Method for operating a rotating laser and rotating laser

Abstract

The invention relates to a method for operating a rotary laser, which can be operated at least in a first operating mode or in a second operating mode and has a housing in which a drive unit for rotating a laser beam is arranged, the drive unit having a stator and a rotor for rotating a spindle, wherein the drive unit is equipped with a control and regulating unit for operating the drive unit, the method comprising the following steps: in response to a selection of the first operating mode, operating the drive unit by means of the control and regulating unit in a first operating mode which is assigned to the first operating mode, the first operating mode being equipped with a brushless DC motor logic (521); in response to a selection of the second operating mode, operating the drive unit by means of the control and regulating unit in a second operating mode which is assigned to the second operating mode, the second operating mode being equipped with a stepper motor logic (531); and driving the drive unit in the first operating mode or driving the drive unit in the second operating mode.

Description

Technical Field

[0001] The present invention relates to a method for operating a rotating laser, the rotating laser being capable of operating in at least a first operating mode or a second operating mode and having a housing in which a drive unit for rotating a laser beam is arranged, the drive unit having a stator and a rotor for rotatably driving a main shaft, wherein the drive unit is equipped with a control and adjustment unit for manipulating the drive unit. Background Technology

[0002] A method for operating a rotating laser is known from the prior art, wherein the rotating laser can operate in a first or a second operating mode. For this purpose, the rotating laser has a housing in which a drive unit for rotating a laser beam is arranged, the drive unit having a stator and a rotor for rotatably driving a spindle. The drive unit is equipped with a control and adjustment unit for manipulating the drive unit. In response to the selection of a first operating mode, the control and adjustment unit operates the drive unit in an operation mode corresponding to the first operating mode. In response to the selection of a second operating mode, the control and adjustment unit operates the drive unit in an operation mode corresponding to the first operating mode and applies a holding torque of the mechanism for forming the second operating mode to the drive unit. Summary of the Invention

[0003] This invention relates to a method for operating a rotating laser, the rotating laser being capable of operating in at least a first operating mode or a second operating mode and having a housing in which a drive unit for rotating a laser beam is arranged, the drive unit having a stator and a rotor for rotatably driving a main shaft, wherein the drive unit is equipped with a control and adjustment unit for manipulating the drive unit. The method includes the following steps: - In response to the selection of a first operating mode, the drive unit is controlled by the control and adjustment unit in a first operating mode corresponding to the first operating mode, the first operating mode being equipped with brushless DC motor logic. - In response to the selection of a second operating mode, the drive unit is operated via a control and adjustment unit in a second operating mode corresponding to the second operating mode, the second operating mode being equipped with stepper motor logic, and - The drive unit is driven in a first operating mode or in a second operating mode, wherein the drive unit can be driven with multiple drive voltages, the drive voltages being assigned to the selected operating mode and determined based on the current angular position of the spindle.

[0004] Therefore, the present invention can provide a method for operating a rotating laser, wherein operation in a first or second operating mode can be achieved by providing a first control mode and a second control mode.

[0005] Preferably, in the first operating mode, in order to generate rotation, the control and adjustment unit manipulates the drive unit such that the magnetic field of the stator leads the magnetic field of the rotor by 90° in a predetermined rotational direction, and adjusts the amplitude of the magnetic field of the rotor according to the rate of change of the current angular position, so that the drive unit rotates at a predetermined rotational speed.

[0006] Therefore, a suitable first control mode can be provided in a simple way.

[0007] Preferably, in the second control mode, after determining the current angular position of the spindle, a query is performed to determine whether the current angular position corresponds to a pre-given angular position.

[0008] Therefore, it is possible to easily and simply check the current corner position.

[0009] Preferably, if the current angular position does not correspond to the predetermined angular position, the control and adjustment unit manipulates the drive unit to adjust the predetermined angular position of the spindle.

[0010] Therefore, it is possible to easily and reliably adjust the pre-given angular position.

[0011] Preferably, in the second operating mode, the control and adjustment unit generates an electromagnetic holding torque to keep the spindle stationary at a predetermined angular position.

