Electric tool and method

Abstract

The invention relates to an electric tool (20), in particular a sawing device, comprising a tool (8), in particular a saw blade, for machining a workpiece (9), wherein the electric tool (20) has an operator-control device (2) via which there can be input a parameter value of at least one parameter relating to an operation of the tool (8), for example a cutting depth and / or a cutting angle, wherein the operator-control device (2) has a setting element (3), which is configured as a turn / push switch, for inputting the parameter value, and a display unit (4) for displaying the at least one parameter value.

Description

[0001] Power tool and process

[0002] The invention relates to a power tool, in particular a sawing device, comprising a tool, in particular a saw blade, for machining a workpiece, wherein the power tool has an operating device via which a parameter value of at least one parameter related to an operation of the tool, for example a cutting depth and / or a cutting angle, can be entered.

[0003] EP3484662A1 describes a torque wrench configured to connect to a remote display device.

[0004] DE102005031025B4 describes a miter saw with a digital display for a miter angle and a bevel angle.

[0005] EP755744B1 describes an input device with rows of keys arranged on a panel of an operating unit.

[0006] One object of the invention is to improve the usability of the power tool. This object is achieved by a power tool according to claim 1. The operating device of the power tool has a setting element designed as a rotary push-button for entering the parameter value, as well as a display unit for displaying the parameter value.

[0007] The parameter value can be easily entered using the adjustment element. The parameter value displayed on the display unit allows the user to check whether the parameter value was entered correctly.

[0008] Advantageous further training is the subject of the dependent claims.

[0009] The invention further relates to a method for operating the power tool, comprising the step of entering the parameter value via the setting element.

[0010] Further exemplary details and exemplary

[0011] Embodiments are explained below with reference to the figures.

[0012] Figure 1 is a schematic representation of an electrical device,

[0013] Figure 2 is a perspective view of a power tool,

[0014] Figure 3 is a schematic representation of the power tool,

[0015] Figure 4 is a schematic representation of a

[0016] Operating device according to a first variant,

[0017] Figure 5 is a schematic representation of an operating device according to a second variant,

[0018] Figure 6 shows schematic representations of a stack memory, and Figure 7 shows a side view of the power tool.

[0019] In the following explanations, reference should be made to the x-direction, y-direction, and z-direction shown in the figures, which are orthogonal to each other. The x-direction and y-direction are horizontal directions, and the z-direction is vertical.

[0020] Figure 1 shows an electrical device 10, which is designed in particular as a power tool, for example, as a sawing device. The electrical device 10 comprises a functional unit 1, which is designed, for example, as a tool, in particular as a saw blade.

[0021] The electrical device 10 has an operating device 2, via which a parameter value of at least one parameter related to the operation of the functional unit 1, in particular the tool, can be entered. The at least one parameter includes, for example, a cutting depth (in particular as a first parameter) and / or a cutting angle (in particular as a second parameter). The operating device 2 can also be referred to as a human-machine interface.

[0022] The operating device 2 has a setting element 3, which is preferably designed as a rotary push-button. The setting element 3 serves to enter the parameter value. Preferably, at least two parameter values ​​of at least two different parameters related to the operation of the functional unit 1 can be entered via the setting element 3.

[0023] The rotary push-button is designed in particular as a rotary push-button wheel. The rotary push-button is expediently circular-cylindrical in shape. The rotary push-button is mounted so as to be rotatable about a rotational axis. Expediently, the parameter value to be entered using the rotary push-button, in particular one or more digits of the parameter value, can be increased by rotating the rotary push-button about the rotational axis in a first direction of rotation. Expediently, the parameter value to be entered using the rotary push-button, in particular one or more digits of the parameter value, can be decreased by rotating the rotary push-button about the rotational axis in a second direction of rotation. The second direction of rotation is opposite to the first direction of rotation. The electrical device 10 expediently comprises an incremental encoder which converts a rotary movement of the rotary push-button into an electrical signal, which is provided, for example, as an electrical operating signal.The rotary push-button can be pressed in particular in the axial direction of the rotation axis, for example to select one or more digits of the parameter value to be entered.

[0024] The operating device 2 further comprises a display unit 4 for displaying the at least one parameter value. The display unit 4 is, in particular, a graphic display, expediently a pixel display. The display unit 4 is, for example, an LCD or an OLED display. For example, the display unit 4 has a resolution of greater than 100x100 pixels, preferably of at least 240x240 pixels.

[0025] Preferably, the operating device 2 further comprises a selection element arrangement 5 for selecting a parameter as a current input parameter. The current input parameter is the parameter whose parameter value can currently be entered, in particular changed, using the setting element 3. In particular, one parameter from several possible parameters can be selected as the current input parameter via the selection element arrangement 5.

[0026] Preferably, the selection element arrangement 5 comprises selection elements 6, 7, 38. Each of the selection elements 6, 7, 38 is expediently assigned to a respective parameter in order to select the respective parameter as the current input parameter. Preferably, each of the selection elements 6, 7, 38 is assigned to a respective display area of ​​the display unit 4, in particular one used to display the respectively assigned parameter.

[0027] By way of example, the selection element arrangement 5 comprises a first selection element 6, in particular embodied as a first button, with which a first parameter, for example the cutting depth, can be selected as the current input parameter. Actuating the first selection element 6 selects the first parameter as the current input parameter, so that the parameter value of the first parameter (and in particular not the parameter value of a second parameter) can be entered via the setting element 3.

[0028] Preferably, the selection element arrangement 5 comprises a second selection element 7, particularly embodied as a second button, with which a second parameter, for example the cutting angle, can be selected as the current input parameter. Actuating the second selection element 7 selects the second parameter as the current input parameter, so that the parameter value of the second parameter (and in particular not the parameter value of the first parameter) can be entered via the setting element 3.

