JP4436809B2 - Laser processing system - Google Patents

Description

  The present invention relates to a laser processing system.

  2. Description of the Related Art A laser processing system is known that includes a laser processing machine that can operate along specific control axes such as three orthogonal axes of a machine tool and a rotation axis of a manipulator. This laser processing system generally includes a shaft driving unit (including a servo amplifier and a servo motor) that drives a control axis of a laser processing machine, a laser oscillator that supplies laser light to the laser processing machine, a shaft driving unit, and a laser oscillator It is comprised including the control apparatus which controls this, and other peripheral devices (for example, refer patent document 1).

  In the above laser processing system, the control device is usually connected to the shaft drive unit, the laser oscillator, and other required peripheral devices using respective separate interfaces. Then, the control device sends a movement command to the servo amplifier of the required shaft drive unit at a predetermined command cycle (for example, an interpolation cycle in numerical control) according to the given laser processing program to operate the servo motor, The control axis is driven to move the table on which the workpiece is placed and the machining nozzle that emits laser light along the designated path. At the same time, the control device sends commands related to various output conditions such as laser beam emission, stop, peak power, and frequency to the laser oscillator in accordance with the laser machining program, usually at the same command cycle as the axis movement command cycle. As a result, the laser oscillator supplies a laser beam with a desired output to the laser processing machine at a desired time point during the operation of the laser processing machine, and executes laser processing.

  Within the control device, movement command data sent to the servo amplifier (referred to herein as movement data) and output condition command data sent to the laser oscillator (referred to herein as laser output condition data) are given. They are generated simultaneously based on the laser processing program. However, the interface of the control device connected to the servo amplifier and the interface of the control device connected to the laser oscillator usually have different data transfer cycles (that is, specific transfer timings) and transfer speeds. There is a time difference between the time when the command is received and the time when the laser oscillator receives the command. The time difference related to this data transfer becomes a factor of reducing the laser processing accuracy.

  For example, in order to reduce the cycle time of laser processing, required laser processing may be performed by repeatedly emitting and stopping laser light while operating the laser processing machine at a substantially constant speed. In such a case, there is a concern that the actual laser processing start point and end point on the material to be processed deviate from the target position due to the time difference related to the data transfer described above. In addition, the change point of the laser output condition specified by the machining program (for example, the start or end of laser oscillation) does not necessarily coincide with the above-mentioned command cycle at the time of data transmission, and the laser output condition is changed when it deviates from the command cycle. Changes may have been commanded. In this case, since the laser oscillator cannot change the laser output condition until the next command cycle of the cycle in which the change of the laser output condition is commanded on the data received from the control device, it is delayed from the command time point. Change processing will be performed. As a result, there is still a concern that the actual laser processing region on the workpiece material includes some error (such as a positional deviation of the start point or the end point) with respect to the specified processing region. The processing error in such an actual processing region tends to increase as the laser processing speed (that is, the moving speed of the laser processing machine) increases.

  The laser processing machine described in Patent Document 1 is configured such that when the change time of the laser output condition in the laser processing program does not coincide with the data transmission command cycle, the laser processing machine does not wait for the arrival of the next command cycle and waits for the specified time. The output condition can be changed. In this laser processing machine, the time from the start of the command cycle (interpolation cycle) including the laser output condition change command to the time when the laser output condition change is commanded is calculated and obtained on the laser processing program. When the time elapses from the start of the command cycle, the laser output condition is actually commanded to be changed. Thereby, the processing error in the actual processing region due to the delay of the laser output condition changing process can be eliminated.

JP 2004-167549 A

  As described above, in order to perform high-precision processing in a laser processing machine, the laser processing machine continues to switch or change various output conditions such as emission, stop, peak power, and frequency of laser light. Even during operation, it is required to execute accurately at the target position. However, in the conventional laser processing system, a processing error tends to occur in the actual processing region due to a time difference related to data transfer with respect to each of the axis driving unit and the laser oscillator. The processing error due to such a time difference in data transfer has not been a major problem in the processing speed range of conventional laser processing machines. However, due to improvements in laser processing technology and servo technology in recent years, As a result, the problem of deterioration in machining accuracy due to the above factors has become apparent.

  In order to reduce the processing error due to the time difference of data transfer, shorten the data transfer cycle or increase the transfer speed at each interface of the control device connected to the axis drive unit and laser oscillator respectively. This is effective, but this measure tends to increase the cost of system construction. Further, the technique described in Patent Document 1 described above can be used at a specified time without waiting for the next command cycle to arrive when the change time of the laser output condition in the laser processing program does not coincide with the command cycle of data transmission. Although the laser output condition can be changed, this technique cannot solve the problem of the time difference of data transfer due to the difference in the interface of the control device.

