade 3 with respect to the first degree of freedom 41. The extension of the first movement range is, exemplarily, an angular difference between a first and a second end position (with respect to the first degree of freedom 41) of the saw blade 3 - i.e. between a minimum and a maximum saw blade angle.

[0049] The second movement range value represents, for example, an extension of a second movement range of the saw blade 3 with respect to the second degree of freedom 42. The extension of the second movement range is, exemplarily, a height difference or a bevel angle difference between a first and a second end position (with respect to the second degree of freedom 42) of the saw blade 3 - i.e. between a minimum and a maximum saw blade height or between a minimum and a maximum bevel angle.

[0050] Expediently, the saw device 10, in particular the control unit 14, calculates the movement range information on the basis of the first rotor movement and / or the second rotor movement carried out during the calibration movement.

[0051] Advantageously, the calibration information comprises end position information, which represents one or two end positions of the saw blade 3 . For example, the end position information may comprise a first end position value for the first degree of freedom 41, the first end position value representing a first end position for the first degree of freedom 41, e.g. a minimum saw blade angle, and / or a second end position value for the first degree of freedom 41, the second end position value representing a second end position for the first degree of freedom 41, e.g. a maximum saw blade angle.

[0052] For example, the end position information may comprise a first end position value for the second degree of freedom 42, the first end position value representing a first end position for the second degree of freedom 42, such as a minimum saw blade height or a minimum bevel angle, and / or a second end position value for the second degree of freedom 42, the second end position value representing a second end position for the second degree of freedom 42, such as a maximum saw blade height or a maximum bevel angle.

[0053] Alternatively, when the saw blade 3 is located in the respective end position, the respective end position value is detected by means of an external sensor arrangement and supplied externally to the saw device 10, in particular to the control unit 14.

[0054] Advantageously, the calibration information comprises zero position information, which represents one or two zero positions of the saw blade 3. For example, the zero position information comprises a first zero position value for the first degree of freedom 41. The first zero position value represents a first zero position of the saw blade 3. Expediently, in the first zero position, the saw blade 3 is oriented vertically by its saw blade plane. Expediently, in the first zero position, the saw blade angle is equal to zero. The first zero position is also referred to as the angle zero position.

[0055] For example, the calibration information comprises a second zero position value for the second degree of freedom 42. The second zero position value represents a second zero position of the saw blade 3. In the second zero position, the saw blade 3 is expediently positioned with its upper edge at the same height as the workpiece rest 2. The height of the saw blade is expediently equal to zero in the second zero position. The second zero position is also referred to as the height zero position. In an alternative embodiment, the saw blade 3 is aligned in the second zero position perpendicular to a workpiece abutment, in particular a fence 2.1, arranged on or in the workpiece base 2.

[0056] Advantageously, the saw device 10 is configured to carry out a calibrating movement of the saw blade 3 with the aid of the actuator device 11 in order to carry out a positional equilibrium of the detected saw blade position with the actual saw blade position. For example, the saw device 10 moves the saw blade 3 to an end position for the first degree of freedom 41 within the range of the calibrated movement, and At this end position, the current first saw blade position value is set equal to the end position value for the first degree of freedom 41 assigned to this end position, for example the first end position value or the second end position value. The end position values, to which the current first saw blade position value is set, are expediently stored in the control unit 14 and / or calculated within the scope of a previous calibration movement.

[0057] For example, the saw device 10 moves the saw blade 3 to an end position for the second degree of freedom 42 within the range of the calibrated movement, and At this end position, the current second saw blade position value is set to be equal to the end position value for the second degree of freedom 42 assigned to this end position, for example the first end position value or the second end position value. The end position values, to which the current second saw blade position value is set, are expediently stored in the control unit 14 and / or calculated within the scope of a previous calibration movement.