[0029] By way of example, the second selection element 7 is arranged below the first selection element 6, in particular such that the first selection element 6 and the second selection element 7 are aligned in the y-direction and / or spaced apart from one another in the z-direction. The first selection element 6 and the second selection element 7 expediently occupy the same area in the y-direction. The selection element arrangement 5, in particular the first selection element 6 and / or the second selection element 7, are expediently arranged next to the display unit 4 in the (particularly negative) y-direction.

[0030] As already explained above, the electrical device 10 is preferably designed as a sawing device. An exemplary embodiment of a corresponding sawing device will be explained in more detail below with reference to Figure 2.

[0031] First, other exemplary designs of the electrical device 10 will be discussed:

[0032] The electrical device 10 can, for example, be designed as a vacuum cleaner, and the functional unit 1 as a suction unit. In this case, the at least one parameter includes, in particular, the suction power of the suction unit.

[0033] The electrical device 10 can also be designed as a router or dowel cutter, and the functional unit as a milling cutter. For example, in this case, the at least one parameter includes (e.g., as the first parameter) a rotational speed of the milling cutter and / or (e.g., as the second parameter) a milling depth of the milling cutter. In another example, the at least one parameter includes (e.g., as the first parameter) a first parameter of a milling program and / or (e.g., as the second parameter) a second parameter of a milling program.

[0034] The electrical device 10 can also be designed as a spotlight, and the functional unit as a light source, for example, an LED unit. For example, in this case, the at least one parameter includes (e.g., as the first parameter) a color temperature of the light source and / or (e.g., as the second parameter) a brightness of the light source.

[0035] The electrical device 10 can also be designed as an audio output device, for example, as a radio, and the functional unit as a control unit for controlling the audio output. For example, in this case, the at least one parameter comprises (e.g., as the first parameter) a volume of the audio output device and / or (e.g., as the second parameter) a station identifier associated with a receivable station and / or a playlist identifier associated with a playable playlist.

[0036] Figure 2 shows a power tool 20, which is embodied, by way of example, as a sawing device, in particular as a circular table saw. The power tool 20 is an exemplary embodiment of the power device 10, so that the explanations relating to the power device 10 also apply to the power tool 20. In particular, the above explanations relating to the operating device 2 also apply to the operating device 2 of the power tool 20. The power tool 20 is preferably embodied as a semi-stationary machine. A semi-stationary machine is a machine that is stationary for processing a workpiece 9 and that can be carried by a single person.

[0037] The power tool 20 comprises a processing unit 12, exemplified as a sawing unit. By way of example, the sawing unit itself represents a circular table saw. Optionally, the power tool 20 further comprises a cover 14, which can be placed on the processing unit 12 and preferably fastened to the processing unit 12. Preferably, the power tool 20 can be selectively placed into a working configuration and a transport configuration. In the working configuration, the cover 14 is removed from the processing unit 12 so that the workpiece 9 can expediently be processed with a tool 8 of the processing unit 12. In the transport configuration, the cover 14 is placed on the processing unit 12 and expediently covers the tool 8 and / or a workpiece support surface 18 of the processing unit 12.

[0038] The power tool 20, in particular the processing unit 12, comprises the tool 8, which is designed in particular as a saw blade. The tool 8 is an example of the aforementioned functional unit 1. The tool 8 is used to process a workpiece 9. The saw blade is oriented, for example, with its saw blade plane perpendicular to the y-direction. The cutting direction of the saw blade runs, for example, parallel to the x-direction.

[0039] The power tool 20, in particular the processing unit

[0040] 12, comprises a support structure 11, which, for example, has a cuboid basic shape. The power tool 20, in particular the machining unit 12, can be placed on a base with the underside of the support structure 11 (in particular oriented perpendicular to the negative z-direction), in particular to assume a proper working position in which the workpiece 9 can be machined with the tool 8. The support structure 11 represents, for example, the outer housing of the machining unit 12.

[0041] The power tool 20 has the workpiece support surface 18, on which the workpiece 9 can be placed in order to machine the workpiece 9 with the tool 8. In the working position, the workpiece support surface 18 is expediently aligned perpendicular to the positive z-direction. For example, the workpiece support surface 18 is formed by the upper side of the support structure 11. For example, the tool 8 protrudes upward from an opening present in the workpiece support surface 18 and / or can protrude downward (in the negative z-direction) into the support structure 11.

[0042] The power tool 20 has the operating device 2, which is designed in particular as already explained above. The operating device 2 is expediently arranged on the support structure 11, in particular on a first circumferential side 21 of the support structure 11. The operating device 2 is arranged in particular on the outside of the support structure 11. The first circumferential side 21 extends from the underside of the support structure 11 upwards to the top side of the support structure 11. The first circumferential side 21 runs, for example, parallel to the y-direction. The first circumferential side 21 is in particular the side from which the workpiece 9 can be pushed onto the tool 8 in a feed direction running parallel to the positive x-direction in order to machine the workpiece 9 with the tool 8.The operating device 2 is arranged in particular on a section of the support structure or peripheral side arranged in front of the tool 8 in the feed direction, in particular such that the tool 8, as shown in Fig. 7, lies in the y-direction within the y-extension of the operating device 2.

[0043] In the transport configuration, the cover 14 expediently covers the operating device 2, in particular completely, so that the operating device 2 cannot be operated in the transport configuration. In the working configuration, the cover 14 expediently does not cover the operating device 2.

