JP2004351516A - Laser marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser marking device capable of performing printing corresponding to various kinds of objects to be printed while suppressing the replacement cost as much as possible. <P>SOLUTION: A laser beam source 10 is stored in a casing 11, and unitized as a laser beam emission unit 12. A galvano-scanner 20 is stored in a casing 21, and unitized as a scanning unit 22, and a control unit 30 is stored in a casing 31 and unitized as a controller unit 32. The laser beam emission unit 12, the scanning unit 22 and the controller unit 32 can be replaced respectively with similar or dissimilar kinds thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser marking device.
[0002]
[Prior art]
This type of laser marking apparatus mainly includes a laser light source, a galvano mirror that reflects and changes the direction of the laser beam emitted from the laser beam, a driving unit that rotates the galvano mirror, and a laser beam from the galvano mirror. A converging lens for converging and irradiating the object to be printed and a control means are provided. The control means gives a control signal to the laser light source to control the output operation, and also gives the galvano driving means coordinate data corresponding to the print information relating to characters, symbols and figures (hereinafter referred to as “characters”) to be printed. Thus, the rotation angle of the galvanometer mirror is controlled so that the characters and the like are printed on the print object.
[0003]
By the way, in recent years, there are various types (for example, material, shape, size, etc.) of print objects printed by the laser marking device. Therefore, in order to print a desired character or the like on them with a predetermined print quality, it is necessary to irradiate with a laser output corresponding to the material of each print object, and a print according to the size of the print object. It is also necessary to secure an area. However, the laser output and printing area in a single laser marking device are determined by the characteristics of the laser light source, converging lens and galvanometer mirror provided in the laser marking device. In some cases, a print area cannot be secured and desired characters or the like cannot be printed with a predetermined print quality. Therefore, there is a method of separately preparing a laser marking device provided with a laser light source having other characteristics, but the laser marking device itself is very expensive and is not preferable in terms of cost.
[0004]
On the other hand, the following Patent Document 1 discloses a laser marking device in which a head unit that accommodates a laser light source, a galvanometer mirror, and a converging lens can be replaced with a controller having a control means. Patent Document 2 below discloses a laser marking device in which only the converging lens can be replaced.
[0005]
[Patent Document 1]
JP 2001-62580 A
[Patent Document 2]
JP 2003-88965 A
[0006]
[Problems to be solved by the invention]
However, in the case of the above-mentioned Patent Document 1, for example, even when only the laser light source is to be replaced, the entire head unit has to be replaced, and there is a problem that the replacement cost is increased. Further, from the viewpoint of the producer, it is necessary to produce a plurality of types of heads corresponding to various combinations of laser output intensities and print areas, resulting in a problem that production costs and management costs increase. .
In the case of Patent Document 2, there may be a case where a desired print area cannot be ensured only by exchanging the converging lens. If the material of the printing object is different, it is necessary to prepare a laser marking device having a different laser light source.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laser marking apparatus capable of performing printing corresponding to various printing objects while minimizing the replacement cost.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a laser marking device according to claim 1 includes a laser light source that emits laser light, a galvano mirror that reflects the laser light from the laser light source and changes its direction, and the galvano mirror. A galvano driving means for rotating, a converging lens for converging the laser light from the galvano mirror and irradiating the object to be printed, a control signal to the laser light source to control the output operation, and characters to be printed A laser marking device comprising: control means for controlling the rotation angle of the galvano mirror by giving coordinate data corresponding to printing information relating to symbols and figures to the galvano driving means. Housed in the body and unitized as a laser emitting unit, the laser emitting unit includes the control means Output side input means capable of transmitting a signal between and an emission means for emitting laser light from the laser light source to the galvano mirror outside the housing, and from the control means via the emission side input means The laser emission unit is configured to be exchangeable with at least another laser emission unit that houses a different type of laser light source, and the other laser emission unit is configured to receive the control signal. The present invention is characterized in that it comprises an output side input means capable of transmitting a signal to and from the means, and an output means for emitting the laser light from the laser light source to the galvanometer mirror outside the housing.
[0009]
According to a second aspect of the present invention, in the laser marking apparatus according to the first aspect, the different types of laser light sources are laser light sources having different wavelengths of emitted laser light.
