JP2017189788A - Laser marking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser marking device capable of improving the followability of scanning of a galvano-scanner to a transportation speed of work-pieces.SOLUTION: A laser marking device includes: a data generation unit 34 as coordinate conversion means for converting coordinate data into coordinate systems of galvano-scanners 14 and 15 configured so as to have a prescribed angle relative to a coordinate system of printing data when generating coordinate data on the basis of printing data; and an X-addition signal calculation unit 32 and a Y-addition signal calculation unit 33 for calculating correction values on the basis of the coordinate systems of the galvano-scanners 14 and 15 with respect to the transportation speed of work-pieces. A control unit 35 controls driving of the galvano-scanners 14 and 15 on the basis of the coordinate data converted by the data generation unit 34 and the correction values calculated by the X-addition signal calculation unit 32 and the Y-addition signal calculation unit 33.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laser marking device.

  2. Description of the Related Art Conventionally, there is known a laser marking device that scans a workpiece using a galvano scanner with laser light emitted from a laser light emitting unit and prints characters or the like (see, for example, Patent Document 1).

  In such a laser marking device, the workpiece is arranged in the middle of the conveying device that conveys the workpiece, and the workpiece conveyed by the conveying device may be irradiated with laser light. In such a case, the laser marking apparatus controls the galvano scanner in consideration of the conveyance speed of the workpiece to be conveyed.

JP 2009-82942 A

  By the way, in the laser marking apparatus as described above, a galvano scanner is used to scan a workpiece and print characters or the like. However, when the laser marking apparatus is positioned with respect to the transport apparatus, an X-axis galvano scanner is used. Alternatively, the scanning direction (movable direction) of the Y-axis galvano scanner coincides with the transport direction. For this reason, the X-axis or Y-axis galvano scanner that scans the laser beam in a movable direction that coincides with the conveyance direction is used to scan the laser beam with the conveyance speed taken into account.

Thus, in one galvano scanner, the workpiece must be scanned after following the conveyance speed, leaving room for improvement in terms of followability.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laser marking device capable of improving the follow-up performance of a galvano scanner to the transport speed of a work to be transported. It is in.

  A laser marking device that solves the above-described problems includes a laser beam emitting unit that emits a laser beam, and a first scanning unit that scans the laser beam emitted from the laser beam emitting unit while the respective scanning directions intersect with each other. A laser marking apparatus comprising: a second galvano scanner; and a laser beam emitting unit and a control unit that controls driving of the first and second galvano scanners, and generates coordinate data based on print data A coordinate conversion means for converting the coordinate data so as to be the coordinate system of the first and second galvano scanners set so as to have a predetermined angle with respect to the coordinate system of the print data; Calculating means for calculating respective correction values based on the coordinate systems of the first and second galvano scanners, and the control means Controlling the driving of the first and second galvano-scanner based on each correction value calculated by said coordinate data and said calculation means has been converted by the coordinate conversion means.

  According to this configuration, the coordinates of the print data are converted into the coordinate data so that the coordinate system of the first and second galvano scanners is set to have a predetermined angle with respect to the coordinate system of the print data. Even if the coordinate system of the system and the first and second galvano scanners are different, scanning can be performed appropriately. Here, for example, when the laser marking device is installed so that the coordinate axis constituting the coordinate system of the print data is along the transport direction, each galvano scanner has a predetermined angle with respect to the transport direction. The coordinate system is shifted with respect to the transport direction. For this reason, in order to cause the laser light to follow the transport speed of the work transported in the transport direction, the laser light is scanned by being assigned to each galvano scanner. Since the laser light is scanned in the conveyance direction in such a way as to be assigned to each galvano scanner in this way, the load on the galvano scanner can be reduced compared to the case where only one galvano scanner follows the conveyance speed as in the past. it can. As a result, since there is a margin in the scanning speed of each galvano scanner in the transport direction, it is possible to improve the scanning followability with respect to the transport speed as compared with the conventional case where only one galvano scanner follows the transport speed. .