[0044] Figure 3 shows a schematic representation of the power tool 20, in particular the processing unit 12.

[0045] The power tool 20 comprises a control unit 15, which is arranged in particular in the support structure 11. The control unit 15 comprises, for example, a microcontroller. The control unit 15 is communicatively connected to the operating device 2. The control unit 15 expediently receives at least one electrical operating signal from the operating device 2. The at least one electrical operating signal expediently represents an actuation of the operating device 2, in particular of the setting element 3 and / or the selection element arrangement 5. The control unit 15 is expediently communicatively connected to the display unit 4. The control unit 15 expediently outputs at least one electrical display signal to the display unit 4, in particular taking into account a user input performed with the operating device 2, in particular taking into account the at least one electrical operating signal.

[0046] The power tool 20, in particular the processing unit 12, expediently comprises a tool drive unit 16, which serves to set the tool 8 in a processing movement by which the workpiece 9 can be processed. The tool drive unit 16 expediently comprises an electric drive motor for driving the tool 8. The processing movement is, for example, a rotary movement of the saw blade, in particular about a rotational axis running parallel to the y-axis. The tool drive unit 16 is expediently arranged in the support structure 11. Expediently, the control unit 15 is designed to control the tool drive unit 16 with at least one drive signal, in particular based on a user input performed with the operating device 2, in order to determine the drive of the tool 8.

[0047] The power tool 20, in particular the processing unit 12, preferably comprises a positioning device 17 having at least one electric motor for providing a displacement movement of the tool 8. The positioning device 17 is preferably arranged in the support structure 11.

[0048] The power tool 20 is designed to carry out the travel movement for the purpose of repositioning the tool 8 and / or for the purpose of a calibration run of the tool 8.

[0049] The repositioning of the tool 8 is expediently carried out relative to the workpiece support surface 18 and serves to determine a first and / or a second parameter, in particular the cutting depth and / or the cutting angle.

[0050] The calibration run expediently serves to detect one or more reference positions, for example, a maximum position, a minimum position, and / or a zero position of the tool 8. For example, the tool 8 is moved to one or more reference positions during the calibration run. Expediently, the power tool 20 does not have any absolute sensors for detecting the position of the tool 8 and / or is configured to determine the position of the tool 8 incrementally, in particular taking into account one or more reference positions detected during the calibration run.

[0051] By way of example, the positioning device 17 comprises a first positioning electric motor 31 for setting a first parameter, in particular a height of the tool 8, in particular to determine the cutting depth. By means of the first positioning electric motor 31, the tool 8 can be expediently positioned or moved in the z-direction, in particular relative to the workpiece support surface 18. In particular, the tool 8 can be set into a first, in particular linear, travel movement 41 by means of the first positioning electric motor.

[0052] By way of example, the positioning device 17 comprises a second positioning electric motor 32 for setting a second parameter, for example an angle, of the tool 8, in particular to determine the cutting angle. By means of the second positioning electric motor 32, the tool 8 can expediently be pivoted about a pivot axis, in particular running in the y-direction, or can be moved in a plane containing the z-direction perpendicular to the feed direction or x-direction, in particular relative to the workpiece support surface 18. In particular, the tool 8 can be set into a second travel movement 42 by means of the second positioning electric motor 32. The second travel movement is preferably a pivoting movement.

[0053] For example, the parameter value of the first parameter, in particular the cutting depth, can be changed by selecting the first parameter, in particular the cutting depth, as the current input parameter and then rotating the adjustment element 3. Preferably, the power tool 20 is configured to position the tool 8 according to the parameter value using the first positioning electric motor 31 at the same time as the parameter value is changed by rotating the adjustment element 3.

[0054] For example, the parameter value of the second parameter, in particular the cutting angle, can be changed by selecting the second parameter, in particular the cutting angle, as the current input parameter and then rotating the adjustment element 3. Preferably, the power tool 20 is configured to position the tool 8 according to the changed parameter value using the second positioning electric motor 32, simultaneously with the change in the parameter value caused by rotating the adjustment element 3.

[0055] Rotating the setting element 3 expediently causes the parameter value of the current input parameter displayed on the display unit 4 to change, and simultaneously causes the tool 8 to be positioned by the positioning device 17 according to the displayed (changed) parameter value. Preferably, the power tool 20 is configured to perform the travel movement only while the operating device, in particular the setting element, is being actuated, and to stop the travel movement in response to the fact that the operating device, in particular the setting element, is no longer being actuated.

[0056] Preferably, the power tool 20 is designed to perform the travel movement only when the tool 8 is not in the machining movement.

[0057] In particular, the control unit 15 is designed to check, in particular continuously check, whether the adjusting element 3 is actuated, for example, whether the adjusting element 3 is rotated, in particular based on the electrical operating signal, and to effect the travel movement by controlling the positioning device 17 only as long as the adjusting element 3 is actuated. Preferably, the control unit 15 is designed to carry out the continuous test with a sampling rate of at least 20 Hertz, preferably of at least 100 Hertz. The speed of a linear travel movement is, for example, at least 5 millimeters / second. In a preferred embodiment, the linear travel movement is 10 millimeters / second. The speed of a rotary travel movement is, for example, at least 4 degrees / second. In a preferred embodiment, the speed of the rotary travel movement is 6.5 degrees / second.

[0058] Preferably, the operating device 2 is actuated for the purpose of changing the parameter value, for example, increasing or decreasing the parameter value. Such a change in the parameter value is an example of an input of the parameter value. The power tool 20 is designed to position the tool 8 by means of the traversing movement according to the changed parameter value. Preferably, the power tool 20 is designed to display the changing parameter value on the display unit 4 during the change in the parameter value and during the traversing movement.