[0012] Therefore, a suitable second control mode can be provided in a simple way.

[0013] Preferably, the electromagnetic holding torque is generated by the magnetic field associated with the stator.

[0014] Therefore, electromagnetic holding torque can be generated easily and without complexity.

[0015] Preferably, in the second operating mode, the control and adjustment unit manipulates the drive unit in such a way that complex motion patterns of the spindle and / or oscillating motion within a predetermined angle range are achieved.

[0016] Therefore, the application-specific motion of the spindle can be achieved simply and reliably in the second control mode.

[0017] Furthermore, the present invention relates to a rotating laser having a housing, the rotating laser being operable in at least one first operating mode or a second operating mode, wherein a drive unit for rotating a laser beam is arranged within the housing, the drive unit having a stator and a rotor for rotating a drive shaft, and wherein the drive unit is equipped with a control and adjustment unit for manipulating the drive unit. In the first operating mode, the control and adjustment unit operates the drive unit in a first control mode corresponding to the first operating mode, the first control mode being equipped with brushless DC motor logic, and in the second operating mode, the control and adjustment unit operates the drive unit in a second control mode corresponding to the second operating mode, the second control mode being equipped with stepper motor logic.

[0018] Therefore, the present invention can provide a rotating laser in which operation in either a first or second operating mode can be achieved by providing a first control mode and a second control mode.

[0019] Preferably, the drive unit can be driven by multiple drive voltages, which are assigned to the selected operating mode and can be determined based on the current angular position of the spindle.

[0020] Therefore, it is possible to easily and uncomplicatedly operate a rotating laser in the selected operating mode.

[0021] Preferably, the rotor generates a first magnetic field and the stator generates a second magnetic field, wherein the orientation of the first and second magnetic fields is achieved by driving the drive unit with multiple drive voltages corresponding to the corresponding operating modes.

[0022] Therefore, it is possible to provide the first and second operating modes or control modes in a simple manner.

[0023] Preferably, the rotor has a toothed disk that can rotate with the main shaft, the toothed disk having an internal storage portion, wherein a magnet disk for generating a first magnetic field is arranged in the internal storage portion.

[0024] Therefore, the first magnetic field can be generated simply and reliably.

[0025] Preferably, the stator has a torsion-resistant circuit board with at least two coils facing the magnet disk for generating a second magnetic field.

[0026] Therefore, a second magnetic field can be generated easily and safely.

[0027] Preferably, the circuit board is equipped with an angle sensor for detecting the current angular position of the spindle.

[0028] Therefore, the current angular position of the spindle can be determined in a simple way.

[0029] Preferably, the angle sensor is constructed as a grating.

[0030] Therefore, a suitable angle sensor can be provided simply and without complexity. Attached Figure Description

[0031] The invention is described in more detail below with reference to embodiments shown in the accompanying drawings. The drawings show: Figure 1 A perspective view of a rotating laser with a driving unit according to the present invention. Figure 2 : Figure 1 A three-dimensional view of the drive unit of a rotating laser, including the spindle and the acquisition unit. Figure 3 Assigned to Figure 1 and Figure 2 A top view of the circuit board of the drive unit. Figure 4 :have Figure 1 and Figure 2 The three-dimensional view of the principal axis of the unit being obtained, and Figure 5 : Used for running Figure 1 and Figure 2 The flowchart shows the method for driving the unit.

[0032] In the accompanying drawings, elements with the same or similar functions are given the same reference numerals and are described in detail only once. Detailed Implementation

[0033] Figure 1 An exemplary rotating laser 100 is shown, having a housing 110 in which a laser unit 130 with a laser diode 135 is arranged for generating a laser beam. In the context of this invention, "rotating laser" can also be understood as a building laser or a leveling laser. Furthermore, a drive unit 120 for rotatably driving a spindle 125 is exemplary arranged in the housing 110.