  An object of the present invention is to provide an axial drive unit in a laser processing system including a control unit that controls both an axis drive unit that drives a control axis of a laser beam machine and a laser oscillator that supplies laser light to the laser beam machine. Another object of the present invention is to provide a laser processing system that can eliminate the processing error caused by the time difference in data transfer with respect to each of the laser oscillators, can perform highly accurate laser processing, and can be constructed at low cost.

  In order to achieve the above object, the invention described in claim 1 is directed to a laser beam machine capable of operating along a unique control axis, a shaft drive unit for driving the control axis of the laser beam machine, and a laser beam machine. In a laser processing system comprising a laser oscillator for supplying laser light, a shaft drive unit and a control device for controlling the laser oscillator, a shaft drive unit and a laser for connecting the shaft drive unit and the laser oscillator to the control device A transfer line common to the oscillator is provided, and the control device creates a data creation unit that creates movement data to be commanded to the axis drive unit and laser output condition data to be commanded to the laser oscillator from a given laser processing program, and data creation The movement data and laser output condition data created by the unit in accordance with the communication data format common to the shaft drive unit and the laser oscillator A data conversion unit for converting the condition data into serial data described in time series, and a serial command obtained by the data conversion unit, a predetermined command common to the movement data and laser output condition data included in the serial data There is provided a laser processing system characterized by comprising a data transmission unit for sending to a transfer line in a cycle.

  According to a second aspect of the present invention, in the laser processing system according to the first aspect, the control device further includes a signal generation unit that generates a synchronization signal indicating a transmission timing of serial data according to the command cycle, and the data transmission The unit provides a laser processing system that sends serial data to a transfer line in accordance with the synchronization signal generated by the signal generation unit.

  According to a third aspect of the present invention, in the laser processing system according to the first aspect, the plurality of shaft driving units and the shaft driving units of the plurality of groups to which the plurality of shaft driving units are allocated are connected to the control device. The control device provides a laser processing system including a plurality of data transmission units that transmit serial data to the plurality of transfer lines synchronously at a predetermined command cycle.

  According to a fourth aspect of the present invention, in the laser processing system according to the third aspect, the control device further includes a signal generation unit that generates a synchronization signal indicating a transmission timing of serial data according to the command cycle, The data transmission unit provides a laser processing system that transmits serial data to a plurality of transfer lines in synchronization with each other according to a common synchronization signal generated by the signal generation unit.

  According to a fifth aspect of the present invention, in the laser processing system according to any one of the first to fourth aspects, the data creating unit deviates the laser output condition data included in the serial data from the command cycle, and the laser oscillator A laser processing system is provided in which command timing data for commanding is generated, and a data converter converts the laser output condition data to serial data by adding the command timing data to the laser output condition data.

  A sixth aspect of the present invention is the laser processing system according to any one of the first to fifth aspects, wherein the transfer line connects the shaft driving unit and the laser oscillator to the control device in a daisy chain manner. Provide a processing system.

  According to the first aspect of the present invention, the interface of the control device for the shaft drive unit and the laser oscillator is made common by connecting the shaft drive unit and the laser oscillator to the control device by a common transfer line. In addition, serial data including movement data and laser output condition data converted using a communication data format common to the shaft drive unit and the laser oscillator is converted into a predetermined command cycle common to the movement data and laser output condition data. Therefore, the time difference of data transfer with respect to each of the axis drive unit and the laser oscillator is reduced as much as possible and substantially disappears. As a result, machining errors due to data transfer time differences are substantially eliminated, and high-precision laser machining can be performed.

  According to the second aspect of the present invention, the data transmission unit can accurately transmit the serial data to the transfer line at a predetermined command cycle according to the synchronization signal.

  According to the third aspect of the present invention, the number of shaft driving units connected to the control device can be increased without increasing the transfer speed at the interface of the control device, and as a result, the laser having a large number of control axes. The processing machine can perform high-precision laser processing with various operations.

  According to the fourth aspect of the present invention, the data transmission unit can accurately transmit serial data to a plurality of transfer lines at a predetermined command cycle according to a common synchronization signal. Operation can be secured.

  According to the invention described in claim 5, the laser oscillator can change the laser output condition after waiting for the time indicated by the command timing data. As a result, the laser output condition can be changed at a desired time regardless of the serial data command cycle, and the processing error due to the delay of the change process can be eliminated.