[0059] The user can, in particular, increase or decrease the parameter value displayed on the display unit 4 by rotating the setting element 3, and the power tool 20 simultaneously moves the tool 8 to increase or decrease the value, in particular in such a way that the parameter value displayed on the display unit 4 always describes the current position of the tool 8.

[0060] For an automatic and / or electronically controlled movement (e.g. the travel movement) of the saw blade of the power tool 20, a user input (e.g. turning the adjusting element 3) is expediently required for the duration of the movement.

[0061] In particular, the saw blade is moved only when the adjustment element 3 is actuated, preferably when the adjustment element 3 is rotated. Optionally, the intensity of the input (e.g., the rotational speed of the adjustment element 3) has no influence on the travel speed.

[0062] For example, a desired, in particular predefined or previously user-defined, tool position, in particular a saw blade position, for example a parameter presetting 39, a parking position and / or a change position can be selected (in particular via the operating device 2), and / or a calibration run can be selected. The calibration run relates to the first parameter, in particular the cutting angle, and / or the second parameter, in particular the cutting depth, and is carried out in particular by approaching end positions. The parking position is a position of the tool, in particular the saw blade, in which the tool, in particular the saw blade, is positioned deep enough that the cover hood 14 can be placed on the processing unit 12 and fastened thereto.The change position is a position of the tool, in particular the saw blade, in which the tool, in particular the saw blade, can be removed or changed, in particular changed by the user.

[0063] The power tool 20 is designed to move the tool, in particular the saw blade, for the purpose of moving to the desired tool position, in particular the saw blade position, and / or for carrying out the calibration run, only when the rotary-push button is turned or pressed, and only for as long as the rotary-push button is turned or pressed. This can expediently reduce the risk of a user inadvertently touching the saw blade during movement in a small (portable, mobile or hand-held) sawing device. According to an alternative embodiment, instead of an input via the rotary-push button, an input via another suitable user input element is required for the tool, in particular the saw blade, to be moved. The power tool 20 is expediently designed, in response to the user input (e.g.If pressing or turning the adjustment element 3) is terminated before the desired saw blade position is reached and / or the calibration run is completed, the travel movement of the saw blade is stopped and expediently a (particularly optical) signal, in particular an error message, is output, in particular displayed, in particular via the display unit 4 and / or a drive of the saw blade is prevented. The travel movement can expediently be continued by a further user input (e.g., pressing or turning the adjustment element 3).

[0064] As mentioned above, the travel movement occurs in particular as part of a calibration run. Preferably, the power tool 20 is configured to interrupt or abort the calibration run if the rotary push-button is no longer rotated before the saw blade's calibration run is completed.

[0065] Optionally, the power tool 20, in particular the processing unit 12, has a communication interface 19 for communicating with a mobile device 30. The mobile device 30 is, for example, a mobile phone or a tablet. Communication between the communication interface 19 and the mobile device 30 is preferably wireless, in particular via Bluetooth, WLAN, mobile radio, and / or NFC.

[0066] The power tool 20, in particular the processing unit 12, expediently has a fan wheel 33, which serves in particular to generate an air flow to cool the power tool 20. The fan wheel 33 is expediently coupled to the tool 8, in particular such that the fan wheel 33 is driven together with the tool 8 by the tool drive unit 16. The power tool 20 preferably has a cooling mode in which the tool 8 is driven at a reduced speed in order to cool the power tool 20 via the fan wheel 33 of the power tool 20 coupled to the tool 8. The reduced speed is in particular reduced compared to a processing speed used to process the workpiece 9.The power tool 20 is configured to output, in particular to display, an announcement signal before entering the cooling mode, which indicates that the power tool 20 will enter the cooling mode and / or to output a cooling mode signal during the cooling mode, in particular to display it, which indicates that the power tool 20 is in the cooling mode. The announcement signal and / or the cooling mode signal are expediently output, in particular displayed, via the display unit 4, in particular as a respective message displayed on the display unit 4.

[0067] The operating device 2 will be discussed in more detail below. The operating device 2 explained below is, in particular, the operating device 2 of the electrical device 10 and / or the electrical tool 20, in particular the sawing device.

[0068] The operating device 2 preferably has a tool drive operating arrangement 34, via which a drive of the tool 8 can be switched on and / or off to set the tool 8 in the machining movement. The tool 8 is driven by means of the tool drive unit 16. The control unit 15 expediently controls the tool drive unit 16 in accordance with a user input made via the tool drive operating arrangement 34. The tool drive operating arrangement 34 comprises, for example, an on button 35 for switching on the drive of the tool 8 and / or an off button 36 for switching off the drive of the tool 8. The tool drive operating arrangement 34, in particular the on button 35 and / or the off button 36, are arranged, for example, on the first circumferential side 21. For example, the tool drive operating arrangement 34 is arranged next to the adjustment element 3, in particular to the right of the adjustment element 3.For example, the off button 36 is arranged below the on button 35.

[0069] The power tool 20, in particular the processing unit 12, preferably further comprises a main on / off switch 37, via which the power tool 20, in particular the operating device 2, can be switched on and / or off. Expediently, the power tool 20, in particular the control unit 15, can be put into an off state by actuating the main on / off switch 37, in which state the drive of the tool 8 cannot be switched on via the tool drive operating arrangement 34. The main on / off switch 37 is arranged, for example, at a distance from the tool drive operating arrangement 34. For example, the main on / off switch 37 is arranged on a second circumferential side 22 of the support structure 11. The second circumferential side 22 runs, for example, parallel to the x-direction.

