TWI729063B - Marking device for specifying a position mark on a placing surface of a workpiece, sewing apparatus with the marking device and method for calibrating the marking device - Google Patents

Abstract

The invention relates to a marking device for marking a prescribed position on a placement surface of a workpiece, comprising: a driving device for swinging a marking light-emitting element; a marking light-emitting element for generating light marks; and a transmission device for driving The rotating movement of the device is converted into the swinging movement of the marking light-emitting part, and the driving device is operatively connected to the marking light-emitting part through the transmission device in the following manner, so that the movement of the position mark on the placement surface caused by the deviation is less than 10%. The rotational angle of the rotational movement of the drive device is linearly related.

Description

Marking device for marking a predetermined position on the placement surface of a workpiece, sewing equipment with the marking device, and method for calibrating the marking device

Field of invention

The invention relates to a marking device, a sewing device with the marking device and a method for calibrating the marking device.

Background of the invention

The marking device consists of DE 10 2007 019 944 A1, DE 10 2007 019 945 A1, DE 10 2007 020 161 A1, DE 10 2007 041 085 A1, JP 2008 188 148 A, JP 2002 336 568 A, JP 09 024 172 A, US 3,766,870 and US 2013/0139739 A1 are known.

Summary of the invention

The object of the present invention is to provide a marking device which aims to improve and simplify the regulation of the marking position on the placement surface of the workpiece.

The purpose is achieved by the marking device as described in claim 1 achieve.

According to the invention, the transmission device is provided for converting the rotational movement of the drive device into the swing movement of the marking light. The driving device is operatively connected to the marking light-emitting element through the transmission device in the following manner, so that the movement of the marking caused by deviation is less than 10%, especially less than 8%, especially less than 4%, especially less than 1%. The angle of rotation of the rotary motion is linearly related. In particular, this arrangement can make the two angular function components of the movement of the position marker caused almost completely cancel out, thereby preserving the linear component. In this way, a linear relationship between the resulting movement of the position mark or light mark and the rotational movement of the drive device is achieved in a good approximation. The same is true for swing angles that do not satisfy the small-angle approximation (where the sine or tangent of the angle can no longer be replaced by the angle itself in radians). The resulting movement of the position mark on the placement surface, that is, the distance traveled by the position mark when the drive device pivots, has a linear correlation with the rotational angle of the drive device with a deviation of less than 10%, especially when the rotation angle is greater than 10° and at The swing angle of the marking light-emitting element is greater than 10°, especially greater than 15°, greater than 20°, greater than 25°, or greater than 30°. Due to the linear relationship between the movement of the light mark caused and the rotational movement of the drive device, a given position resolution of the rotational movement of the drive device can be used to achieve favorable high position resolution when specifying the orientation of the position mark. When the light mark hits the placement surface obliquely, the transmission device switches such that a given rotation angle of the drive device causes only a small angular change of the incident angle of the light mark on the placement surface. On the contrary, when the light mark is incident on the placement surface steeply and especially vertically, the same rotational movement of the driving device causes the swing angle of the marking light-emitting element to change. Big change. Due to the small linear deviation, it is possible to omit the correction of the position mark or the optical mark by the user. In particular, there is no need to manipulate the displacement button to correct the offset between the theoretical position and the actual position of the position mark or light mark. No calibration procedure is required.

Advantageously, the drive device is designed as a synchronous motor, in particular a stepper motor, for example a semi-stepper motor.

Advantageously, the marking light is designed as a laser.

Preferably, the marking device is used in sewing equipment, where the workpiece is a sewing material.

In the marking device as described in claim 2, a transmission device with a simple structure is provided. Exactly one coupling element is provided, which couples the rotational movement of the drive device with the pivoting movement of the marking light. Advantageously, the coupling element is designed as a hinged mobile arm. In an advantageous embodiment, the mobile arm is configured to be telescopic. Alternatively or in addition, the support for the marking light element (where the coupling element can be hinged on the marking light element) is formed telescopically. This telescopic implementation avoids the kinematic coordination of the transmission device.

In the marking device according to claim 3, an advantageous embodiment of the structure of the marking light-emitting element is provided. The kinematic coordination of the transmission is avoided by the guide area. Advantageously, the section or part of the transmission is guided linearly in the guide area of the marking light.

The marking device as described in claim 4 provides a structurally advantageous connection between the driving device and the marking light-emitting element. Advantageously, the coupling element is fixedly connected to the drive shaft of the drive unit with its one end and is advantageous With its opposite ends, it is supported movably, in particular linearly movably, in the guide area of the marking light. Advantageously, the end of the coupling element in the guide area of the marking light element performs a linear movement.

The marking device as described in claim 5 provides a coupling element with an advantageous structure. Advantageously, the protruding guide part is rotatably supported on the coupling element and slidably supported in the guide area of the marking light.