  In the laser marking apparatus, the first and second galvano scanners may include one of two coordinate axes constituting the coordinate system of the first and second galvano scanners and a coordinate axis constituting the coordinate system of the print data. The first angle formed and the second angle formed by one of the two coordinate axes constituting the coordinate system of the first and second galvano scanners and the coordinate axis constituting the coordinate system of the print data are the same angle It is preferable to be configured as follows.

According to this configuration, since the first angle and the second angle are the same, the burden for following the workpiece conveyance speed can be the same for each galvano scanner.
In the laser marking apparatus, it is preferable that the first and second galvano scanners are configured such that the coordinate system forms 45 degrees with respect to the coordinate system of the print data.

  According to this configuration, since the coordinate system of each galvano scanner is 45 degrees with respect to the coordinate system of the print data, as described above, the load for following the workpiece conveyance speed is the same for each galvano scanner. be able to.

  The laser marking device includes a display unit capable of displaying a marking area within a scannable area where the laser beam can be scanned by the first and second galvano scanners, and the display unit includes the first marking area, It is preferable that the first marking area is configured to be switchable with the second marking area having a long shape in the direction along the coordinate axis constituting the coordinate system of the print data.

According to this structure, since it can switch in a display means with a 1st marking area and a 2nd marking area, the convenience can be improved.
In the laser marking device, guide light emitting means for emitting visible light for grasping a marking area within a scannable area where laser light can be scanned by the first and second galvano scanners, and the first and second Control means for controlling a two-galvano scanner and the guide light emitting means, the control means controlling the guide light emitting means and the first and second galvano scanners, and A first guide mode for scanning the light emitted from the guide light emitting means, and a second guide mode for scanning the light emitted from the guide light emitting means so as to be the second marking area. It is preferable to have.

  According to this structure, a 1st marking area and a 2nd marking area can be shown with a guide light on a workpiece | work or a conveying apparatus.

  According to the laser marking device of the present invention, it is possible to improve the follow-up performance of the galvano scanner scanning with respect to the transport speed of the work to be transported.

The schematic block diagram of the laser marking apparatus in one Embodiment. Explanatory drawing for demonstrating the scanning area of the laser marking apparatus in the embodiment. Explanatory drawing for demonstrating the relationship between the coordinate system of the galvano scanner of the laser marking apparatus in the same embodiment, and the coordinate system of print data. Explanatory drawing for demonstrating the display part of the laser marking apparatus in the embodiment. Explanatory drawing for demonstrating the relationship between the coordinate system of the galvano scanner of the laser marking apparatus as a reference example, and the coordinate system of print data. Explanatory drawing for demonstrating the example of a display of the display part in another example. (A) (b) Explanatory drawing for demonstrating the example of a display of the display part with respect to an input character.

Hereinafter, an embodiment of a laser marking device will be described with reference to the drawings.
As shown in FIG. 1, the laser marking device 10 of this embodiment is provided above the belt conveyor 50. The laser marking device 10 marks a predetermined print shape (character “ABC” in this embodiment) such as characters, symbols, and figures on the surface of the workpiece W conveyed by the belt conveyor 50 in the conveyance direction Td. Is. The predetermined print shape here corresponds to print data set by the user by input or the like.

  As shown in FIG. 1, the laser marking device 10 has a laser light source 11 as a laser beam emitting means for emitting a laser beam. The laser light source 11 is a laser oscillator, and as an example thereof, a YAG laser may be used.

A beam expander 12 is disposed downstream of the laser light source 11. The beam expander 12 expands the beam diameter of the laser light emitted from the laser light source 11.
A dichroic mirror 13 is disposed downstream of the beam expander 12. The dichroic mirror 13 is disposed on the optical path (on the optical axis) of the laser light so as to be inclined at a predetermined angle (45 ° in the present embodiment) with respect to the optical axis. The dichroic mirror 13 is configured to transmit laser light while reflecting guide light described later.

  At the subsequent stage of the dichroic mirror 13, an X-axis galvano scanner 14 as a first galvano scanner and a Y-axis galvano scanner 15 as a second galvano scanner are arranged.