[0058] Advantageously, the saw device 10, in particular the control unit 14, is designed to determine the current saw blade position, in particular the first saw blade position value and / or the second saw blade position value, taking into account the calibration information. In particular, the saw device 10, in particular the control unit 14, is configured to take into account the zero position information when detecting the current saw blade position in order to calculate the current saw blade position - i.e. in particular the current first saw blade position value and / or the second saw blade position value - in relation to the first zero position and / or the second zero position.

[0059] Advantageously, the saw device 10, in particular the control unit 14, is configured to test, within the scope of a calibration test, whether a calibration movement is necessary and, if this calibration test reveals that a calibration movement is necessary, to perform this calibration movement and / or to output a calibration notification. Advantageously, the saw device 10 outputs a calibration notification on the display unit 8. This calibration notification is in particular a request to the user, for example by user input via the operating device 5, to initiate a calibration movement.

[0060] Advantageously, the calibration movement can be initiated manually, via a user input, in particular via the operating device 5. Alternatively, it is possible for the saw device 10 to be configured to automatically initiate the calibration movement, in particular on the basis of a calibration test.

[0061] Expediently, the saw device 10, in particular the control unit 14, is designed to test during a calibration test whether drive defects, such as blocking and / or slippage of the actuator device 11, are present or have been present since the last calibration test.

[0062] A drive fault is present in particular when there is a step loss, in particular an actual or predicted step loss, of a step motor of the actuator device 11, in particular the first and / or second step motor. A step loss may be induced, for example, by a blockage of the mechanism of the actuator device 11, thus resulting in multiple microsteps of the step motors - in particular the first step motor and / or the second step motor - being performed without these microsteps being detected as (first and / or second) rotor movement. For example, if the motor idles for a short period of time, one or more microsteps may be lost - i.e., not detected as the (first and / or second) rotor motion occurs. The lost steps may cause the current saw blade position, detected based on the first and / or second rotor motion, to not correspond to the actual saw blade position.

[0063] The saw device 10 is advantageously configured to perform a calibration movement and / or to output a calibration notification in response to a drive defect.

[0064] Alternatively, the saw device 10 is configured to perform a calibration movement and / or to output a calibration notification directly in response to a drive defect occurring at the start of the movement movement of the saw blade 3 (in particular at the starting ramp of the first and / or second step motor).

[0065] Alternatively, the saw device 10 is adapted to detect the presence of a blockage during the movement of the saw blade 3 (in particular after the starting ramp of the first and / or second stepper motor) and to immediately terminate the movement in response thereto, There is therefore no possibility of any deviation between the detected current saw blade position and the actual saw blade position and expediently no calibration movements are necessary (despite the occurrence of blockages).

[0066] Expediently, the saw device 10, in particular the control unit 14, is designed in such a way that during the calibration test it is tested whether a voltage fault, for example a previously occurring voltage loss, is present.

[0067] A voltage loss exists, for example, if the supply voltage to the control unit 14 is temporarily too low or absent, for example because the battery of the saw device 10 has been drawn down or is provided with too little voltage. A voltage loss may cause the calibration information, in particular the end position information and / or the current first saw blade position value and / or the current second saw blade position value, to be lost and / or corrupted.

[0068] The saw device 10 is advantageously configured to perform a calibration movement and / or to output a calibration notification in response to a voltage loss.

[0069] Expediently, the saw device 10, in particular the control unit 14, is configured to test, during a calibration test, whether a current saw blade position can be determined, In particular, the saw device 10, in particular the control unit 14, is configured to test, during a calibration test, whether the current first and / or second saw blade position values ​​are present and / or reliable. As explained above, the detection of the saw blade position is carried out in particular incrementally, so that after the translation movement, this saw blade position value can be used as the previous saw blade position value, therefore, in order to be able to calculate the current saw blade position value that is currently valid after the translation movement of the saw blade 3 (based on the first and second rotor movements), it is necessary that the currently valid saw blade position value exists before the translation movement of the saw blade 3.

