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 device, in particular a table circular saw or cross-cut saw, which sawing device comprises: a processing material placement portion for placing the processing material; Saw blades, as well as an electrical actuator device for adjusting the saw blade position relative to the workpiece rest; In the sawing 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. 5,649,999 describes a movable table circular saw with an electric actuator for 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 INVENTION 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 sawing device according to claim 1. The sawing device is configured to determine a current sawing position of the saw blade based on a first rotor movement of the first rotor. [Effects of the Invention]

[0006] The detected saw blade position may be used, for example, by the sawing device to display the current saw blade position to a user, and / or For example, to move the saw blade to a predetermined saw blade position using a position control device or a position adjustment device based on the detected saw blade position; It 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 sawing device, the method comprising: detecting a current saw blade position based on a first rotor movement; It has the following steps.

[0010] Further exemplary details and exemplary embodiments are described below in conjunction with the figures. [Brief explanation of the drawings]

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

[0012] In the following description, reference should be made to the x-, y- and z-directions shown in the figures, which are oriented perpendicular to one another, the x- and y-directions being horizontal directions and the z-direction being vertical.

[0013] 1 shows an exemplary embodiment of a sawing apparatus 10. The sawing apparatus 10 is exemplarily configured as a table circular saw. Alternatively, the sawing apparatus 10 can be configured differently, for example as a cross-cut saw. An exemplary embodiment of the sawing apparatus 10 is shown in FIG. 4.

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

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

[0016] The sawing device 10 comprises a saw blade 3. The saw blade 3 is aligned with its sawing 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 upward from the workpiece rest 2 through an opening provided in the workpiece rest 2 and / or downward 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 sawing device 10 expediently comprises an operating device 5, via which a user can operate the sawing 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 to operate the sawing device 10. For example, the operating device comprises a rotary-pressure 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 the sawing device 10, and FIG. 3 shows a schematic front view of the sawing device 10. As shown in FIG.

[0020] The sawing device 10 comprises an electric saw blade drive unit 9, also referred to as a drive electric motor, which is used to set the saw blade 3 in a sawing rotational movement in which the workpiece 1 can be sawed by the saw blade 3. The saw blade rotational movement is preferably effected around a rotation axis oriented perpendicular to the plane of the saw blade.

[0021] The sawing device 10 comprises an electric actuator device 11 for adjusting the sawing 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 sawing 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 to adjust the saw blade position in a first degree of freedom 41, in particular the saw blade angle. The first degree of freedom 41 is exemplarily a rotational degree of freedom, in particular a degree of freedom 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 configured 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 put into a first linear motion state by the first rotational motion of the first rotor 31. The first rotational movement is illustratively performed around 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 pivotal motion of the saw blade 3 along the first degree of freedom 41. For example, the first actuator 21 includes a first spindle 51, which is placed in a first spindle rotational motion state by the first rotational motion of the first rotor 31, and 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, the first motion element 61 can 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 exemplarily comprises a swivel device 12, which exemplarily comprises the saw blade 3, the saw blade drive unit 9 and, expediently, a second actuator 22. The swivel device 12 is generally mounted so as to be swivelable about a pivot axis extending parallel to the x-direction. The pivoting device 12 is movably connected to the first movement element 61, so 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 to adjust 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 illustratively 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 orientation 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 illustratively a rotational degree of freedom, in particular about the z-axis. The second actuator 22 is exemplarily configured as a second spindle drive and advantageously comprises a second motion element 62, which is put into a second linear motion state by the second rotational motion of the second rotor 32. The second motion element 62 is kinematically coupled 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 includes a second spindle 52, which is placed in a second spindle rotational motion by the second rotational motion of the second rotor 32, and which causes a second linear motion of the second motion element 62. The second motion element 62 is configured, for example, as a spindle nut. Alternatively, the second motion element 62 can 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 configured to receive operating signals from the operating device 5, which operating signals appropriately 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 in accordance with an operating signal, in order to bring about the saw blade 3 being placed in a 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 means of a first drive adjustment signal, in particular in accordance with an actuation signal, in order to bring about the saw blade 3 being placed in a state of 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 means of a second drive adjustment signal, in particular in accordance with the actuation signal, in order to bring about the second movement of the saw blade 3 along the second degree of freedom 42.

[0026] Advantageously, the sawing device 10, in particular the control unit 14, is configured 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 moving element 61 is placed in a first linear state of movement.

[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 number of rotations (in particular of the first rotor 31) and / or the number of steps (in particular of the first rotor 31) as the first rotor movement, in particular as first rotor movement information. Advantageously, the first electric motor is configured as a first step motor and the detected rotor movement is the 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 configured 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 sawing device 10 does not include any position sensors for detecting the current saw blade position, and in particular does not include any position sensors for directly detecting the current saw blade position.