  The X-axis galvano scanner 14 includes an X-axis galvano mirror 14a and an actuator 14b that rotatably supports the X-axis galvano mirror 14a. Similarly, the Y-axis galvano scanner 15 includes a Y-axis galvano mirror 15a and an actuator 15b that rotatably supports the Y-axis galvano mirror 15a. The X-axis galvano scanner 14 and the Y-axis galvano scanner 15 reflect the laser light transmitted through the dichroic mirror 13 and change the direction of the reflected laser light according to the rotation direction. That is, by rotating the X-axis galvano mirror 14a of the X-axis galvano scanner 14 and the Y-axis galvano mirror 15a of the Y-axis galvano scanner 15, two-dimensional scanning of the laser beam with respect to the workpiece W is possible.

  As shown in FIG. 3, the scanning direction of the X-axis galvano scanner 14 (X-axis galvano mirror 14a) and the scanning direction of the Y-axis galvano scanner 15 (Y-axis galvano mirror 15a) are configured to be orthogonal to each other. Further, the coordinate system of the print data is shifted by 45 degrees with respect to the coordinate system of the galvano scanners 14 and 15. That is, the first angle θ1 formed by one coordinate axis (x axis) of the two coordinate axes constituting the coordinate system of each galvano scanner 14 and 15 and the coordinate axis v constituting the coordinate system of the print data is 45 degrees, A second angle θ2 formed by one coordinate axis (y-axis) of the two coordinate axes constituting the coordinate system of each galvano scanner 14 and 15 and the coordinate axis v constituting the print data coordinate system is 45 degrees. . Note that the x-axis and the y-axis, which are two coordinate axes constituting the coordinate system of each galvano scanner 14, 15, are the scanning directions of each galvano scanner 14, 15. Then, by installing the laser marking device 10 so that the direction of the coordinate axis v of the print data coincides with the transport direction Td of the belt conveyor 50, the scanning direction of each galvano scanner 14, 15 with respect to the transport direction Td. It is set at a position shifted by 45 degrees.

  An fθ lens 16 is provided following the X-axis galvano scanner 14 and the Y-axis galvano scanner 15. The fθ lens 16 focuses the laser light whose beam diameter has been expanded by the beam expander 12 until a predetermined spot diameter is obtained on the surface of the workpiece W, and increases the energy density suitable for marking processing. In this manner, the surface of the workpiece W is marked by irradiating the workpiece W with the laser light.

  Further, the laser marking device 10 of the present embodiment has a visible light source 20 that emits guide light. The visible light source 20 can be composed of a laser diode (LD) or a light emitting diode (LED). The guide light is visible light having a wavelength in the visible region. The guide light emitted from the visible light source 20 enters the dichroic mirror 13 at an incident angle of 45 degrees. Thereby, the optical axis of the guide light coincides with the optical axis of the laser light transmitted through the dichroic mirror 13. The guide light reflected by the dichroic mirror 13 is applied to the workpiece W through the X-axis galvano scanner 14, the Y-axis galvano scanner 15 and the fθ lens 16. That is, the guide light can also be two-dimensionally scanned by the X-axis galvano scanner 14 and the Y-axis galvano scanner 15.

  Since the guide light is visible light, by irradiating the guide light, the operator can grasp the irradiation position of the laser light prior to the irradiation of the laser light. Further, if the guide light is two-dimensionally scanned along the marking shape, the operator can grasp in advance the state of the marking applied to the workpiece W. For example, the laser marking device 10 executes a guide mode in which the irradiation position of the laser beam is guided to the operator by the guide light only when marking the first workpiece W after the operation of the device 10 is started.

The laser marking device 10 has a controller 30 that controls each of these mechanisms.
The controller 30 includes a conveyance speed input unit 31, an X addition signal calculation unit 32, a Y addition signal calculation unit 33, a data generation unit 34, and a control unit 35.

For example, a signal related to the conveyance speed from a rotary encoder 51 that detects the conveyance speed of the belt conveyor 50 is input to the conveyance speed input unit 31.
The X addition signal calculation unit 32 calculates a correction value for correcting the coordinate data in the x direction based on the conveyance speed of the workpiece W. The Y addition signal calculation unit 33 calculates a correction value for correcting the coordinate data in the y direction based on the conveyance speed of the workpiece W. In the present embodiment, since the first angle θ1 and the second angle θ2 are the same as described above, the correction value (absolute value) in each direction with respect to the coordinate data based on the conveyance speed is the same.