[0010]
According to a third aspect of the present invention, in the laser marking device according to the first or second aspect, laser light source information for storing laser light source identification information relating to the laser light source accommodated in the laser emission unit in the laser emission unit. A storage unit and an output side output unit capable of transmitting a signal between the control unit and the control unit from the laser light source information storage unit of the laser emission unit currently installed; The laser light source identification information is read through the means, and the control operation of at least one of the laser light source and the galvanometer mirror is changed based on the laser light source identification information.
[0011]
According to a fourth aspect of the present invention, in the laser marking device according to any one of the first to third aspects, the galvano mirror, the galvano driving means, and the converging lens are accommodated in one housing as a scanning unit. Unitized,
The scanning unit includes scanning side input means capable of transmitting signals to and from the control means, and laser light introducing means for guiding laser light from the laser emitting unit to the galvanometer mirror side, and the scanning side The coordinate data from the control means is received by the galvano driving means via the input means,
The scanning unit is configured to be exchangeable with at least another scanning unit having different types of scanning characteristics, and the other scanning unit includes scanning side input means capable of transmitting signals to and from the control means. And a laser beam introducing means for guiding the laser beam from the laser emitting unit to the galvanometer mirror side.
The “scanning characteristics” referred to in the present invention includes, for example, the characteristics of the converging lens, the rotational operation characteristics of the galvanometer mirror, or the size of the print area on the print object determined by those characteristics.
[0012]
According to a fifth aspect of the present invention, in the laser marking device according to the fourth aspect, the scanning unit stores scanning characteristic information relating to at least one of the galvanometer mirror and the converging lens accommodated in the scanning unit. Storage means and scanning output means capable of transmitting signals between the control means, the control means from the scanning characteristic information storage means of the currently installed scanning unit to the scanning output means The scanning characteristic information is read via the control information, and the control operation of at least one of the laser light source and the galvanometer mirror is changed based on the scanning characteristic information.
[0013]
According to a sixth aspect of the present invention, in the laser marking apparatus according to any one of the first to fifth aspects, the control means is accommodated in a single casing separately from the laser emitting unit and the scanning unit. As a unit, and is configured to be exchangeable with at least another different control unit.
[0014]
According to a seventh aspect of the present invention, in the laser marking device according to any one of the first to sixth aspects, the laser light source includes an oscillator power supply and a laser beam corresponding to the power supplied from the oscillator power supply. And a laser oscillator that emits,
Each of the oscillator power supply and the laser oscillator is housed in a single casing and unitized, and is characterized in that it can be exchanged with at least different types.
[0015]
[Action and effect of the invention]
<Invention of Claim 1>
According to this configuration, the laser light source is housed in one casing separately from the galvano mirror, the galvano driving unit, the converging lens, and the control unit, and unitized as a laser emission unit together with the emission unit and the emission side input / output unit. ing. The laser emission unit is configured to be exchangeable with another laser emission unit that houses at least a different (including the same type) laser light source. Therefore, for example, when it is desired to replace with a different laser light source having an optimal laser output (laser output intensity, output format of pulsed light or continuous light, etc.) according to the material of the printing object, or the same type due to deterioration over time. When it is desired to replace the laser light source, only the laser emitting unit portion of the laser marking device needs to be replaced, and the replacement cost can be suppressed.
[0016]
<Invention of Claim 2>
According to this configuration, it is possible to deal with a printing object made of materials having different absorption wavelengths by simply replacing the laser emission unit, and it is possible to reduce the replacement cost.
[0017]
<Invention of Claim 3>
When the laser output unit is replaced, the refractive index at the converging lens changes due to the difference in the characteristics of the laser light from the laser light source contained in it (for example, the difference in wavelength), and the galvanometer mirror is controlled based on the coordinate data before replacement. In this case, the size of the print area or the characters to be printed may change.
[0018]
Therefore, according to this configuration, each laser emission unit is provided with laser light source information storage means for storing laser light source identification information relating to the laser light source accommodated by itself, and the control means, for example, powers on the laser marking device At the time or before the start of the printing operation, the control operation of at least one of the laser light source and the galvanometer mirror is changed based on the laser light source identification information stored in the laser light source information storage means. For example, the control means corrects the coordinate data so that the print area range on the print object is within a predetermined range (for example, the same range as the print area before replacing the laser emission unit) based on the laser light source identification information. Operates to give to galvano drive means.
Therefore, it is possible to secure a desired print area while suppressing the influence due to the difference in characteristics of the laser light sources accommodated in the respective laser emission units.