  According to the sixth aspect of the present invention, the shaft drive unit and the laser oscillator are connected to the control device in a daisy chain manner by the transfer line, thereby further sharing the interface of the control device with respect to the shaft drive unit and the laser oscillator. Can be promoted.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Corresponding components are denoted by common reference symbols throughout the drawings.
FIG. 1 shows one aspect of a basic configuration of a laser processing system 10 according to the present invention. The laser processing system 10 includes a laser processing machine 12 that can operate along a specific control axis, an axis drive unit 14 that drives the control axis of the laser processing machine 12, and a laser oscillator that supplies laser light to the laser processing machine 12. 16, a control device 18 that controls the shaft driving unit 14 and the laser oscillator 16, and a transfer line 20 that connects the shaft driving unit 14 and the laser oscillator 16 to the control device 18 in a daisy chain manner. The control device 18 created from the given laser processing program 22 by the data creation unit 24 and the data creation unit 24 that create the movement data commanded to the axis drive unit 14 and the laser output condition data commanded to the laser oscillator 16. A data conversion unit 26 for converting the movement data and the laser output condition data into serial data in which the movement data and the laser output condition data are described in time series in accordance with a communication data format common to the shaft drive unit 14 and the laser oscillator 16; And a data transmission unit 28 for sending the serial data obtained by the data conversion unit 26 to the transfer line 20 at a predetermined command cycle common to the movement data and the laser output condition data included in the serial data.

  According to the laser processing system 10 having the above-described configuration, the shaft driving unit 14 and the laser oscillator 16 are connected to the control device 18 in a daisy chain manner by the transfer line 20, thereby controlling the shaft driving unit 14 and the laser oscillator 16. Eighteen interfaces can be shared. Furthermore, serial data including movement data and laser output condition data converted using a communication data format common to the shaft drive unit 14 and the laser oscillator 16 is transmitted at a predetermined command cycle common to the movement data and laser output condition data. Since the data is sent to the transfer line 20, the time difference of data transfer with respect to each of the axis drive unit 14 and the laser oscillator 16 is reduced as much as possible and substantially disappears.

  The shaft drive unit 14 and the laser oscillator 16 sequentially acquire necessary movement data and laser output condition data from the serial data sent to the transfer line 20 in the order of connection in the transfer line 20. At this time, since the serial data is sent in a command cycle common to the movement data and the laser output condition data, the serial data sent in one command cycle is transferred to the shaft drive unit 14 before data transfer in the next cycle is started. And the laser oscillator 16. Therefore, even if the axis drive unit 14 and the laser oscillator 16 operate at the same time as obtaining the required data, the data transfer time difference between them decreases to a level that falls within one command cycle (for example, interpolation cycle in numerical control). Therefore, the operations of the shaft driving unit 14 and the laser oscillator 16 can be substantially synchronized. As a result, machining errors due to data transfer time differences are substantially eliminated, and high-precision laser machining can be performed.

  Alternatively, if each of the axis drive unit 14 and the laser oscillator 16 obtains necessary data and then waits for the start of data transfer in the next command cycle and operates with the start of the next cycle as a trigger, The time difference in data transfer disappears, and the operations of the axis drive unit 14 and the laser oscillator 16 can be accurately synchronized. As a result, laser processing with higher accuracy can be performed. Further, in the present invention, the means for substantially eliminating the time difference of data transfer does not shorten the transfer period or increase the transfer speed in the interface of the control device, but is standard for one interface. Since the command cycle can be applied, the fear that the system construction cost will rise is also eliminated. In the configuration shown in the figure, it goes without saying that the connection order of the shaft driving unit 14 and the laser oscillator 16 in the transfer line 20 may be reversed.

  FIG. 2 is a functional block diagram showing a software configuration of the laser processing system 30 according to the first embodiment of the present invention having the above basic configuration. FIG. 3 shows an outline of the hardware configuration of the laser processing system 30. In the laser processing system 30 according to the present embodiment, constituent elements corresponding to the constituent elements of the laser processing system 10 of FIG.

  As an example, the laser processing system 30 has a configuration in which desired laser processing is performed on the workpiece W by the laser processing machine 12 operating under numerical control in an orthogonal three-axis coordinate system. As shown in FIG. 2, the control device 18 of the laser processing system 30 includes a program analysis unit 32 and a data generation / distribution unit 34 as components corresponding to the data creation unit 24 described above. The program analysis unit 32 analyzes the laser processing program 22 including movement data for a plurality of control axes (X axis, Y axis, Z axis) of the laser processing machine 12 and laser output condition data for the laser oscillator 16, and the analysis result Based on the above, the data generation / distribution unit 34 creates a movement command and a laser output command in a form delimited by a predetermined command cycle (that is, an interpolation cycle of numerical control), and distributes it to the data conversion unit 26 as interpolation command data To do.