[0030] Advantageously, the sawing 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 representing 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 relative to the xz plane, ie relative to a vertical plane, in particular oriented parallel to the cutting direction of the saw blade.

[0031] Advantageously, the sawing device 10, in particular the control unit 14, is configured to calculate a current first saw blade position value based on a previous first saw blade position value and based on 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 sawing 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 configured 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 moving 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 (preferably with respect to the vertical orientation of the saw blade plane), in particular of the upper edge of this saw blade 3 relative to the workpiece rest 2. 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 movement information that maps the second rotor movement and to calculate a current saw blade position, in particular a current second saw blade position value, based on this second rotor movement information.

[0036] Advantageously, the saw device 10, in particular the control unit 14, is configured to detect 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, in particular second rotor movement information. Advantageously, the second electric motor is configured as a second step motor and the detected rotor movement is the 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 electric actuator 22, the saw device 10 is configured to detect the second rotor movement within the operating range of the second electric actuator 22.

[0037] Advantageously, the sawing 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, such as the height of the saw blade 3 (advantageously with respect to the vertical orientation of the saw blade plane).

[0038] Advantageously, the sawing device 10, in particular the control unit 14, is configured to calculate a current second saw blade position value based on a previous second saw blade position value and on 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 sawing 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 sawing 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 current 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 and / or second saw blade position value, on the display unit 8 .

[0041] According to an alternative embodiment, the sawing 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 using the actuator device 11 in order to obtain calibration information and / or to perform positional balancing of the detected saw blade position with the actual saw blade position.

[0043] During the calibration movement, the saw blade 3 is suitably moved to one or two end positions with respect to the first degree of freedom 41, i.e., in particular to the maximum and / or minimum saw blade angle, and to one or two end positions with respect to the second degree of freedom 42, i.e., in particular to the 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 perform 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 represents for example the position of the saw blade 3 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.

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

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

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

[0050] Expediently, the saw device 10, in particular the control unit 14, calculates the movement range information based on 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, which first end position value represents 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, which second end position value represents 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 with 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. In the second zero position, the height of the saw blade is expediently equal to zero. 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 rest 2.

[0056] Advantageously, the saw device 10 is configured to carry out a calibration movement of the saw blade 3 using the actuator device 11 in order to carry out a positional balance 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 calibration 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 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 configured to determine the current saw blade position, in particular the first saw blade position value and / or the second saw blade position value, taking the calibration information into account. 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 second saw blade position value - in relation to the first zero position and / or second zero position.

[0059] Advantageously, the saw device 10, in particular the control unit 14, is configured to test whether a calibration movement is necessary within the scope of a calibration test 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 to initiate a calibration movement, for example by user input via the operating device 5.

[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 configured to test during the calibration test whether drive defects, such as blocking and / or slippage of the actuator device 11, exist or have existed 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 the step motors 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 in the mechanism of the actuator device 11, 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 a (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 (first and / or second) rotor movement. The lost steps may cause the current saw blade position, detected based on the first and / or second rotor movement, 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] Optionally, 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 of the saw blade 3 (in particular at the starting ramp of the first and / or second step motor).

[0065] Optionally, the saw device 10 is configured to detect the presence of a blockage during the movement of the saw blade 3 (in particular after the start-up ramp of the first and / or second stepper motor) and to immediately terminate the movement in response thereto; Therefore, there is no deviation between the detected current saw blade position and the actual saw blade position, and expediently no calibration movement is necessary (despite the occurrence of blockages).

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

[0067] A voltage loss may occur, for example, if the supply voltage to the control unit 14 is temporarily too low or absent, for example because the battery in the saw device 10 is drawn down or provides too little voltage. A voltage loss can cause the calibration information, particularly 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 the current saw blade position can be determined, and in particular, the saw device 10, in particular the control unit 14, is configured, during a calibration test, to 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 movement of the saw blade, this saw blade position value can be used as the previous saw blade position value, and therefore, in order to be able to calculate the current saw blade position value that is currently valid after the movement of the saw blade 3 (based on the first and second rotor movements), it is necessary that a currently valid saw blade position value exists before the movement of the saw blade 3.

[0070] The saw device 10 is advantageously configured to perform a calibration movement and / or output a calibration notification in response to detection of the current saw blade position not being possible, for example 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 10, in particular the control unit 14, is configured to test, during a calibration test, whether an operating time value representing the operating time of the saw exceeds an operating time threshold, which may, for example, define a certain number of operating hours after which a calibration movement should be performed.