[0034] The laser unit 130 is arranged on the main shaft 125 in the diagram such that, by rotating the main shaft 125, the laser beam generated by the laser unit 130 rotates within an associated plane. For this purpose, the main shaft 125 is preferably equipped with a rotating head 160 having a beam deflector 165. The beam deflector 165 is preferably configured to deflect the laser beam, thereby projecting the laser beam out of the associated plane. Depending on the type of rotating laser 100, the projected plane extends horizontally, vertically, or, for example, at a defined angle to the Earth's surface. Preferably, the drive unit 120 is configured as an electric motor.

[0035] Furthermore, an electronic unit 190 with an adjustment and monitoring device 195 is preferably arranged in the housing 110. The adjustment and monitoring device 195 is preferably configured to adjust the laser power of the laser unit 130 according to the operating mode. Here, the rotational speed of the spindle 125 of the drive unit 120 is controlled or adjusted. For this purpose, the spindle 125 is preferably equipped with a calculation unit 170.

[0036] According to one embodiment, the housing 110 is equipped with a cage-like member 112 associated with the rotating head 160 to prevent the rotating head 160 from being impacted.

[0037] The electronic unit 190 is preferably equipped with an operation unit 150, which has a display 151 and an input unit 152. The operation unit 150 is preferably connected to the electronic unit 190, and particularly to the adjustment and monitoring device 195, in terms of control or adjustment technology. The input unit 152 preferably includes at least one keypad area. Alternatively, the input unit 152 may have a knob, a touchscreen, a slider, a remote control, etc. Through the input unit 152, the user can, for example, input the rotational speed of the spindle 125. Alternatively, in one operating mode, the rotational speed of the laser unit 130 can be automatically adjusted.

[0038] Preferably, the rotating laser 100 has a leveling unit 180. The leveling unit 180 preferably has at least one tilt sensor 184 configured to determine the tilt of the rotating head 160, particularly the beam deflector 165, and / or the laser unit 130, relative to a predetermined direction, preferably a horizontal or vertical line. Furthermore, the leveling unit 180 preferably has at least one tilt adjustment motor 182 configured to orient the rotating head 160, particularly the beam deflector 165, and / or the laser unit 130, according to the orientation determined by the at least one tilt sensor 184, preferably the tilt of the laser unit 130 and / or the rotating head 160 relative to a vertical line.

[0039] Figure 2 Show Figure 1 The rotating laser 100 includes a drive unit 120 with a spindle 125 and an acquisition unit 170. The drive unit 120 preferably has a stator 210 and a rotor 220 for rotatably driving the spindle 125. Preferably, the drive unit 120 is configured as a spindle motor. Here, the drive unit 120 is preferably configured as a brushless DC motor. The rotor 220 is exemplarily equipped with a magnet disk 280, while the stator 210 is equipped with at least two coils 251. By energizing the coils 251, the spindle 125 can be preferably placed in a rotating state in one operating mode.

[0040] Preferably, the spindle 125 is equipped with a seeking unit 170. The seeking unit 170 exemplarily has a gear 230 and a grating 260. The gear 230 preferably forms a functional unit with the grating 260, in which the gear 230 generates a pulse sequence in the grating 260 that determines the seeking angular position.

[0041] The gear disk 230 is preferably connected to the main shaft 125 in a torsion-resistant manner. According to one embodiment, the gear disk 230 is integrally constructed with the main shaft 125. The gear disk 230, as shown in the figure, has a base 231. The base 231 is preferably constructed as a bowl shape with a receiving portion 233. The receiving portion 233 is preferably constructed to at least partially accommodate the magnet disk 280. Preferably, the gear disk 230 has teeth 232 arranged in a circumferential direction 201. Here, the teeth 232, as shown in the figure, are constructed on the outer periphery of the gear disk 230 along the longitudinal extension direction 202 of the main shaft 125.

[0042] The grating 260 is preferably configured to determine the relative change of the current angular position of the spindle 125 in the circumferential direction 201. The grating 260 is preferably constructed as a quadrature encoder. This quadrature encoder preferably has two gratings, which are preferably arranged offset from each other in the circumferential direction 201. The two gratings 260 are preferably equipped with a common light source. Furthermore, the two gratings 260 are preferably equipped with two preferably separate photodiodes or phototransistors.