[0070] The saw device 10 is advantageously configured to perform a calibration movement and / or to output a calibration notification in response to detection of the current saw blade position not being possible, e.g. in response to the absence of any current (or previous) first saw blade position value and / or any current (or previous) second saw blade position value.

[0071] Expediently, the saw device 10, in particular the control unit 14, is designed to test, in a calibration test, whether an operating time value representative of the operating time of the saw device exceeds an operating time threshold value, which defines, for example, a certain number of operating hours after which a calibration movement should be performed.

[0072] The saw apparatus 10 is advantageously configured to perform a calibration movement and / or to output a calibration notification in response to the activation time value exceeding the activation time threshold.

[0073] Alternatively, it is possible for the saw device 10 to be designed in such a way that, upon switching on of the saw device 10, a calibration test and / or a calibration movement is carried out.

[0074] Advantageously, the saw device 10 is configured to perform the calibration movement only while there is a user input, in particular operation of the operating device 5 of the saw device 10, and to stop the calibration movement when there is no longer a user input, in particular operation of the operating device 5 of the saw device 10. This user input is for example the pressing of one of the push buttons 7 and / or the rotation and / or pressing of the rotate-push actuator 6 .

[0075] Alternatively, the saw device 10 is configured to continue the calibration movement after cessation of said calibration movement as a function of a user input, in particular the same user input being present again.

[0076] Advantageously, the control unit 14 is configured to test, based on an actuation signal from the actuation device 5, whether actuation of the actuation device 5 is currently present and to continue the calibration movement (by corresponding control of the actuator device 11) only as long as actuation of the actuation device 5 is currently present.

[0077] Advantageously, the actuator device 11 is formed to adjust the saw blade position in two degrees of freedom, in particular a first degree of freedom 41 and / or a second degree of freedom . The saw device 10 is in particular configured to perform, in the calibration movement, a first calibration movement, in which the saw blade 3 is moved in a first degree of freedom 41 of the saw blade, and to perform, in the calibration movement, a second calibration movement, in which the saw blade 3 is moved in a second degree of freedom 42 of the saw blade. The saw device 10 is expediently designed to perform the first and second calibration movements at least partially simultaneously, in this way short durations of the calibration movements can be achieved, for example the entire calibration movement lasting less than 40 seconds.

[0078] Advantageously, the saw device 10 is configured to store the current saw blade position - for example as position memory device information - before the start of the calibration movement and to move the saw blade 3 to the stored saw blade position - i.e. the saw blade position corresponding to the stored position memory device information - after this calibration movement. Advantageously, the saw device 10 moves the saw blade 3 again at the end of the calibration movement to the starting state (before this calibration movement).

[0079] Advantageously, the actuator device 11 is formed to adjust the saw blade position in two degrees of freedom, in particular a first degree of freedom 41 and / or a second degree of freedom . The saw device 10 is advantageously configured such that in a calibration movement the saw blade 3 moves to one or both end positions of one degree of freedom, e.g. the first degree of freedom 41, when the saw blade 3 is not located in the end position of the other degree of freedom, e.g. the second degree of freedom 42. Advantageously, the control unit 14 controls the actuator device 11 in such a way that in the calibration movement the end position of the first degree of freedom 41 is reached if the saw blade 3 is not located in its deepest position, i.e. in an end position with a minimum height, with respect to the second degree of freedom 42. Expediently, the end position of the first degree of freedom 41 is reached if the saw blade is located at a height of 25 mm and / or at more than 50% of the maximum height with respect to the second degree of freedom 42.

[0080] In the following, a just exemplary embodiment of the calibration movement is described.