  Here, for example, when the transport amount per predetermined time in the transport direction Td is Dz, since the first angle θ1 is 45 degrees, the X-axis galvano scanner 14 (X-axis galvano mirror 14a) scans for the same time. The transport amount D1 in the direction (x-axis direction) is 1 / √2 × Dz (≈0.707 × Dz). Similarly, the transport amount D2 in the scanning direction (y-axis direction) of the Y-axis galvano scanner 15 (Y-axis galvano mirror 15a) is 1 / √2 × Dz (≈0.707 × Dz).

  The data generation unit 34 generates coordinate data for the control unit 35 to control the galvano scanners 14 and 15 based on the print data input by the input unit 41 of the operation unit 40 that can be operated by the user. Here, as described above, the coordinate system of the print data is shifted by 45 degrees with respect to the coordinate system of the galvano scanners 14 and 15. Therefore, the data generation unit 34 performs 45-degree coordinate conversion when generating coordinate data from the print data.

  Further, the data generation unit 34 generates corrected coordinate data using the respective correction values calculated by the X addition signal calculation unit 32 and the Y addition signal calculation unit 33 and the coordinate data after coordinate conversion, and the correction The subsequent coordinate data is output to the control unit 35.

  The control unit 35 controls the actuators 14b and 15b that drive the galvanometer mirrors 14a and 15a based on the corrected coordinate data generated and output by the data generation unit 34. The control unit 35 is electrically connected to the light sources 11 and 20 and controls the emission of the laser light and the guide light.

Next, the scanning direction and scanning area by the galvano scanners 14 and 15 of the laser marking apparatus 10 configured as described above will be described.
Since the galvano scanners 14 and 15 of the present embodiment are capable of two-dimensional scanning by driving each, the scanable area A0 is rectangular as shown in FIG. In FIG. 2, the scannable area A0 is indicated by a solid line.

  Here, as described above, the scanning directions of the galvano scanners 14 and 15 are configured to be orthogonal to each other. The galvano scanners 14 and 15 have the transport direction Td between the scanning directions (x-axis and y-axis) of the galvano scanners 14 and 15 in a state where the laser marking device 10 is installed on the belt conveyor 50. At the same time, the scanning directions of the galvano scanners 14 and 15 are configured to form predetermined angles θ1 and θ2 with respect to the transport direction Td.

  That is, the galvano scanners 14 and 15 of this embodiment are in a state of being inclined by 45 degrees with respect to an axis (not shown) along the transport direction Td with respect to a conventional one in which each galvano scanner is orthogonal. Therefore, the scannable area A0 of the laser beam (guide light) by the galvano scanner 14 of this embodiment is set to be inclined 45 degrees with respect to the scannable area Ax (indicated by a two-dot chain line in FIG. 2) of the conventional galvano scanner. It has become. One diagonal line L1 of the diagonal lines L1 and L2 of the scannable area A0 is along the transport direction Td and the coordinate axis v of the print data, and the diagonal line L2 is orthogonal to the diagonal line L1. That is, since the direction along the diagonal line L1 of the scannable area A0 and the transport direction Td can be matched, the scannable area A0 is wider in the transport direction Td than the conventional scannable area Ax.

  By the way, as described above, the scannable area A0 is rotated by 45 degrees with respect to the conventional scannable area Ax. Therefore, when the scannable area A0 is simply viewed, a rhombus is formed (a shape in which a rectangle is inclined). Will be made.

  As shown in FIG. 4, for example, when a rectangular display unit 42 is employed, the transport direction Td is generally preferably a display mode along any side of the rectangular display unit 42. When the scannable area A0 as described above is displayed on such a display unit 42, a rhombus (inclined rectangle) area is displayed on the display unit 42, which may cause confusion to the user. . Therefore, in the display unit 42 of the present embodiment, the first marking area A1 in a display form along the side of the display unit 42 is rectangular in the scannable area A0, and the coordinate axis of the print data than the first marking area A1. Switching is possible between the second marking area A2 which is long in the direction along v (the transport direction Td) and has a display mode along the side of the display unit 42. These changes can be realized by operating an area changeover switch (not shown) provided in the operation unit 40.