[0019]
<Invention of Claim 4>
According to this configuration, even when it is desired to change the print area, only the scanning unit needs to be replaced, so that the replacement cost can be suppressed. From the producer's side, if various emission units and scanning units are manufactured, a plurality of laser marking devices having various laser outputs and printing areas according to the combination of them can be produced. The use of parts makes it possible to reduce production costs and management costs.
[0020]
<Invention of Claim 5>
According to this configuration, the control means includes, for example, a laser light source and a galvanometer mirror based on the scanning characteristic information stored in the scanning characteristic information storage means of the scanning unit when the laser marking device is turned on or before the printing operation is started. At least one of the control operations is changed. For example, the control means makes the print area on the print object a desired print area according to the characteristics of at least one of the galvanometer mirror and the converging lens, or the laser light source identification information of the currently installed laser emission unit. The coordinate data corrected as described above is applied to the galvano driving means. Accordingly, it is possible to accurately secure a desired print area for various combinations of the scanning unit and the laser emitting unit.
[0021]
In addition, the following structures may be sufficient.
“The laser marking device according to claim 4, wherein the scanning unit corrects the coordinate data from the control means into coordinate data suitable for characteristics of the galvanometer mirror and / or the convergent lens accommodated therein. 5. The laser marking apparatus according to claim 4, further comprising coordinate data correcting means for giving to the galvano driving means.
“Adapted coordinate data” refers to coordinate data that makes the printable range by the operation of each scanning unit a predetermined printable range.
[0022]
<Invention of Claim 6>
According to this configuration, it is possible to replace only the control unit portion, and it is possible to reduce the replacement cost. In addition, from the producer side, in addition to various emission units and scanning units, the control means is also unitized, so that parts for a plurality of laser marking devices having various laser outputs and printing areas can be obtained. It can be shared to further reduce production costs and management costs.
[0023]
<Invention of Claim 7>
The laser light source is configured by a combination of a unitized oscillator power supply and a laser oscillator. Therefore, various power sources for oscillators (laser output format (pulsed light or continuous light), laser output intensity (duty ratio, output amplitude level)), and various laser oscillators (for example, CO ₂ Multiple types of laser light sources that emit laser light with various characteristics can be configured by combining laser oscillators or YAG laser oscillators). The replacement cost is also on the user side, and the production cost and management cost on the producer side. Can be suppressed.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
1. Overview of laser marking equipment
The entire laser marking device 1 of this embodiment is shown in FIG. 1. In FIG. 1, reference numeral 10 denotes a laser light source, and the direction of the laser light L emitted therefrom is changed by the galvano scanner 20. Is done. The galvano scanner 20 includes a pair of galvanometer mirrors 20V and 20W, drive means 20X and 20Y, and a converging lens 20Z. One galvanometer mirror 20V can shift the angle in the vertical direction by the drive means 20X, and the other The galvanometer mirror 20W can be shifted in the lateral direction by the driving means 20Y. The laser beam L from the other galvanometer mirror 20W is converged by the converging lens 20Z, and an irradiation point of the laser beam L is formed on the print target W. The two galvanometer mirrors 20V and 20W change the direction of the laser beam L in two directions, and the irradiation point moves two-dimensionally on the print target W.
[0025]
The control unit 30 generates a plurality of coordinate data corresponding to the print position on the print object W and an on / off control signal based on print information relating to characters to be printed. Then, the control unit 30 sequentially gives a plurality of coordinate data to the galvano scanner 20 at a predetermined timing to control the rotation angles of the galvano mirrors 20V and 20W, and gives an on / off control signal to the laser light source 10 to turn on / off. To control.
With the above configuration, the above-described characters and the like can be printed on the printing object W.
[0026]
2. Detailed explanation of each unit
In the present embodiment, as shown in FIG. 2, the laser light source 10 is accommodated in a housing 11 and unitized as a laser emission unit 12. Further, the galvano scanner 20 (see FIG. 1) is accommodated in the casing 21 and unitized as the scanning unit 22, and the control unit 30 is accommodated in the casing 31 and unitized as the controller unit 32. . The laser emitting unit 12, the scanning unit 22, and the controller unit 32 are interchangeable with the same type or different types.
[0027]
(1) Laser emission unit
Specifically, the laser emission unit 12 includes an input / output circuit 13 for exchanging signals with the laser light source 10 inside the housing 11 in the laser marking device 1 (the “output side input / output of the present invention”). And a laser information storage unit 14 which is a memory (specifically, an EEPROM which is a non-volatile memory). The input / output circuit 13 is electrically connected to the laser information storage unit 14 and the laser oscillator 17. Further, the laser light L from the laser light source 10 is guided to the outside through an optical fiber cable 16 inserted through, for example, an opening 15 formed in the wall portion of the housing 11.