[0070] The display unit 4 is preferably configured to display a first parameter value 51 of the first parameter and a second parameter value 52 of the second parameter. The first parameter value 51 is, in particular, the current value of the first parameter, and the second parameter value 52 is, in particular, the current value of the second parameter. By way of example, the display unit 4 displays the parameter values ​​51, 52 one below the other. The display unit 4 expediently displays the parameter values ​​as numerical elements, in particular by displaying numbers, for example, Arabic numerals.

[0071] Preferably, the first selection element 6 is arranged in spatial association with the first parameter value 51 and / or the second selection element 7 is arranged in spatial association with the second parameter value 52. By way of example, the first selection element 6 occupies a first z-range and the first parameter value 51 is arranged in the first z-range. By way of example, the second selection element 7 occupies a second z-range different from the first z-range and the second parameter value 52 is arranged in the second z-range. Expediently, the first z-range, the first selection element 6 and / or the first parameter value 51 is arranged exclusively above an imaginary straight line running in the y-direction and / or the second z-range, the second selection element 7 and / or the second parameter value 52 is arranged exclusively below the imaginary straight line running in the y-direction.

[0072] Figure 4 shows an operating device 2 according to a first variant. This operating device shall also be referred to as the first operating device 2A. The operating device 2 comprises, by way of example, at least two, in particular exactly two, selection elements 6, 7, which expediently together have the same vertical extension as the display unit 4 and are vertically aligned with the display unit 4. By way of example, the power tool 20 is designed as a hand-held circular saw or a table saw, and the first parameter is, for example, the cutting depth and / or the second parameter is the cutting angle.

[0073] Furthermore, the power tool 20 can be designed as a miter saw and the first parameter can be, for example, a miter angle and / or the second parameter can be, for example, an inclination angle (in particular adjustable perpendicular to the miter angle).

[0074] Figure 5 shows an operating device 2 according to a second variant. This operating device shall also be referred to as the second operating device 2B.

[0075] By way of example, the selection element arrangement 5 further comprises a third selection element 38, in particular designed as a third button, with which a third parameter can be selected as the current input parameter. Actuating the third selection element 38 selects the third parameter as the current input parameter, so that the parameter value of the third parameter can be set via the setting element

[0076] 3 can be entered.

[0077] The operating device 2 comprises, by way of example, at least three, in particular exactly three, selection elements 6, 7, 38, which expediently together have the same vertical extension as the display unit 4 and are connected to the display unit

[0078] 4 vertically aligned.

[0079] Preferably, the display unit 4 is configured to display a third parameter value 53 of the third parameter. The third parameter value 53 is, in particular, the current value of the third parameter. Preferably, the third selection element 38 is arranged in spatial association with the third parameter value 53. By way of example, the third selection element 38 occupies a third z-range different from the first z-range and the second z-range, and the third parameter value 53 is arranged in the third z-range.

[0080] Conveniently, the third z-range, the third selection element 38 and / or the third parameter value 53 is / are arranged exclusively below a second imaginary straight line running in the y-direction, and / or the first z-range, the first selection element 6 and / or the first parameter value 51, and / or the second z-range, the second selection element 7 and / or the second parameter value 52 is / are arranged exclusively above the imaginary second straight line running in the y-direction.

[0081] By way of example, the power tool 20 is designed as a hand-held circular saw or as a table saw and the first parameter is, for example, the cutting depth and / or the second parameter is the cutting angle and / or the third parameter is a rotational speed of the saw blade.

[0082] The adjustment element 3 preferably has two input modes. The two input modes preferably comprise a pressed input mode and a non-pressed input mode. In the pressed input mode, the adjustment element 3 is rotated while being pressed by the user, in particular in the axial direction of the axis of rotation about which the adjustment element 3 is rotatable. In the non-pressed input mode, the adjustment element 3 is rotated while not being pressed, in particular not in the axial direction of its axis of rotation. Preferably, one of the input modes, for example the non-pressed input mode, is used to enter at least one pre-decimal place of the parameter value of the current input parameter and / or the other input mode, for example the pressed input mode, is used to enter at least one decimal place of the parameter value of the current input parameter.Conveniently, one input mode allows several, in particular all, pre-decimal places of the parameter value to be entered, and / or the other input mode allows several, in particular all, decimal places of the parameter value to be entered. Conveniently, one input mode, in particular the non-pressed input mode, allows only one or more pre-decimal places (and in particular no decimal places) to be entered, and / or the other input mode, in particular the pressed input mode, allows only one or more decimal places (and in particular no pre-decimal places) to be entered.The control unit 15 is expediently designed to interpret a rotation of the setting element 3 in a non-pressed state of the setting element 3 as an input of one or more pre-decimal places of the parameter value and / or to interpret a rotation of the setting element 3 in a pressed state as an input of one or more decimal places of the parameter value.

[0083] According to an alternative embodiment, in the pressed input mode, the setting element 3 is rotated while the selection element associated with the parameter selected as the current input parameter is pressed.

[0084] Preferably, all parameter values ​​that can be entered can be entered via the setting element 3—in particular, via the rotary push button. The power tool 20 expediently does not have a touchscreen, a letter block, or a numeric keypad for entering a parameter value.

[0085] Preferably, a main menu can be called up by pressing the setting element 3 twice. The main menu comprises a plurality of menu elements that are displayed on the display unit 4, in particular one below the other. Conveniently, a menu element can be selected from several possible menu elements by turning the setting element 3, and the selection of the menu element can be confirmed by pressing the setting element 3.