[0072] The saw device 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, the sawing device 10 can be configured to carry out a calibration test and / or a calibration movement upon switching on the sawing device 10 .

[0074] Advantageously, the saw device 10 is configured to perform the calibration movement only while there is 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 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 rotation-push actuator 6 .

[0075] Alternatively, the saw device 10 is configured to continue the calibration movement after stopping it depending on 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 configured to adjust the saw blade position in two degrees of freedom, in particular in a first degree of freedom 41 and / or a second degree of freedom 42 . The saw device 10 is particularly configured to perform a first calibration movement during the calibration movement, in which the saw blade 3 is moved in its first degree of freedom 41, and a second calibration movement during the calibration movement, in which the saw blade 3 is moved in its second degree of freedom 42. The saw device 10 is expediently configured 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 lasts less than 40 seconds.

[0078] Advantageously, the saw device 10 is configured to store the current saw blade position - for example as position memory 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 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 position (before this calibration movement).

[0079] Advantageously, the actuator device 11 is configured to adjust the saw blade position in two degrees of freedom, in particular in a first degree of freedom 41 and / or a second degree of freedom 42 . The saw device 10 is advantageously configured to move to one or both end positions of one degree of freedom, for example the first degree of freedom 41, in the calibration movement when the saw blade 3 is not located in the end position of the other degree of freedom, for example the second degree of freedom 42. Advantageously, the control unit 14 controls the actuator device 11 in such a way that the end position of the first degree of freedom 41 is reached in the calibration movement if the saw blade 3 is not in the deepest position, i.e. the end position with the smallest 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, just an 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 adjusting the height of the saw blade. Expediently, the saw blade 3 is then moved to a first (especially lower) height end position and simultaneously 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 positions to be reached. Expediently, the sawing device then reaches a second (in particular upper) height end position and expediently carries out a test of the adequacy 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 the second saw blade position value detected on the basis of the second rotor movement corresponds to the 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 simultaneously moves the saw blade 3 to a first (particularly negative) angle end position. The sawing device 10 expediently carries out a test of the adequacy 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 sawing device 10 then moves the saw blade 3 to the sawing position in which the saw blade 3 was positioned immediately before the calibration movement was performed.

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

[0083] Advantageously, the sawing device 10 can be operated according to a method comprising: first, detecting the current saw blade position based on the rotor movement; It has the following steps.

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

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

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

[0087] During the first calibration movement, the saw device 10 expediently determines the movement range information and / or end position information. Expediently, an angle-zero position calibration is then performed, in which the saw device 10 reaches the first zero position with the saw blade 3 (in particular based on the stored first zero position value, which represents 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 for 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 any possible adjustments of the saw blade position after manufacture (for example during transport, for example due to vibrations), for example by balancing the detected current saw blade position with the actual saw blade position in the end position, The sawing device 10 reaches the end position and / or the zero position of the saw blade 3 .