In the marking device as described in claim 6, it is ensured that the position marking is specified particularly accurately on the placement surface.

In the marking device as described in claim 7, it is provided that it is particularly advantageous to input at least one auxiliary position and/or the position to be marked. Advantageously, the input module has a touch control system. This ensures a particularly advantageous input.

Advantageously, the input module has a display device in the form of a display, in particular a touch-sensitive display. Thereby, multiple control and selection function tables can be selected for selecting at least one control command.

In the marking device according to claim 8, a particularly preferred embodiment of the marking device is provided. In particular, the distance between the swing axis and the drive shaft axis is constant during the swing movement of the marking light. The holding unit of the marking light can be designed as a lever arm of the transmission device of the marking device. The coupling element can be designed as another lever arm of the transmission.

Preferably, the drive shaft axis is driven by a drive device, in particular a rotary drive device, in particular a stepper motor.

In the marking device as described in claim 9, further improvement A particularly preferred embodiment of the marking device. In the transient position in which the swing axis, the drive shaft axis, and the coupling axis are flush with each other in the vertical direction, the distance between the drive shaft axis and the coupling axis is approximately between the coupling axis and the swing axis Half of the distance, especially max. 50%, max. 45% or max. 40%.

Another object of the present invention is to provide a sewing equipment with a marking device.

The stated purpose is achieved by the features of claim 10.

According to the present invention, it has been recognized that it is possible to improve the provision of position markings for sewing materials.

Advantageously, the marking device is arranged in the sewing device in such a way that the position marking can be specified on the placement surface and does not prevent the sewing material from being seen.

Another object of the present invention is to provide a method for calibrating a marking device.

The objective is achieved by the method described in Claim 11.

According to the invention, it has been recognized that by calibrating the marking device, the position specification of the position marking on the placement surface of the workpiece can be improved. Therefore, the residual deviation of the linear relationship between the rotational movement amount of the driving device and the position movement of the position mark on the placement surface caused can be corrected. No other measures need to be applied by the user for correcting the position mark. In particular, it is not necessary to determine the displacement amount and manipulate the drive device in relation to the displacement amount.

In the method as described in claim 12, a particularly advantageous arrangement of auxiliary positions is provided. In order to further improve the position specification of the position mark on the placement surface of the workpiece, three or more, especially five or more, especially ten or more auxiliary positions can be provided.

1: marking device

2: fixed pin

3: drive device

4: Mark light-emitting parts

5: Transmission

6: Fixed base

7: Drive shaft

8: mobile arm

9: Holding unit

10: Radiation unit

11, 15: rotating hinge

12: Acceptance area

13: Boot area

13a: guide rail

14: guide parts

16: position mark

17: Place the surface

18: position sensor

19: Reference switch

20: Input module

21: display device

22: Select menu

23: Control and adjustment unit

24, 26, 27: auxiliary position

25: storage unit

Hereinafter, embodiments of the present invention will be explained in detail with reference to FIGS. 1 to 7. It shows: FIG. 1 shows a front view of the marking device, FIG. 2 shows a side view of the marking device according to FIG. 1, and FIG. 3 shows a schematic diagram of an input module of the marking device according to FIG. 4 shows the transient position of the marking device at the first auxiliary position in a view similar to FIG. 1, and FIG. 5 shows the transient position of the marking device at the second auxiliary position in a similar view of FIG. 1, Fig. 6 shows the transient state of the marking device at the third auxiliary position in a similar view of Fig. 1, and Fig. 7 shows the marking device between the first and third auxiliary positions in a similar view of Fig. 1 The transient position at the position marker.

Detailed description of the preferred embodiment

An embodiment of the marking device will be explained in detail below with reference to FIGS. 1 and 2. The marking device 1 is fixed in a device not shown, in particular a sewing device, by means of a fixing pin 2 shown schematically. The marking device 1 includes a driving device 3, a marking light-emitting element 4 and a transmission device 5. The driving device 3 can be detachably connected to the fixed base 6. Advantageously, the releasable connection is designed as a threaded connection. The drive device 3 has a protruding drive shaft 7. The drive shaft 7 is connected to a transmission device 5, wherein in the illustrated embodiment, the transmission device 5 is designed as a coupling element in the form of a moving arm 8. The driving device 3 is connected with the marking light-emitting element 4 by moving the arm 8.

The marking light-emitting element 4 includes a holding unit 9 and a radiation unit 10. The holding unit 9 is fixed on the fixed base 6 by a rotating hinge 11. A rotation axis (hereinafter referred to as a swing axis) extends through the rotation hinge 11, and the marking light-emitting member 4 can rotate around the rotation axis. The radiation unit 10 is advantageously designed as a laser. The radiation unit 10 is arranged in the receiving area 12 of the holding unit 9. Depending on the application of the marking device 1, the radiation unit 10 can be fixed in the receiving area 12 in a releasable or non-releasable manner.