[0043] The grating 260, as shown in the diagram, has a bottom surface and a preferably U-shaped receiving portion 262. The U-shaped receiving portion 262 preferably at least partially accommodates the teeth 232 of the toothed disk 230. The bottom surface of the grating 260, as shown in the diagram, is arranged on the lower side 241 of the circuit board 240 facing the toothed disk 230.

[0044] Circuit board 240 is preferably arranged in Figure 1 The rotating laser 100 is housed in a housing 110. Here, the circuit board 240 is preferably arranged parallel to the gear 230. Exemplarily, the circuit board 240 has an inner slot 246 for coaxial arrangement on the spindle 125. The circuit board 240, as shown in the diagram, has an upper side 242 and a lower side 241, the upper side exemplarily facing... Figure 1 A beam deflector 165 is arranged, with the lower side exemplarily facing the gear disk 230. Preferably, the circuit board 240 has at least two coils 251. The coils 251 are arranged on the lower side 241 of the circuit board 240 facing the gear disk 230, as shown in the figure. Preferably, the coils 251 are arranged on the circuit board 240 by means of a coil holding device 250. Preferably, the coil holding device 250 is fixed to the circuit board 240.

[0045] The magnet disk 280 preferably has a base 281 that is at least partially annular. Alternatively, the magnet disk 280 may have at least two magnet elements. Preferably, the magnet disk 280 is constructed as a permanent magnet having N pole pairs.

[0046] Preferably, the determining unit 170 has a reference mark as an absolute reference. The reference mark is preferably associated with the gear disk 230. The reference mark can be configured, for example, as a reference tooth or a reference slot. Here, the teeth 232 of the gear disk 230 have a first width, and the reference tooth or reference slot has a second width. The second width is preferably greater than the first width.

[0047] Alternatively, a reference mark is constructed as a positioning mark on the magnet disk 280 and is operatively connected to an absolute encoder. Here, it is not necessary to... Figure 1 The beam deflector 165, magnet disk 280, and toothed disk 230 are mechanically oriented relative to each other. Absolute positioning is preferably achieved by means of an additional component, such as a reflective light sensor, exemplarily in the form of an absolute encoder on circuit board 240 and a positioning mark on magnet disk 280. The positioning mark is preferably a reflective or light-absorbing sticker.

[0048] The positioning mark is preferably configured to identify one of the pole pairs of the magnet disk 280. If the magnet disk 280 comprises N pole pairs, the positioning mark must allow for the identification of an angular range with a width less than 360° / N. Preferably, the positioning mark has a width of 180° / N in the circumferential direction 201 of the spindle 125. Within each identified pole pair, the precise position is determined by the (electrical) angle of the magnetic field generated by the coil 251. This angle determination is preferably achieved during manufacturing by positioning the spindle 125 at any angle within the positioning mark using the magnetic field of the coil.

[0049] The rotating laser 100 is capable of operating in at least one first operating mode and / or a second operating mode, wherein preferably only one of the operating modes is activated. In the first operating mode, the control and adjustment unit 195 preferably operates the drive unit 120 in a first control mode associated with the first operating mode, the first control mode being equipped with brushless DC motor logic (…). Figure 5 (521 in the middle). In the second operating mode, the control and adjustment unit 195 preferably operates the drive unit 120 in a second operating mode corresponding to the second operating mode, which is equipped with stepper motor logic ( Figure 5 (531 in the middle).

[0050] The drive unit 120 is preferably capable of operating at multiple drive voltages ( Figure 5 The multiple driving voltages (523, 534) are used for driving, and these driving voltages are associated with the selected operating mode. Figure 5523, 534) can be determined based on the current angular position of the main spindle 125 ( Figure 5 Find 522 and 532 in the given information.