[0028]
Next, in the laser information storage unit 14, for the laser light source 10, for example, identification information on at least one of the following (a) to (c) (corresponding to “laser light source identification information” of the present invention): Is remembered.
(A) Type of laser light source 10 (for example, YAG laser as solid laser, CO as gas laser) ₂ Laser, fiber laser, etc.), or the wavelength of laser light that varies depending on the type.
(B) Output format of emitted laser light (continuous light, pulsed light).
(C) Laser power (duty ratio and output amplitude level when the emitted laser light is pulsed light, peak value when it is continuous light, etc.).
[0029]
Furthermore, in the present embodiment, the laser light source 10 includes a laser oscillator 17 and an oscillator power supply 18 for supplying power to the laser oscillator 17. These are housed in separate housings to form a unit, and are detachably provided in the housing 11.
[0030]
(2) Scanning unit
The scanning unit 22 has an input / output circuit 23 (corresponding to the “scanning side input / output means” of the present invention) and D / A conversion in the housing 21 for exchanging signals with the galvano scanner 20 with the outside. The device 24, the servo circuit 25, the proximity state detection unit 26, and the print area information storage unit 27 are accommodated. The input / output circuit 23 is electrically connected to each of the D / A converter 24, the proximity state detection unit 26, and the print area information storage unit 27. The housing 22 is formed with an opening 28 (corresponding to the “light introducing means” of the present invention) for inserting the distal end side of the optical fiber cable 16 led out from the laser emitting unit 12. 28, the tip of the optical fiber cable 16 is positioned, and the emitted laser light L from this tip is guided to the galvanometer mirrors 20V, 20W side. The converging lens 20Z is fitted into a mounting opening formed through the housing 21.
[0031]
Next, the D / A converter 24 converts a plurality of coordinate data sent from the controller unit 32 side via the input / output circuit 23 into voltages corresponding to the respective coordinate data. The servo circuit 25 controls the driving means 20X and 20Y (see FIG. 1) of the galvanometer mirrors 20V and 20W based on the voltage from the D / A converter 24. The proximity state detection unit 26 includes a comparator 26A, a window comparator 26B, an angle sensor 26C, and a differentiation circuit 26D. And the end point which is the start point and the end point of each line segment printed based on the voltage corresponding to each coordinate data from the D / A converter 24 and the voltage corresponding to the rotation angle of the galvanometer mirrors 20V, 20W. An approaching state of the irradiation point with respect to the coordinate data is detected, and a signal is given to the servo circuit 25.
[0032]
Print area information is stored in the print area information storage unit 27 which is a memory (specifically, an EEPROM which is a nonvolatile memory). This fluctuates due to a difference in characteristics of the converging lens 20Z, a size of the galvanometer mirrors 20V and 20W, a difference in rotation angle range, and a difference in rotation characteristics. Accordingly, the print area information includes information on the characteristics of the converging lens 20Z, the size rotation angle ranges and rotation characteristics of the galvano mirrors 20V and 20W, or information indicating the range of the print area itself determined based on them. May be.
[0033]
(3) Controller unit
The controller unit 32 has an input / output circuit 33 (the “control-side input / output” of the present invention) for exchanging signals with the control unit 30 in the housing 31 detachably provided in the main body case. And the memory 34 are accommodated. The input / output circuit 33 is electrically connected to the control unit 30 and is detachable from the input / output circuit 13 of the laser emitting unit 12 and the input / output circuit 23 of the scanning unit 22 via connectors 40 and 41, for example. Thus, they are connected (electrically) so that signals can be transmitted.
[0034]
The control unit 30 is a font information storage unit based on data on a desired character or the like and a print position input from a console provided separately from the controller unit 32 and connected to the controller unit 32, for example. Font information stored in a font storage area in a certain memory 34 is read out, divided into predetermined line elements and generated as print data, and the print data is actually positioned on the print area based on a predetermined conversion coefficient. Convert to multiple coordinate data shown. Then, each coordinate data is sequentially sent to the D / A converter 24 via the input / output circuit 33 and the input / output circuit 23 of the scanning unit 22 at a predetermined timing according to the set printing speed.