  In the display unit 42, when print data is input, it is displayed along the side of one of the display units 42 (the horizontal direction (or vertical direction in FIG. 4)). Here, as described above, since the coordinate system (scanning direction) of each galvano scanner 14 and 15 and the coordinate system of the print data have a predetermined angle (45 degrees), simply converting the print data into coordinate data as it is. Actual printing is performed in a direction having a predetermined angle (45 degrees) with respect to the transport direction Td. Therefore, by performing the coordinate conversion by the data generation unit 34 as described above, the user can use the laser marking device 10 as in the conventional case without being aware of it.

  Further, the control unit 35 of the controller 30 controls the visible light source 20 and the galvano scanners 14 and 15 corresponding to the first marking area A1 when the guide mode is executed, for example, and corresponds to the first marking area A1. The guide light is irradiated to a region corresponding to the second marking area A2 by controlling the visible light source 20 and the galvano scanners 14 and 15 corresponding to the second marking area A2 A second guide mode. These are automatically switched according to the marking areas A1 and A2 selected on the display unit 42 of the operation unit 40.

Next, the operation of the laser marking device 10 configured as described above will be described.
In the laser marking device 10 of the present embodiment, when the print data information input by the input unit 41 of the operation unit 40 is input to the data generation unit 34 of the controller 30, coordinate data is obtained based on the print data. Generate. Here, as described above, the coordinate system of the print data and the coordinate system of the galvano scanners 14 and 15 are shifted by 45 degrees, and the vertical axis and the horizontal axis in the print data are the x-axis and y-axis of the coordinate data. On the other hand, since it is configured to form 45 degrees, coordinate conversion of 45 degrees is performed.

  Thereafter, the data generation unit 34 generates corrected coordinate data using the correction values calculated by the X addition signal calculation unit 32 and the Y addition signal calculation unit 33 and the coordinate data after coordinate conversion, and the corrected coordinates. Data is output to the control unit 35. The control unit 35 controls the actuators 14b and 15b that drive the galvano scanners 14 and 15 based on the corrected coordinate data generated and output by the data generation unit 34, and also controls the light sources 11 and 20. Controls the emission (output) of laser light and guide light.

  At this time, the laser marking device 10 of the present embodiment is configured such that the first angle θ1 and the second angle θ2 are the same (45 degrees). The transport direction Td is positioned between the scanning direction of the X-axis galvano scanner 14 and the scanning direction of the Y-axis galvano scanner 15 with the laser marking device 10 installed on the belt conveyor 50. For this reason, in order to follow the conveyance speed of the workpiece W in the conveyance direction Td, both the X-axis galvano scanner 14 and the Y-axis galvano scanner 15 are driven, in other words, shared by the X-axis galvano scanner 14 and the Y-axis galvano scanner 15. Will be driven.

  Here, as shown in FIG. 5, when the scanning direction (x-axis direction) of the X-axis galvano scanner 14 which is one of the galvano scanners is matched with the transport direction Td as in the prior art, per predetermined time in the transport direction Td. Is equal to the transport amount D1 in the x-axis direction per same time. That is, as shown in this embodiment, the galvano scanners 14 and 15 share the conveyance amounts D1 and D2 per predetermined time lower than the conveyance amount Dz.

Next, the effect of this embodiment will be described.
(1) The coordinate system of the print data and each galvano scanner are converted into coordinate data so as to be the coordinate system of the galvano scanners 14 and 15 set to have a predetermined angle with respect to the coordinate system of the print data. Even if the coordinate systems of 14 and 15 are different, the laser beam can be appropriately scanned. Here, for example, when the laser marking device 10 is installed so that the coordinate axis v constituting the coordinate system of the print data is along the transport direction Td, the coordinate system of each of the galvano scanners 14 and 15 is naturally at a predetermined angle with respect to the transport direction Td. And the coordinate system of each of the galvano scanners 14 and 15 is shifted with respect to the transport direction Td. For this reason, in order to make the laser beam follow the conveyance speed of the workpiece conveyed in the conveyance direction Td, the galvano scanners 14 and 15 share the scanning with the laser beam. Since the laser light is scanned in the transport direction Td in such a way as to be shared by the galvano scanners 14 and 15 as described above, the load on the galvano scanner is less than in the case where only one galvano scanner follows the transport speed as in the prior art. It can be reduced. As a result, since the scanning speed of each of the galvano scanners 14 and 15 with respect to the transport direction has a margin, the followability of scanning with respect to the transport speed is improved as compared with the conventional case where only one galvano scanner follows the transport speed. be able to.

