KR20120007616A - Galvanometer scanner controller for laser processing apparatus - Google Patents

Galvanometer scanner controller for laser processing apparatus Download PDF

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Publication number
KR20120007616A
KR20120007616A KR1020100068238A KR20100068238A KR20120007616A KR 20120007616 A KR20120007616 A KR 20120007616A KR 1020100068238 A KR1020100068238 A KR 1020100068238A KR 20100068238 A KR20100068238 A KR 20100068238A KR 20120007616 A KR20120007616 A KR 20120007616A
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KR
South Korea
Prior art keywords
galvanometer scanner
control signal
laser processing
laser
processing apparatus
Prior art date
Application number
KR1020100068238A
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Korean (ko)
Inventor
권구철
임학규
Original Assignee
주식회사 케이랩
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to KR1020100068238A priority Critical patent/KR20120007616A/en
Publication of KR20120007616A publication Critical patent/KR20120007616A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/042—Automatically aligning the laser beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60—Preliminary treatment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Processing (AREA)

Abstract

The present invention relates to a galvanometer scanner controller for a laser processing apparatus. The galvanometer scanner controller for laser processing apparatus according to an embodiment of the present invention, the laser processing for controlling the driving of the galvanometer scanner for irradiating the laser beam output from the laser oscillator toward the workpiece to process the workpiece In a galvanometer scanner controller for a device, a control signal for receiving laser processing data from an external terminal to calculate a machining position on a workpiece, and outputting a digital control signal for driving the galvanometer scanner according to the machining position. A current signal for controlling the galvanometer scanner by receiving an analog control signal from an analog converter and an analog converter that receives a digital control signal from a generator and a control signal generator and converts the analog signal into an analog control signal. Generate and follow the current signal to galvano The emitter and includes a galvanometer scanner driving unit which drives the scanner, the control signal generator, an analog conversion unit and the galvanometer scanner drive section being provided inside the galvanometer scanner.

Description

Galvanometer scanner controller for laser processing apparatus

The present invention relates to a galvanometer scanner controller for a laser processing apparatus, and more particularly, a galvanometer for a laser processing apparatus that can simplify the configuration of the galvanometer scanner controller and facilitate the control of the galvanometer scanner controller. Relates to a scanner controller.

In general, laser processing apparatuses are used for processing fine work objects by various methods such as welding, cutting, hole drilling, and marking of workpieces. The laser processing apparatus is mainly composed of a laser unit and a driving unit (XY stage), and belongs to the field of advanced processing apparatus or system which requires both the optical technology of the laser itself, the processing application technology, and the driving unit control technology.

Among laser processing apparatuses, a laser marking apparatus is a device that prints characters or figures on a workpiece by using a laser beam. The laser marking apparatus can permanently print characters or figures, so that product names, It is widely used in many industries such as printing product information such as manufacturing number, manufacturing date and logo. When the laser marking device creates and inputs a marking pattern such as a character or a figure to be marked on an external input device such as a computer, the laser marking device drives a galvanometer scanner according to the laser marking data according to the marking pattern to generate a laser beam. Marking is performed on the workpiece by deflecting scanning in dimensions and controlling the on / off of the laser oscillator which outputs the laser beam in synchronization with the operation of the galvanometer scanner.

In general, a galvanometer scanner controller for controlling the operation of a galvanometer scanner includes a control signal generator that outputs a control signal for driving the galvanometer scanner according to the processing position of the workpiece, and receives the control signal as an analog. It consists of an analog converter for converting the control signal of the type. In the conventional galvanometer scanner controller, the control signal generator is installed in an external terminal such as a computer, and the analog converter is installed in the galvanometer scanner, and the XY2-100 protocol is used to transmit the control signal to the analog converter. Was used. Therefore, the conventional galvanometer scanner controller not only has a complicated configuration, but also requires an encoding and decoding process of the XY2-100 protocol for data transmission, thereby preventing the control of the galvanometer scanner controller.

Therefore, there is a need for a galvanometer scanner controller for a laser processing apparatus that can simplify the configuration of the galvanometer scanner controller and facilitate the control of the galvanometer scanner controller.

The present invention is designed to improve the above problems, the problem to be solved by the present invention, the control signal generation unit, the analog conversion unit and the galvanometer scanner driver constituting the galvanometer scanner controller inside the galvanometer scanner Galvanometer scanners for laser processing devices that can be installed in the system and connected to an external terminal and the galvanometer scanner controller through a data communication cable, simplifying the configuration of the galvanometer scanner controller and facilitating control of the galvanometer scanner controller. To provide a controller.