[0081] For example, the saw blade 3 is first of all pivoted by a first, in particular positive, angle, in particular without adjustment of the height of the saw blade. Expediently, the saw blade 3 is then moved to a first (especially lower) height end position and at the same time to a second (especially positive) angle end position. The saw device 10 then sets the current first saw blade position value and the current second saw blade position value to their respective end position values ​​(calculated in particular by the first calibration), which correspond to the end position to be reached. Expediently, the saw device then reaches a second, in particular upper, height end position and expediently performs a plausibility test of the height of the saw blade in this second height end position. In particular, in this validity test, the saw device 10 tests whether a second saw blade position value, determined on the basis of a second rotor movement, corresponds to a second end position value in terms of height. The saw device 10 then operates the saw blade 3 to a height below the second height end position and at the same time moves this saw blade 3 up to a first (particularly negative) angle end position. The sawing device 10 expediently carries out a test of the plausibility of the saw blade angle in this first angle end position. In particular, in this validity test, the saw device 10 tests whether a first saw blade position value, determined on the basis of a first rotor movement, corresponds to a second end position value in terms of angle. The saw device 10 then moves the saw blade 3 to the saw blade position in which it was positioned immediately before the performance of the calibration movement.

[0082] Expediently, the control unit 14 is configured to move the saw blade 3 to its saw blade position using the actuator device 11, so that a first current saw blade position value detected (based on the first rotor movement) corresponds to a first set position value and / or a second current saw blade position value detected (based on the second rotor movement) corresponds to a second set position value. Expediently, the first set position value and / or the second set position value can be input via the operating device 5, in particular via the rotary-pressure actuator 6.

[0083] Advantageously, the saw device 10 can be operated according to a method, which comprises: detecting a current saw blade position based on a first rotor movement; The steps are as follows.

[0084] Advantageously, the method further comprises the step of performing a calibration movement, in particular the calibration movement described above.

[0085] Optionally, the saw assembly 10 performs an initial calibration move, a start-up calibration move, and a height calibration move. The initial calibration movement and / or the start-up calibration movement are in particular examples of the calibration movements described above, so that the above explanations apply expediently as well to these calibration movements.

[0086] The initial calibration movement is expediently performed at the factory, in particular immediately after production of the saw device 10, and / or by a user prior to start-up of the saw device 10. The start-up calibration movement and / or the height calibration movement are expediently performed by a user, in particular during start-up of the saw device 10 or after start-up of the saw device 10.

[0087] During the first calibration movement, the saw device 10 expediently determines the movement range information and / or the end position information. Expediently, an angle-zero position calibration is then performed, in which the saw device 10 reaches a first zero position by means of the saw blade 3 (based on the stored first zero position value, which represents in particular the first zero position with respect to the end position value). Expediently, the deviation of the saw blade 3 from the actual first zero position is subsequently measured, in particular by means of an external sensor unit, and the detected deviation is transmitted to the control unit 14. The control unit 14 uses this deviation for correcting the first zero position value and / or stores this deviation as a first offset value of the first zero position value.

[0088] In the start-up-calibration move, In particular, to show the user the progress of the calibration movement, and / or To compensate for possible positional adjustments of the saw blade position after manufacture (e.g. during transport, for example due to vibrations), for example by a balance between the detected current saw blade position and the actual saw blade position in the end position, The saw device 10 reaches an end position and / or a zero position of the saw blade 3 .

[0089] In the height calibration move, The saw device 10 moves the saw blade from below, in particular from a lower end position in terms of the height of the saw blade, upwards until the upper edge of the saw blade is located at the height of the workpiece placement portion, and the saw blade is accordingly located in a second zero position. Optionally, this second zero position of the saw blade 3 can be automatically recognised by the saw device 10 . Advantageously, the saw device 10 can be queried, via operation of the operating device 5, as to whether the current saw blade position is the second zero position, and thus the saw device 10 stores the current position as the second zero position, particularly with respect to the end position of the saw blade 3.

Claims

1. A sawing device (10), in particular a table circular saw or a cross-cut saw, which sawing device comprises: a processing material placement section (2) for placing the processing material (1); A saw blade (3), as well as an electrical actuator device (11) for adjusting the saw blade position (3) relative to the workpiece rest (2), In the saw device, the electric actuator device (11) comprises a first electric actuator (21), which has a first rotor (31) and is used for adjusting the saw blade position in a first degree of freedom (41), in particular the saw blade angle, and The saw device (10) is configured to detect a current saw blade position of the saw blade (3) based on a first rotor movement of the first rotor (31). A saw device (10) characterized in that

2. The saw device (10) comprises:

2. The saw apparatus (10) of claim 1, configured to detect the current saw blade position based on the first rotor movement without a position sensor.