[0051] Preferably, the rotor 220 generates a first magnetic field, and the stator 210 generates a second magnetic field. The orientation of the first and second magnetic fields is preferably determined by multiple drive voltages corresponding to the respective operating modes. Figure 5 The drive unit 120 is driven by 523, 534 (as described above). Here, as described above, the rotor 220 has a gear disk 230 that can rotate with the main shaft 125, wherein a magnet disk 280 for generating a first magnetic field is arranged in the internal housing 233 of the gear disk 230. In addition, the stator 210 has a torsion-resistant circuit board 240, which has at least two coils 251 facing the magnet disk 280 for generating a second magnetic field.

[0052] Figure 3 Shown from the bottom 241 Figure 2 The circuit board 240. As described above, preferably, two coils 251 are arranged on the lower side 241 of the circuit board 240 by means of a coil holding device 250. Furthermore, a grating 260 is preferably arranged on the lower side 241 of the circuit board 240. In the diagram, the two coils 251 are arranged offset from each other by 90°. Preferably, the grating 260 is arranged opposite to one of the two coils 251, i.e., offset from each other by 180°.

[0053] Figure 4 It shows a toothed disk 230, a magnet disk 280, and Figure 2 The rotor 220 of the circuit board 240 is shown in a transparent manner for clearer and more intuitive illustration. The toothed disk 230 has teeth 232 arranged in a circumferential direction 201.

[0054] Figure 5 Showing the operation Figure 1 Rotating laser 100 or Figure 1 and Figure 2 An exemplary method 500 for the driving unit 120. In method 500, a query 510 is first performed to determine whether a first operating mode or a second operating mode is activated. This activation of the operating mode is preferably performed by the user of the rotating laser 100 using... Figure 1 The rotating laser 100 is implemented by an operation unit 150 having an input unit 152.

[0055] In response to the selection of the first operating mode, through Figure 1 The control and adjustment unit 195 controls the first operating mode corresponding to the first operating mode. Figure 1 and Figure 2The drive unit 120, in this first operating mode, is equipped with brushless DC motor logic 521. Here, Figure 1 and Figure 2 The structure is such that the drive unit 120 of the brushless DC motor is rotated. The preferred first operating mode is... Figure 1 The rotation mode of the rotating laser 100. Preferably, Figure 1 and Figure 2 The drive unit 120 is energized here by sinusoidal commutation, in which... Figure 2 and Figure 3 Coil 251 according to Figure 2 and Figure 3 coil 251 and Figure 2 and Figure 4 The sine of the relative angle between the magnetic fields of rotor 220 is manipulated. Preferably, Figure 1 and Figure 2 The drive unit 120 is driven at a constant speed.

[0056] In response to the selection of the second operating mode, through Figure 1 The control and adjustment unit 195 controls the second operating mode corresponding to the second operating mode. Figure 1 and Figure 2 The drive unit 120, in this second operating mode, is equipped with stepper motor logic 531. Preferably, the second operating mode is a point mode, in which... Figure 1 , Figure 2 and Figure 4 The spindle 125 is arranged at a predetermined angular position or within a predetermined angular range. Subsequently, Figure 1 and Figure 2 The drive unit 120 is driven in the selected operating mode, wherein, Figure 1 and Figure 2 The drive unit 120 is driven by multiple drive voltages 523 and 534, which are assigned to the selected operating mode and according to... Figure 1 , Figure 2 and Figure 4 The current angular positions 522 and 532 of the main axis 125 are used to determine the position.

[0057] Therefore, in the first operating mode or first control mode, the brushless DC motor logic 521 is activated, and then the following is calculated: Figure 1 , Figure 2 and Figure 4 The current angular position 522 of the spindle 125 is determined, and the drive voltage 523 is calculated and adjusted based on the current angular position 522.

[0058] Preferably, in order to generate Figure 1 and Figure 2 The drive unit 120 or Figure 1 , Figure 2 and Figure 4 The spindle rotates at 125 degrees, controlled in the first operating mode. Figure 1 The control and adjustment unit 195 enables Figure 2 The magnetic field of stator 210 leads the rotation in a predetermined direction. Figure 2 and Figure 4 The magnetic field of rotor 220 is 90°. Furthermore, it is adjusted according to the rate of change of the current angular position 522. Figure 2 and Figure 4 The amplitude of the magnetic field of rotor 220 makes Figure 1 and Figure 2 The drive unit 120 or Figure 1 , Figure 2 and Figure 4 The spindle 125 rotates at a predetermined rotational speed.