The technical problem of the present invention is not limited to those mentioned above, and another technical problem which is not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, the galvanometer for irradiating the laser beam output from the laser oscillator toward the workpiece to process the workpiece. A galvanometer scanner controller for a laser processing apparatus for controlling the driving of a scanner, comprising: receiving laser processing data from an external terminal, calculating a machining position on the workpiece, and driving the galvanometer scanner according to the machining position A control signal generator for outputting a control signal in digital form, an analog converter for receiving the digital control signal from the control signal generator and converting it into an analog control signal and the analog form from the analog converter Take the control signal input and go above A galvanometer scanner driver for generating a current signal for controlling a barometer scanner and driving the galvanometer scanner according to the current signal, wherein the control signal generator, the analog converter, and the galvanometer The scanner driver is installed inside the galvanometer scanner.

In addition, in order to achieve the above object, the control method of the galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, the laser beam output from the laser oscillator to process the workpiece toward the workpiece A control method of a galvanometer scanner controller for a laser processing apparatus for controlling the driving of a galvanometer scanner to be irradiated, wherein the laser processing data received through an external terminal is installed inside the galvanometer scanner through a data communication cable. Transmitting to a galvanometer scanner controller, outputting a digital control signal for driving the galvanometer scanner according to the processing position on the workpiece, and receiving the digital control signal in analog form. Converting to a control signal of the and Receiving the form of the control signal characterized in that generating a current signal for controlling the furnace meters the galvanic scanner, and driving the galvanometer scanner according to the current signal.

Specific details of other embodiments are included in the detailed description and the drawings.

According to a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, a control signal generator, an analog converter, and a galvanometer scanner driver constituting the galvanometer scanner controller are installed in the galvanometer scanner. The configuration of the galvanometer scanner controller can be simplified by connecting an external terminal and the galvanometer scanner controller via a data communication cable.

In addition, according to the galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, by transmitting the laser processing data to the galvanometer scanner controller using a serial communication such as RS-232C protocol of the protocol for data transmission The encoding and decoding process can be omitted, facilitating control of the galvanometer scanner controller.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view schematically showing the configuration of a laser processing apparatus according to an embodiment of the present invention.
Figure 2 is a perspective view schematically showing the configuration of a galvanometer scanner in a laser processing apparatus according to an embodiment of the present invention.
3 is a block diagram schematically showing the configuration of a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a control method of a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same or corresponding components in each drawing are given the same reference numerals.

Hereinafter, the present invention will be described with reference to the drawings for explaining a galvanometer scanner controller for a laser processing apparatus according to embodiments of the present invention.

1 is a perspective view schematically showing the configuration of a laser processing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the laser processing apparatus 100 according to an exemplary embodiment of the present invention may include a laser oscillator 110 that outputs a laser beam L, and a laser beam output from the laser oscillator 110. It may be configured to include a galvanometer scanner controller 130 for controlling the galvanometer scanner 120 and the galvanometer scanner 120 to irradiate L to the workpiece (W).

The laser oscillator 110 oscillates the laser beam L used for laser processing. The laser oscillator 110 is a solid laser oscillator 110 such as a Nd: YAG laser, a gas such as a CO 2 laser, depending on the medium used. Laser, liquid laser, and the like. For example, in the case of an Nd: YAG laser widely used for laser marking among laser processing apparatuses, the laser oscillator 110 includes a laser diode used as a light source and an Nd: YAG rod that amplifies light. (Rod) and a damper for opening and closing the output of the laser beam (L) and the Q-switch (Q-switch) to increase the power of the laser beam (L) to emit the laser beam (L) in the pulse mode of the appropriate frequency (Damper) may be included. The laser beam L output from the laser oscillator 110 passes through a beam expander 111, and at this time, the size of the laser beam L may be increased.

The galvanometer scanner 120 may irradiate the laser beam L generated from the laser oscillator 110 toward the workpiece W to process the workpiece W, and the galvanometer scanner 120 may be used. The two galvanometers may be used to control the irradiation position of the laser beam L by receiving laser processing data on the processing pattern of the workpiece W.

Figure 2 is a perspective view schematically showing the configuration of a galvanometer scanner in a laser processing apparatus according to an embodiment of the present invention.

The galvanometers 121 and 122 are a kind of actuator which rotates in a left-right direction according to an input control signal, and the control signal at this time uses a current value of an input signal. As shown in FIG. 2, the galvanometers 121 and 122 irradiate the laser beam L by using servo motors 121a and 122a and mirrors 121b and 122b connected thereto. The position can be controlled in the X-axis or Y-axis direction. In addition, encoders 121c and 122c for detecting a position of the mirrors 121b and 122b according to the rotation of the servo motors 121a and 122a and outputting a feedback signal may be connected to opposite sides of the mirrors 121b and 122b. have.