3. The saw device (10) comprises:

3. The saw device (10) according to claim 1 or 2, characterized in that the saw device (10) is configured to detect the number of rotations of the first rotor (31) and / or the number of steps of the first rotor (31) as the first rotor movement.

4. The electric actuator device (11) further comprises a second electric actuator (22), This second actuator is used for adjusting the saw blade position in a second degree of freedom (42), in particular the height of the saw blade, and 4. The saw device (10) of claim 1, wherein the saw device (10) is configured to detect the current saw blade position based on the first rotor movement and based on a second rotor movement of a second rotor (32) of the second actuator (22).

5. The saw device (10) comprises:

5. A saw device (10) according to any one of claims 1 to 4, characterized in that it is configured to carry out a calibration movement of the saw blade (3) using the actuator device (11) in order to obtain calibration information and / or to carry out a positional equilibrium of the detected current saw blade position with the actual current saw blade position.

6. The calibration information is - a range of movement information is provided, which range of movement information represents a range of movement of the saw blade (3) between two end positions of the saw blade (3); and / or - comprising end position information, which represents one or two end positions of the saw blade (3) and / or comprising zero position information, which represents one or two zero positions of the saw blade (3), 6. A saw device (10) according to claim 5.

7. 7. The saw device (10) according to claim 5 or 6, characterized in that the saw device (10) is configured to detect the saw blade position taking into account the calibration information.

8. The saw device (10) comprises: - within the scope of a calibration test, to test whether said calibration movement is necessary; and A saw device (10) according to any one of claims 5 to 7, characterized in that the calibration test is configured to perform a calibration movement and / or to output a calibration notification if the calibration test reveals that the calibration movement is necessary.

9. The saw device (10) in the calibration test whether there are drive defects, for example blocking and / or slippage of the actuator device (11), and / or whether a voltage fault is present, e.g. a previous voltage loss, and / or whether detection of the current saw blade position is possible, and / or whether an operating time value representative of the operating time of the saw device exceeds an operating time threshold value, 9. The saw apparatus (10) of claim 8, configured to test:

10. The saw device (10) comprises: - the calibration movement is carried out only during the presence of a user input, in particular an operation of an operating device (5) of the saw device (10); and 10. The saw device (10) according to any one of claims 5 to 9, characterized in that it is arranged to stop the calibration movement when the user input is no longer present.

11. The actuator device (11) is configured to adjust the saw blade position in two degrees of freedom, and The saw device (10) In said calibration movement, a first calibration movement is performed, in which the saw blade (3) is moved in a first degree of freedom (41) of said saw blade, and In said calibration movement, a second calibration movement is performed, in which the saw blade (3) is moved in a second degree of freedom (42) of said saw blade, and the saw device (10) is configured to perform the first calibration movement and the second calibration movement at least partially simultaneously, A sawing device (10) according to any one of claims 5 to 10.

12. The saw device (10) comprises: storing the current saw blade position prior to the start of the calibration movement; and 12. A sawing device (10) according to any one of claims 5 to 11, characterized in that it is adapted to move the saw blade (3) to the stored saw blade position after this calibration movement.

13. the actuator device (11) is configured to adjust the saw blade position in two degrees of freedom; and the saw device (10) is configured to move in the calibration movement to one or both end positions of one of the degrees of freedom only if the saw blade is not located in the end position of the other degree of freedom, A sawing device (10) according to any one of claims 5 to 12.

14. A method for operating a saw apparatus (10) according to any one of claims 1 to 13, comprising the steps of: The method further comprises detecting the current saw blade position based on the first rotor movement; A method comprising the steps of:

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