[0059] In the second operating mode or second control mode, the stepper motor logic 531 is activated, and then the following is calculated: Figure 1 , Figure 2 and Figure 4 The current angular position 532 of the spindle 125 is determined. Then, a query 533 is performed: whether the current angular position 532 matches a pre-defined angular position. If the current angular position 532 does not match a pre-defined angular position, the selected or pre-defined angular position is adjusted. Subsequently, the drive voltage 534 is calculated and adjusted based on the angular position 532, and an electromagnetic holding torque 535 is generated. The electromagnetic holding torque 535 at least limits... Figure 1 , Figure 2 and Figure 4 The movement of the main shaft 125. Alternatively, the electromagnetic holding torque 535 causes... Figure 1 , Figure 2 and Figure 4 The main shaft 125 is stationary in a predetermined angular position.

[0060] In the second control mode, in finding Figure 1 , Figure 2 and Figure 4 After determining the current angular position 532 of the spindle 125, a query 533 is performed: whether the current angular position 532 corresponds to a pre-given angular position. Preferably, if the current angular position 532 does not correspond to a pre-given angular position, then... Figure 1 The control and adjustment unit 195 rotates to operate Figure 1 and Figure 2 The drive unit 120 is used for adjusting Figure 1 , Figure 2 and Figure 4 The pre-defined angular position of the spindle 125. Furthermore, in the second operating mode, Figure 1The control and adjustment unit 195 generates an electromagnetic holding torque 535, used to make... Figure 1 , Figure 2 and Figure 4 The main shaft 125 is stationary in a predetermined angular position. Preferably, it is equipped with... Figure 2 The magnetic field of stator 210 generates an electromagnetic holding torque of 535.

[0061] The electromagnetic holding torque should preferably counteract other force effects, such as gravity (especially in vertical operation where spindle assembly imbalance may exist) or magnetic / ferromagnetic cogging torque (for...). Figure 2 and Figure 4 The magnet disk 280 of the rotor 220 has an influence.

[0062] Preferably, in the second operating mode, the control and adjustment unit 195 operates in the following manner. Figure 1 and Figure 2 The drive unit 120 or Figure 1 , Figure 2 and Figure 4 The 125mm spindle also enables... Figure 1 , Figure 2 and Figure 4 The main shaft 125 exhibits complex motion patterns and / or oscillating motions within a pre-defined angular range. The complex motion patterns can be arbitrary motion processes. In such oscillating motions within a pre-defined angular range, the motion can preferably be adjusted for… Figure 1 , Figure 2 and Figure 4 The frequency of the reciprocating motion of the main shaft 125.

[0063] Preferably, each Figure 2 and Figure 3 The coil 251 is provided with driving voltages 523 and 534. The ratio and amplitude of driving voltages 523 and 534 relative to each other determine the winding configuration. Figure 2 The direction and intensity of the second magnetic field of the stator 210. The difference between the first and second operating modes is basically in the configuration of the magnetic field. Figure 2 The direction of the second magnetic field of stator 210 relative to the one belonging to Figure 2 and Figure 4 The direction of the first magnetic field of rotor 220, or in other words Figure 1 , Figure 2 and Figure 4 The relationship between the angular position of the main axis 125.