In addition, the lower end of the galvanometer (121, 122), the lens 124 for collecting the focus of the laser beam (L) incident through the galvanometer scanner 120 on the workpiece (W) can be installed. have. As the lens 124, an f-theta (f-θ) lens 124 may be used.

Although not shown, when the area to be laser processed is wide, a beam splitter for dividing the laser beam L is installed by using a transmittance of a mirror, and the laser beam L is split. The number of galvanometer scanner 120 and the lens 124 may be additionally installed. For example, a 50% beam splitter can be used to split the laser beam L into about two times the area of laser processing.

Referring back to FIG. 1, when the user creates and inputs a machining pattern of the workpiece W through an external terminal 140 such as a computer, the galvanometer scanner controller 130 generates laser processing data for the machining pattern. After generating, it is possible to control the driving of the galvanometer scanner 120 according to the laser processing data.

In FIG. 1, the configuration of the laser processing apparatus 100 is briefly described. Since the configuration of the general laser processing apparatus 100 is well known, a detailed description thereof will be omitted.

Hereinafter, the structure and control method of the galvano scanner controller 130 will be described with reference to FIGS. 3 and 4.

3 is a block diagram schematically showing the configuration of a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the galvanometer scanner controller 130 for a laser processing apparatus according to an exemplary embodiment of the present invention may include a control signal generator 131, an analog converter 132, and a galvanometer scanner driver ( 133).

The control signal generator 131 receives the laser processing data from the external terminal 140, calculates a machining position on the workpiece W, and uses a digital form to drive the galvanometer scanner 120 according to the machining position. The control signal can be output. The control signal generator 131 may be implemented through a digital signal processor (DSP).

The analog converter 132 may receive a digital control signal from the control signal generator 131 and convert it into an analog control signal. As the analog converter 132, it is preferable to use a digital-analog converter (DAC).

The galvanometer scanner driver 133 receives an analog control signal from the analog converter 132 to generate a current signal for controlling the galvanometer scanner 120, and the galvanometer scanner 120 according to the current signal. ) Can be driven.

On the other hand, as shown in Figure 1, in the case of the galvanometer scanner controller 130 for a laser processing apparatus according to an embodiment of the present invention, the control signal generator 131, the analog converter 132 and the galva The notch scanner driver 133 may be installed in the galvanometer scanner 120. In addition, the external terminal 140 and the control signal generator 131 may be connected through a data communication cable 141. Therefore, the configuration of the galvanometer scanner controller 130 can be simplified.

Preferably, the external terminal 140 may transmit the laser processing data to the control signal generator 131 using serial communication. As a serial communication system, methods, such as RS-232C (Recommended Standard-232C), USB (Universal Serial Bus), SPI (Serial Peripheral Interface), and I2C (Inter Integrated Circuit), can be used. Therefore, unlike the conventional XY2-100 protocol, since the encoding and decoding process of the protocol for data transmission can be omitted, the control of the galvanometer scanner controller 130 can be facilitated.

The galvanometer scanner controller 130 for a laser processing apparatus may be connected to an interface card 142 installed inside the external terminal 140 such as a computer. In addition, the galvanometer scanner controller 130 may be implemented in an embedded format.

As described above, in the galvanometer scanner controller 130 used in the present embodiment, the term '~ part' refers to software or a hardware component such as an FPGA or an ASIC, and '~ part' performs certain roles. However, '~' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, as an example, '~' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, galvanometer scanner drivers 133, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'. In addition, the components and '~' may be implemented to play one or more CPUs in the device or secure multimedia card.

Referring to the control method of the galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention configured as described above are as follows.

4 is a flowchart illustrating a control method of a galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention.

First, a user may create and input laser processing data for a processing pattern through the external terminal 140 (S201). In addition, the external terminal 140 may transmit the laser processing data to the control signal generator 131 through the data communication cable 141 (S202). The data communication cable 141 may be connected to an interface card 142 installed therein in the external terminal 140. Preferably, the external terminal 140 may transmit the laser processing data to the control signal generator 131 using serial communication such as RS-232C.

The control signal generator 131 may output a digital control signal for driving the galvanometer scanner 120 according to the processing position on the workpiece (S203). In addition, the analog converter 132 may convert the digital control signal received from the control signal generator 131 into an analog control signal (S204).

Finally, the galvanometer scanner driver 133 generates a current signal for controlling the galvanometer scanner 120 using an analog control signal received from the analog converter 132 (S205). The galvanometer scanner 120 may be driven according to the current signal to perform machining on the workpiece (S206).