[0035]
Now, for example, the control unit 30 responds to the laser light source identification information stored in the laser information storage unit 14 of the laser emission unit 12 or the print area information stored in the print area information storage unit 27 of the scanning unit 22. The conversion coefficient is corrected, and coordinate data is generated based on the correction coefficient. Specifically, a plurality of conversion coefficient correction data are stored in a predetermined storage area of the memory 34 in association with the laser light source identification information and the print area information. The acquired laser light source identification information and area information are stored in the acquired laser light source identification information and area information. Correspondingly, the conversion coefficient correction data is read out, and coordinate data corresponding to the conversion coefficient correction data is generated.
[0036]
This makes it possible to set a predetermined printing area based on appropriate conversion coefficient correction data even when the scanning unit 22 is replaced with another converging lens or a galvanometer mirror having different characteristics. Further, as shown in FIG. 3, a laser emission unit 12A provided with a YAG laser oscillator 17A is ₂ When the laser emission unit 12B having the laser oscillator 17B is replaced, the wavelength of the emission laser light L is different between the two. Therefore, the refractive index of the laser beam L in the converging lens 20Z changes due to the difference in wavelength, and the printing area changes. Therefore, it is possible to prevent fluctuations in the printing area by storing conversion coefficient correction data that does not change the printing area before and after replacement in association with the wavelength information of each laser emission unit 12.
[0037]
(4) Combination pattern of each unit
In the present embodiment, as shown in FIG. 4, various types are prepared for each unit 12, 22, 32. Specifically, for the scanning unit 22, a small head, a medium head, and a large head are prepared according to the size of characters or the like to be printed. These differ, for example, in the size of the galvanometer mirrors 20V and 20W and the converging lens 20Z, and the drive characteristics of the galvano drive means 20X and 20Y. Due to these differences, each scanning unit 20 differs in the size of the printing area, the size of the irradiation point of the laser beam L on the printing object (the size of the spot diameter), and the maximum printing speed. For the laser emission unit 12, for example, four types of oscillator power supplies 18 of continuous 5 W output, continuous 10 W output, pulse 10 W output, and continuous 20 W output can be exchanged for type 1 of the YAG laser oscillator 17A. Has been. Further, for type 2 of the YAG laser oscillator 17A having a higher output type than type 1 described above, for example, two types of oscillator power supplies 18 having a pulse 20 W output and a continuous 50 W output are prepared so as to be exchangeable.
[0038]
Accordingly, six types of laser output units can be configured by combining these, and the user can change the output characteristics of the laser beam L by exchanging only the oscillator power supply 18, thereby reducing the replacement cost. Can be achieved. Further, for the producer side, it is possible to reduce the production cost and the management cost by making the parts common to the laser oscillator 17. CO ₂ Similarly for lasers, various types of CO ₂ A laser oscillator 17 and an oscillator power supply 18 are prepared.
3. Effects of this embodiment
[0039]
As described above, each part constituting the laser marking device 1 is unitized as the laser emission unit 12, the scanning unit 21, and the controller unit 32, and can be exchanged with the same or different types of units. For example, when it is desired to irradiate the laser beam L having a wavelength corresponding to the absorption wavelength of the printing object W, only the laser emission unit 12 needs to be replaced, and the replacement cost can be reduced. On the other hand, the producer can prepare various laser marking apparatuses 1 corresponding to various print objects W by combining the units 12, 22, and 32 as shown in FIG. By sharing parts, production costs and management costs can be reduced.
[0040]
<Other embodiments>
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.
(1) In the above embodiment, the laser emitting unit 12, the scanning unit 22, and the control unit are provided so that each unit can be replaced. However, the present invention is not limited to this, and a galvano mirror other than the components of the laser light source 10. The converging lens, the galvano driving means, and the control unit may not be unitized.
(2) In the above embodiment, the units are connected to each other so that an electrical signal can be transmitted through the connector. However, the present invention is not limited to this. A configuration for exchanging information may be employed.
(3) The unit 12, 22, and 32 may be housed in one housing, and each unit 12, 22, and 32 may be installed to be replaceable with respect to the housing.
(4) In the above embodiment, the laser emitting unit 12 and the scanning unit 22 are optically connected via an optical fiber. However, the present invention is not limited to this, and an optical fiber is not provided, and lasers are provided to each other. A laser light source is provided by a connecting means for positioning and fixing the laser emitting unit 12 and the scanning unit 22 so that the light passing means (for example, the openings 15 and 28 in the above-described embodiment, or the configuration in which the light transmitting members are closed) face each other. The galvanometer mirrors 20V and 20W may be irradiated with the laser beam L from the beam 10.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a laser marking device according to an embodiment of the present invention.