Claims

1. A method (500) for operating a rotating laser (100), the rotating laser being capable of operating in at least a first operating mode or a second operating mode and having a housing (110) in which a drive unit (120) is arranged for rotating a laser beam, the drive unit having a stator (210) and a rotor (220) for rotatably driving a main shaft (125), wherein, The drive unit (120) is equipped with a control and adjustment unit (195) for operating the drive unit (120), wherein the method includes the following steps: - In response to the selection of the first operating mode, the drive unit (120) is controlled by the control and regulation unit (195) in a first operating mode corresponding to the first operating mode, the first operating mode being equipped with brushless DC motor logic (521). - In response to the selection of the second operating mode, the drive unit (120) is operated by the control and adjustment unit (195) in a second operating mode corresponding to the second operating mode, the second operating mode being equipped with stepper motor logic (531), and - Drive the drive unit (120) in the first control mode or drive the drive unit (120) in the second control mode, wherein the drive unit (120) can be driven by a plurality of drive voltages (523, 534), the drive voltages being assigned to the selected operating mode and determined based on the current angular position (522, 532) of the spindle (125).

2. The method according to claim 1, characterized in that, In the first operating mode, in order to generate rotation, the control and adjustment unit (195) manipulates the drive unit (120) such that the magnetic field of the stator (210) leads the magnetic field of the rotor (220) by 90° in a predetermined rotational direction, and adjusts the amplitude of the magnetic field of the rotor (220) according to the rate of change of the current angular position (532) so that the drive unit (120) rotates at a predetermined rotational speed.

3. The method according to claim 1 or 2, characterized in that, In the second control mode, after obtaining the current angular position (532) of the spindle (125), a query (533) is performed to determine whether the current angular position (532) corresponds to a pre-given angular position.

4. The method according to claim 3, characterized in that, If the current angular position (532) does not correspond to the predetermined angular position, the control and adjustment unit (195) manipulates the drive unit (120) to adjust the predetermined angular position of the spindle (125).

5. The method according to claim 3 or 4, characterized in that, In the second operating mode, the control and adjustment unit (195) generates an electromagnetic holding torque (535) to keep the spindle (125) stationary in the predetermined angular position.

6. The method according to claim 5, characterized in that, The magnetic field associated with the stator (210) generates the electromagnetic holding torque (535).

7. The method according to any one of the preceding claims, characterized in that, In the second control mode, the control and adjustment unit (195) controls the drive unit (120) to achieve complex motion patterns of the spindle (125) and / or swing motion within a pre-given angle range.

8. A rotating laser (100) having a housing (110), said rotating laser being capable of operating in at least one first operating mode or a second operating mode, wherein, A drive unit (120) for rotating a laser beam is arranged in the housing (110). The drive unit has a stator (210) and a rotor (220) for rotatably driving a spindle (125). The drive unit (120) is equipped with a control and adjustment unit (195) for operating the drive unit (120). The drive unit (120) is characterized in that, in a first operating mode, the control and adjustment unit (195) operates the drive unit (120) in a first control mode corresponding to the first operating mode, the first control mode being equipped with brushless DC motor logic (521). In a second operating mode, the control and adjustment unit (195) operates the drive unit (120) in a second control mode corresponding to the second operating mode, the second control mode being equipped with stepper motor logic (531).

9. The rotating laser according to claim 8, characterized in that, The drive unit (120) can be driven by a plurality of drive voltages (523, 534), which are assigned to the selected operating mode and can be determined based on the current angular position (522, 532) of the spindle (125).

10. The rotating laser according to claim 8 or 9, characterized in that, The rotor (220) generates a first magnetic field, and the stator (210) generates a second magnetic field, wherein the orientation of the first magnetic field and the second magnetic field is achieved by driving the drive unit (120) with multiple drive voltages (523, 534) corresponding to the corresponding operating modes.

11. The rotating laser according to claim 10, characterized in that, The rotor (220) has a toothed disk (230) that can rotate together with the main shaft (125), the toothed disk having a content compartment (233), wherein a magnet disk (280) for generating the first magnetic field is arranged in the content compartment (233).

12. The rotating laser according to claim 10 or 11, characterized in that, The stator (210) has a torsion-resistant circuit board (240) with at least two coils (251) facing the magnet disk (280) for generating the second magnetic field.

13. The rotating laser according to claim 12, characterized in that, The circuit board (240) is equipped with an angle sensor (260) for detecting the current angular position of the spindle (125).

14. The rotating laser according to claim 13, characterized in that, The angle sensor (260) is constructed as a grating.

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