[0089] In the height calibration move, The saw device 10 moves the saw blade upward from below, particularly from a lower end position in terms of the height of the saw blade, 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 recognized by the saw device 10 . Advantageously, the saw device 10 can be inquired about the current saw blade position being the second zero position via operation of the operating device 5, and the saw device 10 will then store the current position as the second zero position, particularly with respect to the end position of the saw blade 3. The present application relates to the invention described in the claims, but may also include the following as other aspects. 1. A sawing device (10), in particular a table circular saw or a cross-cut saw, comprising: a processing material placement section (2) for placing the processing material (1); A saw blade (3) and an electric actuator device (11) for adjusting the saw blade position (3) relative to the workpiece rest (2), In the sawing 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 sawing device (10) characterized by: 2. The saw device (10) 10. The saw device (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) The saw device (10) according to claim 1 or 2, characterized in that the first rotor movement is configured to detect the number of rotations of the first rotor (31) and / or the number of steps of the first rotor (31). 4. The electric actuator device (11) further comprises a second electric actuator (22); This second actuator is used to adjust 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 any one of claims 1 to 3, characterized in that 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 the second rotor (32) of the second actuator (22). 5. The saw device (10) 5. A saw device (10) according to any one of claims 1 to 4, characterized in that it is configured to perform a calibration movement of the saw blade (3) using the actuator device (11) in order to obtain calibration information and / or to perform positional equilibrium of the detected current saw blade position with the actual current saw blade position. 6. The calibration information is - travel range information, which represents the travel range of the saw blade (3) between two end positions of the saw blade (3); and / or the device comprises end position information, which indicates one or two end positions of the saw blade (3), and / or comprises zero position information, which indicates one or two zero positions of the saw blade (3); 6. The sawing device (10) according to item 5 above. 7. The saw device (10) according to claim 5 or 6, characterized in that the saw device (10) is configured to detect the position of the saw blade taking into account the calibration information. 8. The saw device (10) to test whether said calibration movement is necessary within the scope of a calibration test; and 8. The saw apparatus (10) of any one of claims 5 to 7, characterized in that if the calibration test reveals that the calibration movement is necessary, the saw apparatus (10) is configured to perform the calibration movement and / or to output a calibration notification. 9. In the calibration test, the saw device (10) - whether there are drive defects, such as blocking and / or slippage of the actuator device (11), and / or - whether a voltage fault, e.g. a previously occurring voltage loss, is present; and / or - whether the current saw blade position is detectable; and / or - whether an operating time value representing an operating time of the saw device exceeds an operating time threshold; 9. The saw device (10) according to claim 8, characterized in that it is configured to test the following: 10. The saw device (10) the calibration movement is carried out only during the presence of a user input, in particular an operation of the operating device (5) of the sawing device (10); and 10. The saw device (10) according to any one of claims 5 to 9, characterized in that it is configured 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 the calibration movement, the saw blade (3) is configured to perform a first calibration movement, in which the saw blade (3) is moved in a first degree of freedom (41) of the saw blade, and In the calibration movement, a second calibration movement is performed, in which the saw blade (3) is moved in a second degree of freedom (42) of the saw blade; and the saw device (10) is configured to perform the first calibration movement and the second calibration movement at least partially simultaneously; 11. The sawing device (10) according to any one of claims 5 to 10. 12. The saw device (10) 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 after this calibration movement, the sawing blade (3) is moved to the stored sawing blade position. 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 to one or both end positions of one of the degrees of freedom during the calibration movement only if the saw blade is not located in the end position of the other degree of freedom; 13. The sawing device (10) according to any one of claims 5 to 12. 14. A method for operating a sawing device (10) according to any one of claims 1 to 13, comprising: The method further comprises detecting the current saw blade position based on the first rotor movement; A method comprising the steps of:

Claims

1. A sawing device (10), in particular a table circular saw or a cross-cut saw, comprising: a processing material placement section (2) for placing processing material (1); A saw blade (3), as well as an electric actuator device (11) for adjusting the saw blade position of the saw blade (3) relative to the workpiece rest (2); In the sawing 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 sawing device (10) characterized in that

2. The saw device (10) 2. The sawing device (10) according to claim 1, characterized in that it is configured to detect the current saw blade position based on the first rotor movement without a position sensor.

3. The saw device (10) 2. The saw device (10) according to claim 1, 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 to adjust the saw blade position in a second degree of freedom (42), in particular the height of the saw blade, and 2. The saw device (10) of claim 1, wherein the saw device (10) is configured to detect a current saw blade position based on a first rotor movement and based on a second rotor movement of a second rotor (32) of a second actuator (22).

5. The saw device (10) 5. A saw device (10) according to claim 1, characterized in that it is configured to perform a calibration movement of the saw blade (3) using an actuator device (11) in order to obtain calibration information and / or to perform positional balancing 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 the device comprises end position information, which represents one or two end positions of the saw blade (3), and / or comprises zero position information, which represents one or two zero positions of the saw blade (3); 6. A sawing device (10) according to claim 5.

7. A sawing device (10) as described in claim 5, characterized in that the sawing device (10) is configured to detect the saw blade position taking into account calibration information.

8. The saw device (10) To test whether a calibration movement is necessary within the scope of the calibration test, and 6. The saw device (10) according to claim 5, characterized in that if the calibration test reveals that a calibration movement is necessary, the saw device is configured to perform this calibration movement and / or to output a calibration notification.

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

10. The saw device (10) The calibration movement is carried out only during the presence of a user input, in particular the operation of the operating device (5) of the sawing device (10), and 6. The saw device (10) according to claim 5, characterized in that it is configured 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 A sawing device (10) In the calibration movement, a first calibration movement is performed, in which the saw blade (3) is moved in a first degree of freedom (41) of the saw blade, and In the calibration movement, a second calibration movement is performed, in which the saw blade (3) is moved in a second degree of freedom (42) of the saw blade; and The saw device (10) is configured to perform the first and second calibration movements at least partially simultaneously, 6. A sawing device (10) according to claim 5.

12. The saw device (10) storing the current saw blade position before the calibration movement begins; and 6. A sawing device (10) according to claim 5, characterized in that it is configured 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 to one or both end positions of one degree of freedom in the calibration movement only if the saw blade is not located in the end position of the other degree of freedom.

6. A sawing device (10) according to claim 5.

14. 2. A method for operating a sawing device (10) according to claim 1, comprising: The method includes: detecting a current saw blade position based on a first rotor movement; A method comprising the steps of:

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