[0086] The power tool 20 is preferably designed to display a plurality of selectable parameter presets 39 simultaneously on the display unit 4. The parameter presets 39 can also be referred to as parameter favorites or parameter presets. Preferably, each parameter preset 39 can comprise respective parameter values ​​of the parameters selectable by the selection elements, in particular all parameters selectable by the selection elements. Preferably, each parameter preset 39 can comprise two parameter values ​​of two different parameters. The parameter values ​​of a parameter preset 39 should also be referred to as preset parameter values. The parameter presets 39 are expediently displayed one below the other on the display unit 4, in particular to the side next to the first parameter value 51 and / or the second parameter value 52 and / or (if present) the third parameter value (53).Conveniently, the parameter presets 39 are displayed simultaneously with the parameter values ​​51, 52, and / or 53. In particular, the parameter presets 39 are displayed as a list on the display unit 4. The list expediently extends over the entire height of the display unit 4. For example, at least two, at least three, or at least four parameter presets 39 are displayed simultaneously on the display unit 4.

[0087] Alternatively, it can be provided that each parameter preset 39 comprises only one parameter value of a single parameter. In this case, each parameter preset 39 is expediently arranged in the z-range of the selection element associated with the parameter to which the respective parameter preset 39 refers.

[0088] Preferably, not all existing parameter presets 39 are displayed simultaneously and / or by turning the setting element 3 one can scroll through all existing parameter presets 39.

[0089] Optionally, the power tool 20 can be configured to display a parking position symbol on the display unit 4 in response to the tool, in particular the saw blade, not being in a parking position, so that the cover 14 cannot be correctly placed on and / or fastened to the processing unit 12 due to the current position of the tool, in particular the saw blade, and / or to the processing unit 12. Upon selection of the parking position symbol, the tool, in particular the saw blade, can be placed into the parking position. The parking position symbol can be displayed, for example, in the list of presets 39. Optionally, the power tool 20 can be configured not to display the parking position symbol in response to the tool, in particular the saw blade, being in the parking position, so that the cover 14 can be correctly placed on and / or fastened to the processing unit 12.As shown by way of example in Figure 4, each parameter preset 39 can comprise a first preset parameter value for the first parameter, for example, the cutting depth, and / or a second preset parameter value for the second parameter, for example, the cutting angle. Each parameter preset 39 is displayed by way of example on the display unit 4 by displaying the preset parameter values ​​respectively associated with the parameter preset 39, in particular as numerical elements, one below the other.

[0090] As shown by way of example in Figure 5, each parameter preset 39 can optionally comprise up to three preset parameter values, which are conveniently displayed one below the other.

[0091] Preferably, currently set parameter values ​​can be saved as parameter presets 39 by simultaneously pressing at least two selection elements—for example, the first selection element 6 and the second selection element 7. The currently set parameter values ​​are, in particular, the currently displayed first parameter value 51 and / or the currently displayed second parameter value 52 and / or (if present) the currently displayed third parameter value 53.

[0092] Preferably, by pressing the associated selection element, one of the currently set parameter values ​​can be deselected to ensure that this currently set parameter value is not saved when saving a parameter preset 39. Optionally, the deselection of the parameter value can be undone by pressing the associated selection element again. Optionally, the storage position of a newly saved parameter preset 39, in particular within the list, can be determined via the setting element 3, in particular only via the setting element 3, in particular by rotating the setting element 3 to select the storage position and then pressing the setting element 3 to confirm the selection.

[0093] Optionally, the power tool 20 is configured to receive at least one of the parameter presets 39 from the mobile device 30 via the communication interface 19. The power tool 20 preferably has personalized parameter presets, which were received, for example, from the mobile device 30, and non-personalized parameter presets, which were not received, for example, from the mobile device 30. The power tool 20 is expediently configured to handle the personalized parameter presets differently than the non-personalized parameter presets. For example, the power tool 20 is configured to display the personalized parameter presets and / or not display the non-personalized parameter presets during a coupling with the mobile device 30.For example, the power tool 20 is configured to no longer display the personalized parameter presets and / or to display the non-personalized parameter presets after the pairing with the mobile device 30 has been terminated.

[0094] Preferably, the parameter presets 39 can be scrolled through by rotating the adjustment element 3 to select a parameter preset 39, and the selected parameter preset 39 can be activated by pressing the adjustment element 3. By activating the parameter preset 39, the preset parameter values ​​of the selected parameter preset 39 are set as the first parameter value 51, the second parameter value 52, and (if present) the third parameter value 53.

[0095] Preferably, the power tool 20, in particular the control unit 15, is designed to implement a rotation of the setting element 3 as scrolling through the parameter presets 39 when no parameter is selected as the current input parameter.

[0096] Optionally, the power tool 20 has a passive operating mode in which the tool 8 cannot be set into the machining movement for machining the workpiece 9. For example, in the passive operating mode, the control unit 15 blocks the drive of the tool 8 (which can be provided in particular via the tool drive unit 16). In the passive operating mode, the power tool 20 displays instruction information via the display unit 4 in order to expediently inform a user about the intended use of the power tool 20. The power tool 20 also has an active operating mode in which the tool 8 can be set into the machining movement. For example, in the active operating mode, the control unit 15 enables the drive of the tool 8 via the tool drive unit 16.Optionally, when the power tool 20 is put into operation - in particular when the power tool 20 is switched on for the first time - the control unit 15 automatically causes the power tool 20 to first enter the passive operating mode and expediently only changes to the active operating mode after one or more actuations of the setting element 3, by which one or more displayed operating instructions information is confirmed.