(2) Since the first angle θ <b> 1 and the second angle θ <b> 2 are the same, the load for following the conveyance speed of the workpiece W can be the same for each galvano scanner 14, 15.
(3) Since the coordinate system of each of the galvano scanners 14 and 15 is 45 degrees with respect to the coordinate system of the print data, as described above, the load for making the galvano scanner 14 and 15 follow the workpiece conveyance speed is the same. Can be the same.

(4) Since the display unit can switch between the first marking area A1 and the second marking area A2, the convenience can be improved.
(5) The first marking area and the second marking area can be presented by the guide light on the workpiece W or the belt conveyor 50.

In addition, you may change the said embodiment as follows.
In the above-described embodiment, the signal of the rotary encoder 51 provided in the belt conveyor 50 (conveyance device) is used for the conveyance speed input unit 31. However, the configuration is not limited thereto. For example, a configuration in which the user sets (inputs) the conveyance speed in the operation unit 40 may be employed. Alternatively, the laser marking device 10 (the controller 30 or the operation unit 40) may be selected in advance from a plurality of set speeds, and the selected set speed may be used as the transport speed. In other words, the “workpiece conveyance speed” includes a speed obtained by detection, a speed at which the user inputs a speed, and a speed selected from a plurality of preset speeds provided in advance in the laser marking apparatus 10 itself.

  In the above-described embodiment, the configuration in which the content displayed on the display unit 42 can be switched between the first marking area A1 and the second marking area A2 is adopted. For example, you may employ | adopt the structure which displays both 1st marking area A1 and 2nd marking area A2, and the structure which displays only one of them in the state which cannot be switched. Moreover, you may employ | adopt the structure which does not display on the display part 42 1st marking area A1 and 2nd marking area A2.

  As shown in FIG. 6, for example, a configuration is adopted in which the first marking area A1 and the second marking area A2 are switched and displayed in a state where each is optimized (maximized) in the display area of the display unit 42. Also good.

  Although not specifically mentioned in the above embodiment, when the user inputs arbitrary print data within the scannable area A0, display and printing are automatically optimized (maximized) in the scannable area A0. A configuration may be adopted.

As an example, a method of optimizing within the scannable area A0 depending on the number of characters can be considered.
As shown in FIG. 7A, when the print data (input characters) is “ABCD”, the print data is displayed in the widest area within the scannable area A0. As shown in FIG. 7B, when the print data (input characters) are alphabets and various symbols, they are all included in the scannable area A0 and displayed in the largest state. In the example shown in FIG. 7B, line breaks are made every “ABCDEF”, “GHIJKL”, “MNOPQR”, “STUVWX”, and “YZ!? +-”.

  In the above embodiment, the scanning directions of the X-axis galvano scanner 14 and the Y-axis galvano scanner 15 are set to the coordinate axis v (transport direction Td) of the print data in a state where the laser marking device 10 is installed on the belt conveyor 50. However, these angles may be changed as appropriate. More specifically, if a vector component (synthetic vector component) along the conveyance direction of the workpiece W can be created by scanning in the respective scanning directions of the X-axis galvano scanner 14 and the Y-axis galvano scanner 15, each galvano You may change suitably the angle of each scanning direction of the scanners 14 and 15 and the coordinate axis v (conveyance direction Td) of printing data.

  In the above embodiment, the scanning direction (x-axis) of the X-axis galvano scanner 14 and the scanning direction (y-axis) of the Y-axis galvano scanner 15 are orthogonal to each other. For example, a configuration may be adopted in which the angle formed by the scanning direction (x-axis) of the X-axis galvano scanner 14 and the scanning direction (y-axis) of the Y-axis galvano scanner 15 is 60 degrees, for example. Also good. More specifically, if a vector component (synthetic vector component) along the transport direction Td can be created by scanning in each scanning direction with each galvano scanner 14, 15, You may change suitably the angle which a scanning direction makes.