As described above, according to the galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, the control signal generator, the analog converter, and the galvanometer scanner driver that constitute the galvanometer scanner controller are galvano. The configuration of the galvanometer scanner controller can be simplified by installing it inside the meter scanner and connecting the external terminal and galvanometer scanner controller via a data communication cable. In addition, according to the galvanometer scanner controller for a laser processing apparatus according to an embodiment of the present invention, by transmitting the laser processing data to the galvanometer scanner controller using a serial communication such as RS-232C protocol of the protocol for data transmission The encoding and decoding process can be omitted, facilitating control of the galvanometer scanner controller.

In the present invention, a laser marking apparatus is described as an example of a laser processing apparatus, but is not limited thereto. The present invention may be applied to various types of laser processing systems, such as a laser welding system.

On the other hand, in the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is merely used in a general sense to easily explain the technical details of the present invention and to help the understanding of the invention, It is not intended to limit the scope of the invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

<Explanation of symbols for the main parts of the drawings>
100: laser marking device
110: laser oscillator
120: galvanometer scanner
130: galvanometer scanner controller
140: external terminal

Claims (5)

In the galvanometer scanner controller for a laser processing apparatus for controlling the driving of the galvanometer scanner for irradiating the laser beam output from the laser oscillator toward the workpiece to process the workpiece,
A control signal generator which receives laser machining data from an external terminal, calculates a machining position on the workpiece, and outputs a digital control signal for driving the galvanometer scanner according to the machining position;
An analog converter which receives the digital control signal from the control signal generator and converts the digital control signal into an analog control signal; And
A galvanometer scanner driver configured to receive a control signal of the analog type from the analog converter to generate a current signal for controlling the galvanometer scanner, and to drive the galvanometer scanner according to the current signal,
The control signal generator, the analog converter and the galvanometer scanner driver is installed in the galvanometer scanner galvanometer scanner controller, characterized in that the installation. The method of claim 1,
Galvanometer scanner controller for a laser processing apparatus, characterized in that the external terminal and the control signal generator is connected via a data communication cable. The method of claim 2,
The external terminal generates the control signal using serial communication such as RS-232C (Recommended Standard-232C), Universal Serial Bus (USB), Serial Peripheral Interface (SPI), Inter Integrated Circuit (I2C), and the like. Galvanometer scanner controller for laser processing apparatus, characterized in that the transmission to the negative. In the control method of the galvanometer scanner controller for a laser processing apparatus which controls the drive of the galvanometer scanner which irradiates the laser beam output from a laser oscillator toward the said workpiece to process a to-be-processed object,
Transmitting laser processing data received through an external terminal to the galvanometer scanner controller installed inside the galvanometer scanner through a data communication cable;
Outputting a control signal in digital form for driving the galvanometer scanner according to the machining position on the workpiece;
Receiving the digital control signal and converting it into an analog control signal; And
Receiving an analog control signal to generate a current signal for controlling the galvanometer scanner, and driving the galvanometer scanner according to the current signal. How to control the meter scanner controller. The method of claim 4, wherein
The external terminal transmits the laser processing data by using serial communication such as RS-232C (Recommended Standard-232C), USB (Universal Serial Bus), SPI (Serial Peripheral Interface), I2C (Inter Integrated Circuit), etc. A control method of a galvanometer scanner controller for a laser processing apparatus, characterized by transmitting to a scanner controller.
KR1020100068238A 2010-07-15 2010-07-15 Galvanometer scanner controller for laser processing apparatus KR20120007616A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101425862B1 (en) * 2013-02-26 2014-08-01 안동과학대학교 산학협력단 Apparatus and control method for portable laser ruler
KR101599861B1 (en) * 2015-07-27 2016-03-04 이노포토닉스 주식회사 3D scanner control board for 5-axis machine
KR20190101796A (en) * 2018-02-23 2019-09-02 한미반도체 주식회사 Partial shield processing method for semiconductor member
WO2023239021A1 (en) * 2022-06-08 2023-12-14 주식회사 케이랩 Laser processing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101425862B1 (en) * 2013-02-26 2014-08-01 안동과학대학교 산학협력단 Apparatus and control method for portable laser ruler
KR101599861B1 (en) * 2015-07-27 2016-03-04 이노포토닉스 주식회사 3D scanner control board for 5-axis machine
KR20190101796A (en) * 2018-02-23 2019-09-02 한미반도체 주식회사 Partial shield processing method for semiconductor member
WO2023239021A1 (en) * 2022-06-08 2023-12-14 주식회사 케이랩 Laser processing apparatus

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