[0097] The power tool 20 is preferably configured to indicate the passive operating mode and / or the active operating mode by a respective display operating mode of the display unit 4, in particular by a respective background brightness. For example, in the passive operating mode, the control unit 15 sets a darker background brightness of the display unit 4 than in the active operating mode. Background brightness refers, for example, to the brightness of the hue of the background color. For example, in the passive operating mode, the control unit 15 sets a darker hue of the background color of the display unit 4 than in the active operating mode.

[0098] The power tool 20 preferably has a display stack 43. Figure 6 shows schematic representations of an exemplary display stack 43 in three different states. The display stack 43 is implemented, for example, via software, in particular in the control unit 15.

[0099] Message objects 44A, 44B, 44C are stored in the display stack 43, which are assigned to the respective messages, in particular error messages, to be displayed on the display unit 4. In the first state shown on the left, a first message object 44A and a second message object 44B are stored in the display stack 43. In the second state shown in the middle, a third message object 44C has been added. In the third state shown on the right, only the second message object is present in the display stack 43. The power tool 20 is designed to display, in particular to display in full, the message on the display unit 4 that is assigned to the message object located in the first position in the display stack 43. This message shall also be referred to as the current display message.The power tool 20 is expediently designed not to display the other messages - that is, those messages assigned to the message objects that are not located in the first position - and / or to display them only partially, for example partially hidden from the current display message. In the state shown on the left, the power tool 20 displays the message assigned to the first message object 44A (located in the first position) in full on the display unit 4 and does not display, or only partially displays, the message assigned to the second message object. In the state shown in the middle, the power tool 20 displays the message assigned to the third message object 44C (located in the first position) in full on the display unit 4 and does not display, or only partially displays, the messages assigned to the other message objects 44A, 44B.In the state shown on the right, the power tool 20 displays the message assigned to the second message object 44B (located at the first position) in full on the display unit 4.

[0100] The power tool 20 is expediently designed, in response to a confirmation input performed with the operating device 2 (in particular by a user), to remove the message object located in the first position from the display stack 43, so that the downstream message objects each move forward one position. The confirmation input is made, for example, with the setting element 3, in particular by pressing the setting element 3. For example, in the transition from the state shown in the middle of Figure 6 to the state shown on the right, a confirmation input is initially made for the third message object 44C located in the first position, whereby the third message object 44C is removed from the display stack 43 and the first message object 44A and the second message object move forward one position, so that the first message object 44A is in the first position.A confirmation input is then made for the first message object 44A, which is now in the first position, whereby the first message object 44A is removed from the display stack 43 and the second message object 44B moves forward one position, so that the second message object 44B is in the first position.

[0101] Conveniently, the power tool 20 is configured, in response to a predetermined event that triggers a further message, to place a message object associated with the further message in the first position in the stack memory 43 and to move the message objects previously present in the stack memory 43 one position back. The predetermined event is, for example, an error event that is detected by the control unit 15. For example, in the transition from the state shown on the left in Figure 6 to the state shown in the middle, a predetermined event occurs that triggers a message associated with the third message object 44C, so that the third message object 44C is placed in the first position in the stack memory 43 and the message objects 44A, 44B previously present in the stack memory are each moved one position back.

[0102] The control unit 15 is particularly designed on the

[0103] Display unit 4 is designed to always display the most recent message and to cover one or more previously displayed messages with the most recent message. The control unit 15 is expediently designed to remove the most recent message in response to the confirmation input made with the operating device 2 and to display the message that was previously covered by the most recent message that was then removed.

[0104] The power tool 20 can be conveniently operated using a method comprising the step of: entering the parameter value via the setting element 3.

[0105] Preferably, the first parameter is first selected as the current input parameter by actuating the first selection element 6. Then, expediently, the parameter value of the current input parameter—i.e., the first parameter—is changed and thus entered by rotating the setting element 3. For example, the setting element 3 is first rotated in the non-pressed input mode in order to change one or more pre-decimal places of the parameter value and thereby enter it. The parameter value is displayed on the display unit 4 during this process. Preferably, while the setting element 3 is rotated, the power tool 20 positions the tool 8 according to the changed (and currently displayed) parameter value. As soon as the rotation of the setting element 3 is terminated, the power tool 20 stops a travel movement of the tool 8 performed for the purpose of positioning the tool 8.For example, the adjustment element 3 is then rotated while the input mode is pressed to change one or more decimal places of the parameter value and thereby enter it. The parameter value is displayed on the display unit 4 during this time.

[0106] Preferably, the power tool 20 positions the tool 8 according to the changed (and currently displayed) parameter value while rotating the adjustment element 3. As soon as the rotation of the adjustment element 3 is stopped, the power tool 20 stops a travel movement of the tool 8 performed for the purpose of positioning the tool 8.

[0107] The second parameter is then expediently selected as the current input parameter by actuating the second selection element 7. The parameter value is then expediently entered in the same manner as explained above in connection with the parameter value of the first parameter.

[0108] Optionally, the power tool 20 may be operated using a method comprising the steps of:

[0109] - Provision of message objects 44A, 44B, 44C, which are assigned to the respective messages to be displayed on the display unit 4, in particular error messages,

[0110] - Displaying the message that is assigned to the message object located in the first position in the display stack 43,

[0111] - in response to a confirmation input made with the operating device 2, removing the message object located in the first position from the stack memory 43, so that the subordinate message objects each move one position forward, and / or

[0112] - in response to a predetermined event that triggers a further message, placing a message object associated with the further message at the first position in the stack 43, and moving the message objects previously present in the stack one position back.

Claims

Claims 1. Power tool (20), in particular a sawing device, comprising a tool (8), in particular a saw blade, for machining a workpiece (9), wherein the power tool (20) has an operating device (2) via which a parameter value of at least one parameter relating to an operation of the tool (8), for example a cutting depth and / or a cutting angle, can be entered, wherein the operating device (2) has an adjusting element (3) designed as a rotary push-button for entering the parameter value, and a display unit (4) for displaying the at least one parameter value.