A guide area 13 is provided adjacent to the receiving area 12. The end of the moving arm 8 is supported linearly movably in the guide area 13. A protruding guide member 14 is provided for this. The protruding guide member 14 is rotatably supported on the end of the moving arm 8 and is slidably supported in the guide area 13. To this end, the guide area 13 includes a guide rail 13 a, which is fixedly screwed to the base body of the holding unit 9. A guide area 13 is formed between the rail 13 a and the opposed mating surfaces of the base body of the holding unit 9 in the form of a linear guide structure with one side open for protruding the guide member 14.

In the illustrated embodiment, the end of the moving arm 8 is fixedly connected to the drive shaft 7, so that a rotating hinge 15 is provided on this end. Another axis of rotation (hereinafter referred to as the axis of the drive shaft) extends through the rotating hinge 15, and the moving arm 8 can rotate about the axis of rotation. The rotation axes of the two rotation hinges 11, 15 are spaced apart from each other. The swing axis is flush in the vertical direction The ground is arranged above the axis of the drive shaft. The opposite ends of the moving arm 8 are supported in the guide area 13 so as to be linearly movable by the protruding guide member 14. The coupling axis extends through the protruding guide part 14. The swing shaft is articulated with the holding unit 9 above the coupling axis. During the swing movement of the marking light 4, the distance between the swing axis and the drive shaft axis remains constant. The distance between the coupling axis and the swing axis and the drive shaft axis changes. In principle, it is satisfied that the distance between the drive shaft axis and the coupling axis is smaller than the distance between the coupling axis and the pivot axis. In the transient position in which the swing axis, the coupling axis and the drive shaft axis are flush with each other in the vertical direction, it is satisfied that the distance between the drive shaft axis and the coupling axis is approximately between the coupling axis and the swing axis Half of the distance (see Fig. 6) is particularly satisfied: the distance between the drive shaft axis and the coupling axis is at most 50%, 45% or 40% of the distance between the coupling axis and the swing axis.

Thus, the drive device 3 is operatively connected to the marking light-emitting element 4 via the moving arm 8 in the following way: the movement of the position marking 16 on the placement surface 17 has a deviation of less than 10%, especially less than 5%, especially less than 1%. The rotational movement of the drive device is linearly related. The position of the position marker 16 can be freely selected in the display area.

In addition, a position sensor 18 is provided, which is fixed on the fixed base 6 adjacent to the receiving area 12 (see FIG. 2). The position sensor 18 is used to detect the position mark 16 or mark the position data of the light-emitting element 4. The position sensor can be designed as an incremental encoder known from the prior art. In order to determine the reference position, a reference switch 19 is provided. The reference switch 19 can cooperate with the position sensor 18. The reference switch 19 is related to the reference position to be specified It is arranged adjacent to the marking light-emitting element 4. Similar to the reference position on the machine tool, the marking device 1 refers to the reference position. In addition, the reference position may be outside the display area.

FIG. 3 shows the input module 20 of the marking device 1. The input module 20 has a display device 21 in the form of a display, in particular a touch-sensitive display, for displaying multiple control and selection function tables 22. The input module 20 is bidirectionally connected to selected components of the marking device 1, such as the driving device 3, the marking light-emitting element 4, the position sensor 18 and/or the reference switch 19. The signal connection can be configured in a cable connection or wireless manner according to the application of the marking device 1.

By manipulating and selecting the function table 22, the auxiliary position and/or the position data of the position to be marked can be input. The input data is processed by the control and adjustment unit 23 shown schematically. The switch-on signal is then transmitted to the drive device 3. The detected data of the position sensor 18 is transmitted to the control and adjustment unit 23 and compensated with the input theoretical position. If the theoretical position is reached, the disconnection signal is transmitted to the drive device 3.

A method for calibrating the marking device 1 will be described in detail below with reference to FIGS. 4 to 7.

Before the actual calibration, the reference position is approached after the marking device 1 is switched on. The reference position is used to check and control the marking device 1. This reference ensures that the auxiliary position or auxiliary point can be accurately described and approached. Then approach the auxiliary positions 24, 26, 27 as described below. The auxiliary positions 24, 26, 27 form the basis for linear interpolation of the intermediate area and are used to mark each arbitrary position to be shown of the light-emitting element 4 basis.