  As described above, when the angle formed by the scanning direction of the X-axis galvano scanner 14 (x-axis direction) and the scanning direction of the Y-axis galvano scanner 15 (y-axis direction) is 60 degrees, the first angle θ1 and the first angle θ1 It is preferable to set the angle to 30 degrees so that the two angles θ2 are the same. With such a configuration, when the transport amount per predetermined time in the transport direction Td is Dz, the first angle θ1 is 30 degrees, so the scanning direction of the X-axis galvano scanner 14 (x-axis) per same time The conveyance amount D1 in the direction) is 1 / √3 × Dz (≈0.577 × Dz). Similarly, the carry amount D2 in the scanning direction (y-axis direction) of the Y-axis galvano scanner 15 is 1 / √3 × Dz (≈0.5777 × Dz).

  -You may combine the said embodiment and each modification suitably.

  DESCRIPTION OF SYMBOLS 10 ... Laser marking apparatus, 11 ... Laser light source (laser light emission means), 14 ... X-axis galvano scanner (1st galvano scanner), 14a ... X-axis galvanometer mirror which comprises X-axis galvano scanner, 14b ... X-axis galvano scanner 15... Y-axis galvano scanner (second galvano scanner), 15 a... Y-axis galvano mirror constituting the Y-axis galvano scanner, 15 b... Actuator constituting the Y-axis galvano scanner, 32. (Calculation means), 33 ... Y addition signal calculation section (calculation means), 34 ... Data generation section (coordinate conversion means), 35 ... Control section (control means), 42 ... Display section (display means), 50 ... Belt conveyor A0: Scannable area, A1: First marking area, A2: Second marking area, v: Coordinate axis, ... work, θ1 ... the first angle, θ2 ... the second angle.

Claims (5)

Laser light emitting means for emitting laser light;
First and second galvano scanners that scan the laser light emitted by the laser light emitting means while the respective scanning directions intersect with each other;
Control means for controlling driving of the laser beam emitting means and the first and second galvano scanners;
A laser marking device comprising:
When generating coordinate data based on the print data, the coordinate data is converted so that the coordinate system of the first and second galvano scanners is set to have a predetermined angle with respect to the coordinate system of the print data. Coordinate conversion means for performing, and calculation means for calculating respective correction values based on the coordinate system of the first and second galvano scanners with respect to the workpiece conveyance speed,
The control means controls the driving of the first and second galvano scanners based on the coordinate data converted by the coordinate conversion means and the correction values calculated by the calculation means. Marking device. The laser marking device according to claim 1,
The first and second galvano scanners have a first angle formed by one of two coordinate axes constituting the coordinate system of the first and second galvano scanners and a coordinate axis constituting the coordinate system of the print data, The second angle formed by one of the two coordinate axes constituting the coordinate system of the first and second galvano scanners and the coordinate axis constituting the coordinate system of the print data is configured to be the same angle. A laser marking device characterized by that. In the laser marking device according to claim 1 or 2,
The laser marking apparatus according to claim 1, wherein the first and second galvano scanners are configured such that the coordinate system forms 45 degrees with respect to the coordinate system of the print data. In the laser marking device according to any one of claims 1 to 3,
A display unit capable of displaying a marking area in a scannable area in which laser light can be scanned by the first and second galvano scanners;
The display means is configured to be switchable between a first marking area and a second marking area that is longer than the first marking area in a direction along a coordinate axis constituting a coordinate system of the print data. A laser marking device characterized by the above. The laser marking device according to claim 4,
Guide light emitting means for emitting visible light for grasping a marking area within a scannable area where laser light can be scanned by the first and second galvano scanners, the first and second galvano scanners, and the guide The control means for controlling the light emitting means,
The control means controls the guide light emitting means and the first and second galvano scanners, and scans the light emitted from the guide light emitting means so as to be the first marking area; And a second guide mode for scanning the light emitted from the guide light emitting means so as to be the second marking area.

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