2. Power tool (20) according to claim 1, further comprising a selection element arrangement (5) for selecting a parameter as a current input parameter, the parameter value of which can be currently entered using the setting element (3).

3. Power tool (20) according to claim 2, wherein the selection element arrangement (5) comprises a first selection element (6), in particular designed as a first button, with which a first parameter, for example the cutting depth, can be selected as the current input parameter, and wherein the selection element arrangement (5) comprises a second selection element (7), in particular designed as a second button features a second parameter, such as the cutting angle, that can be selected as the current input parameter.

4. Power tool (20) according to claim 3, wherein the display unit (4) is configured to display a first parameter value (51) of the first parameter and a second parameter value (52) of the second parameter, wherein the first selection element (6) is arranged in spatial relation to the first parameter value and the second selection element (7) is arranged in spatial relation to the second parameter value.

5. Power tool (20) according to a preceding claim, wherein the setting element (3) has two input modes, namely a pressed input mode and a non-pressed input mode, and one of the input modes is used to input at least one integer digit of the parameter value and the other input mode is used to input at least one decimal digit of the parameter value.

6. Power tool (20) according to a preceding claim, wherein all parameter values ​​that can be entered into the power tool (20) can be entered via the setting element (3), and the power tool (20) in particular does not have a touchscreen, a letter pad and a numeric keypad for entering a parameter value.

7. Power tool (20) according to a preceding claim, wherein a main menu can be accessed by pressing the setting element (3) twice.

8. Power tool (20) according to a preceding claim, wherein the power tool (20) is designed on the Display unit (4) to display several selectable parameter presets (39) simultaneously, wherein each parameter preset (39) includes at least two preset parameter values ​​of two different parameters.

9. Power tool (20) according to claim 8 in combination with claim 3 wherein currently set parameter values ​​can be saved as parameter presets by simultaneously pressing the two selection elements (6, 7).

10. Power tool (20) according to claim 8 or 9, further comprising a communication interface (19) for communication with a mobile device (30), in particular a mobile phone, wherein the power tool (20) is configured to receive at least one of the parameter presets (39) from the mobile device (30) via the communication interface (19).

11. Power tool (20) according to one of claims 8 to 10, wherein it is possible to scroll through the parameter presets (39) by rotating the adjusting element (3) in order to select a parameter preset (39), and to activate the selected parameter preset (39) by pressing the adjusting element (3).

12. Power tool (20) according to one of the preceding claims, further comprising a positioning device (17) having at least one electric motor for providing a traversing movement of the tool (8), wherein the power tool (20) is configured to perform the traversing movement for the purpose of repositioning the tool (8) and / or for the purpose of a calibration run of the tool (8), and wherein the power tool (20) is designed to perform the traversing movement only while the operating device (2), in particular the adjusting element (3), is being actuated, and to stop the traversing movement in response to the fact that the operating device (2), in particular the adjusting element, is no longer being actuated.

13. Power tool (20) according to claim 12, wherein the actuation of the operating device (2) is carried out for the purpose of changing the parameter value and the power tool is designed to position the tool (8) by means of the traversing movement according to the changed parameter value.

14. Power tool (20) according to claim 13, wherein the power tool (20) is configured to display the changing parameter value on the display unit (4) during the change of the parameter value and the traversing movement.

15. Power tool (20) according to one of the preceding claims, wherein the power tool (20) has a passive operating mode in which the tool (8) cannot be moved into a machining motion to machine the workpiece (9), and in which the power tool (20) displays operating instructions via the display unit (4) to inform a user about the proper handling of the power tool (20), and wherein the power tool (20) further has an active operating mode in which the tool (8) can be moved into the machining motion.

16. Power tool (20) according to claim 15, wherein the power tool (20) is configured to the passive to indicate the operating mode and / or the active operating mode by means of a respective display operating mode of the display unit (4), in particular by means of a respective background brightness .

17. Power tool (20) according to a preceding claim, wherein the operating device (2) has a tool drive operating arrangement (34) by means of which a drive of the tool (8) for moving the tool (8) into a machining movement can be switched on and / or off, wherein the power tool (20) further has a main on / off switch (37) by means of which the power tool (20), in particular the operating device (2), can be switched on and / or off.

18. Power tool (20) according to a preceding claim, wherein the power tool (20) has a display stack memory (43) in which message objects (44A, 44B, 44C) are stored, which are assigned to the respective messages to be displayed on the display unit (4), in particular error messages, wherein the power tool (20) is configured to display the message that is assigned to the message object located in the first position in the display stack memory (43), and in response to a confirmation input made with the operating device (2) to remove the message object located in the first position from the stack memory (43), so that the subsequent message objects each move forward one position, and / or in response to a predetermined event that triggers a further message,to place a message object associated with the next message in the first position in the stack (43) and to move the message objects previously present in the stack one position backwards.

19. Power tool (20) according to a preceding claim, wherein the power tool (20) has a cooling mode in which the tool (8) is driven at a reduced speed to cause cooling of the power tool (20) via a fan wheel (33) coupled to the tool (8), wherein the power tool (20) is configured to output an advance warning signal before entering the cooling mode, indicating that the power tool (20) will enter the cooling mode, and / or to output a cooling mode signal during the cooling mode, indicating that the power tool (20) is in the cooling mode.

20. Method for operating a power tool (20) according to one of the preceding claims, comprising the step: inputting the parameter value via the setting element (3).

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