To calibrate the marking device 1, the first auxiliary position 24 is approached. The auxiliary position 24 can be specified by the input module 20. The position data of the first auxiliary position 24 is stored in the storage unit 25, and the storage unit is in signal connection with the control and adjustment unit 23. Then, the second auxiliary position 26 is selected through the manipulation and selection function table 22. Next, the driving device 3 changes the rotation angle of the driving shaft 7 in the following manner: the marking light-emitting element 4 is swung, so that the position marking 16 is displayed on the second auxiliary position 26. The position data is detected by the position sensor 18 and stored in the storage unit 25. Then, the third auxiliary position 27 is input through the manipulation and selection function table 22, so that the marking light-emitting element 4 manipulates the third auxiliary position 27 as described above and stores its position data in the storage unit 25. Finally, the sub-strokes are interpolated between the first auxiliary position 24 and the third auxiliary position 27 and between the second auxiliary position 26 and the third auxiliary position 27, respectively.

After the calibration is over, any value between the display area, that is, the first and second auxiliary positions 24, 26 can be approached.

In order to approach the auxiliary positions 24, 26, 27 or the position mark 16, a switch-on signal is sent to the drive device 3, so that the drive shaft 7 rotates by a predetermined angle of rotation φ. As a result, the moving arm 8 rotates around the rotating hinge 15 by the same angle of rotation φ. Therefore, the protruding guide member 14 rotates around its center axis and simultaneously moves linearly in the guide area 13. The protruding guide member 14 causes the marking light-emitting element 4 to swing around the rotating hinge 11 by an angle of rotation φ', which is nonlinearly related to the angle of rotation φ due to the action of the transmission device 5 and causes the position mark 16 to linearly and linearly on the placement surface 17 The corner φ translates relative to each other.

In other words, the transmission device 5 functions in the following way: the translation of the position mark 16 on the placement surface 17 is linearly related to the rotation angle φ of the drive shaft 7 in a good approximation. As a result, it is achieved that the change of the rotation angle φ over the entire display area causes an approximately constant translation of the position mark 16. Therefore, the translation caused by the position mark 16 when the rotation angle φ is changed from 39° to 40°, for example, is approximately the same as when the rotation angle φ is changed from 69° to 70°, for example.

1: marking device

2: fixed pin

3: drive device

4: Mark light-emitting parts

5: Transmission

6: Fixed base

7: Drive shaft

8: mobile arm

9: Holding unit

10: Radiation unit

11, 15: rotating hinge

12: Acceptance area

13: Boot area

14: guide parts

16: position mark

17: Place the surface

Claims (12)

A marking device for marking a prescribed position on a placement surface of a workpiece, comprising: a driving device for swinging a marking light-emitting element; a marking light-emitting element with a holding unit for generating light marks; and a transmission device for turning The rotational movement of the driving device is converted into the swinging movement of the marking light-emitting element, and the driving device is operatively connected to the marking light-emitting element through the transmission device in the following manner, so that the movement of the position mark on the placement surface caused by the deviation is less than 10% It is linearly related to the rotation angle of the rotational movement of the drive device. The marking device according to claim 1, wherein the transmission device has a coupling element. The marking device according to claim 1 or 2, wherein the marking light-emitting element has a guide area for guiding the translation of the section of the transmission device. The marking device according to claim 3, characterized in that the coupling element is connected to the drive device in a non-rotatable manner at one end of the coupling element, and is movably supported on the marking at the opposite end. In the guide area of the luminous element. The marking device according to claim 4, characterized in that a protruding guide member is arranged on the coupling element for guiding the end of the coupling element in the guide area of the marking light-emitting element. The marking device as described in claim 1 or 2 above, It is characterized in that it also includes a position sensor for detecting the position mark and/or marking the position data of the light-emitting element. The marking device according to claim 1 or 2 is characterized in that it further comprises an input module for inputting at least one auxiliary position and/or position mark. The marking device according to claim 2, characterized in that: a rotating hinge with a swing axis, through which the holding unit is hinged on a part of the marking device fixed on the frame; another rotating hinge with a drive shaft axis A hinge, through which the coupling element is hinged on a component fixed on the frame through the other rotating hinge, wherein the swing axis is arranged flush with the drive shaft axis in the vertical direction. The marking device according to claim 4, characterized in that the holding unit of the marking light-emitting element is hinged above the coupling axis of the protruding guide member at the coupling element, wherein it is satisfied that: between the drive shaft axis and the coupling axis The distance is smaller than the distance between the coupling axis and the swing axis. A sewing equipment having the marking device according to any one of claims 1 to 9. A method for calibrating the marking device according to any one of claims 1 to 9, which has the following method steps: approaching a first auxiliary position, storing position data of the first auxiliary position, and approaching a second auxiliary position , Store the position data of the second auxiliary position, approach the third auxiliary position, store the position data of the third auxiliary position, and the interpolation value between the first auxiliary position and the third auxiliary position and between the second auxiliary position and the third auxiliary position Sub-stroke between auxiliary positions. The method according to claim 11, wherein the first auxiliary position and the third auxiliary position are located on the outer edge of the display area of the marking light-emitting element, and the third auxiliary position is centered between the first auxiliary position and the third auxiliary position. between.

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