FIG. 2 is a block diagram of each unit.
FIG. 3 is a block diagram when replacing the laser emission unit.
FIG. 4 shows each unit pattern table prepared in this embodiment.
[Explanation of symbols]
1 ... Laser marking device
10 ... Laser light source
11, 22, 31 ... casing
12 (12A, 12B) ... Laser emission unit
13. Input / output circuit (output side input / output means)
14 ... Laser information storage unit
15 ... Opening (outgoing means)
16: Optical fiber cable (outgoing means)
17 (17A, 17B) ... Laser oscillator
18 ... Power supply for oscillator
20V, 20W ... Galvano mirror
20X, 20Y ... Driving means
20X, 20Y ... Driving means
20Z ... Convergent lens
21 ... Case
22 Scanning unit
23. Input / output circuit (scanning side input / output means)
27: Print area information storage unit
28 ... Opening (light introducing means)
30 ... Control unit
32 ... Controller unit
33 ... Input / output circuit (control-side input / output means)
34 ... Memory
L ... Laser light
W ... Printed object

Claims (7)

A laser light source for emitting laser light;
A galvanometer mirror that reflects the laser light from the laser light source and changes its direction;
Galvano driving means for rotating the galvanometer mirror;
A converging lens for converging the laser light from the galvanometer mirror and irradiating it on a printing object;
The control signal is given to the laser light source to control the output operation, and the rotation angle of the galvano mirror is controlled by giving the galvano driving means the coordinate data corresponding to the print information on the characters, symbols and figures to be printed. In a laser marking device comprising a control means for
The laser light source is housed in one housing and unitized as a laser emission unit,
The laser emission unit includes an output side input means capable of transmitting a signal to and from the control means, and an emission means for emitting laser light from the laser light source to the galvanometer mirror outside the housing. Configured to receive the control signal from the control means via the output side input means,
In addition, the laser emission unit is configured to be exchangeable with at least another laser emission unit that accommodates a different type of laser light source, and the other laser emission unit is capable of transmitting signals to and from the control means. A laser marking apparatus, comprising: side input means; and emission means for emitting laser light from the laser light source to the galvanometer mirror outside the housing. 2. The laser marking apparatus according to claim 1, wherein the different types of laser light sources are laser light sources having different wavelengths of emitted laser light. The laser emission unit includes laser light source information storage means for storing laser light source identification information regarding the laser light source accommodated in the laser emission unit, and output-side output means capable of transmitting signals between the control means. And
The control means reads the laser light source identification information from the laser light source information storage means of the currently installed laser emission unit via the emission side output means, and based on the laser light source identification information, the laser light source identification information 3. The laser marking device according to claim 1, wherein a control operation of at least one of the galvanometer mirror is changed. The galvano mirror, the galvano driving means and the converging lens are accommodated in one housing and unitized as a scanning unit,
The scanning unit includes scanning side input means capable of transmitting signals to and from the control means, and laser light introducing means for guiding laser light from the laser emitting unit to the galvanometer mirror side, and the scanning side The coordinate data from the control means is received by the galvano driving means via the input means,
The scanning unit is configured to be exchangeable with at least another scanning unit having different types of scanning characteristics, and the other scanning unit includes scanning side input means capable of transmitting signals to and from the control means. 4. A laser marking device according to claim 1, further comprising laser light introducing means for guiding laser light from the laser emitting unit to the galvanometer mirror side. The scanning unit includes a scanning characteristic information storage unit that stores scanning characteristic information relating to at least one of the galvanometer mirror and the converging lens accommodated in the scanning unit, and a scanning side capable of transmitting a signal between the control unit Output means,
The control unit reads the scanning characteristic information from the scanning characteristic information storage unit of the currently installed scanning unit via the scanning side output unit, and based on the scanning characteristic information, the laser light source and the galvanoscope are read. 5. The laser marking device according to claim 4, wherein the control operation of at least one of the mirrors is changed. The control means is housed in a single casing separately from the laser emitting unit and the scanning unit and is unitized as a control unit, and is configured to be exchangeable with at least another different control unit. The laser marking device according to any one of claims 1 to 5. The laser light source is configured to include an oscillator power source and a laser oscillator that emits laser light according to the power supplied from the oscillator power source.
7. The oscillator power source and the laser oscillator are each housed in a single housing and unitized, and are interchangeable with at least different types. The laser marking apparatus in any one.

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