  The data conversion unit 26 converts the distributed interpolation command data into the serial data described above, and the data transmission unit 28 sends the serial data to the transfer line 20 at a predetermined command cycle. Here, the control device 18 further includes a signal generation unit (that is, a clock) 36 that generates a synchronization signal representing the transmission timing of serial data according to the command cycle. Therefore, the data transmission unit 28 sends serial data to the transfer line 20 in accordance with the synchronization signal generated by the signal generation unit 36.

  The servo amplifiers 38, 40, 42 and the laser oscillator 16 of each axis constituting the axis driving unit 14 described above are connected in a daisy chain manner to the data transmission unit 28 of the control device 18 via the transfer line 20. . Here, in the configuration shown in FIGS. 2 and 3, first, the X-axis servo amplifier 38 transmits the movement data necessary for operating the X-axis servo motor 44 from the serial data transferred from the data transmission unit 28. Then, the serial data is transferred as it is to the next connected device (Y-axis servo amplifier 40). Similarly, the Y-axis servo amplifier 40 obtains movement data necessary for operating the Y-axis servo motor 46 from the serial data, and transfers the serial data to the next connected device (Z-axis servo amplifier 42). Similarly, the Z-axis servo amplifier 42 obtains movement data necessary for operating the Z-axis servo motor 48 from the serial data, and transfers the serial data to the next connected device (laser oscillator 16). The laser oscillator 16 acquires the laser output condition data necessary for the oscillation operation from the serial data transferred from the Z-axis servo amplifier 42, and transfers the serial data to the next connected device (if present).

  As shown in FIG. 3, the control device 18 has a hardware configuration of a numerical control device (CNC), and includes a processor (CPU) 50, a ROM 54 and a RAM 56 connected to the processor 50 via a bus 52, and a backup power source. A non-volatile memory 58 made of CMOSRAM, an input / output interface 60, and an MDI (manual input means) 62 with a display device (CRT, liquid crystal or the like). The ROM 54 stores a system program for controlling the entire laser processing system 30, and the nonvolatile memory 58 is created using an MDI 62 with a display device or input via an input interface (not shown). The NC machining program to be executed is stored. The RAM 56 is used for temporarily storing data during various processes. The input / output interface 60 is connected to the X-axis servo amplifier 38, the Y-axis servo amplifier 40, the Z-axis servo amplifier 42, and the laser oscillator 16 via the transfer line 20 in a daisy chain manner.

  Further, the laser processing machine 12 includes a table 64 that supports the workpiece W, and a processing head 66 and a processing nozzle 68 that irradiate the workpiece W with laser light. The laser beam machine 12 includes an X-axis servo motor 44 that drives the table 64 in the X-axis direction (left-right direction in FIG. 3), and a Y-axis servo that drives the table 64 in the Y-axis direction (vertical direction in FIG. 3). A motor 46 and a Z-axis servomotor 48 that drives the processing head 66 and the processing nozzle 68 in the Z-axis direction orthogonal to the X-axis and the Y-axis are mounted.

  The X-axis servo motor 44 is connected to the X-axis servo amplifier 38, the Y-axis servo motor 46 is connected to the Y-axis servo amplifier 40, and the Z-axis servo motor 48 is connected to the Z-axis servo amplifier 42. Each servo motor 44, 46, 48 is provided with a position speed detector (not shown) such as a pulse coder for detecting the position and speed, and the position and speed of each servo motor 44, 46, 48 correspond. Feedback is provided to the servo amplifiers 38, 40, 42. Each servo amplifier 38, 40, 42 controls the position and speed of the corresponding servo motor 44, 46, 48 based on a command from the processor 50 and a position and speed feedback signal. Furthermore, current control can be performed based on a feedback signal of a current detector (not shown). Thus, in the laser processing system 30, the servo control system is configured by the X-axis servo amplifier 38, the Y-axis servo amplifier 40, and the Z-axis servo amplifier 42. In this case, the data transmission unit 28 shown in FIG. 2 can be configured as a data transmission / reception unit that also receives a feedback signal.

  The laser oscillator 16 oscillates the laser beam 70 based on the laser output condition data included in the serial data described above. The laser beam 70 is reflected by a bending mirror 72 arranged at an appropriate position, is supplied to the processing head 66, is appropriately condensed in the processing head 66, and is irradiated to the workpiece W from the processing nozzle 68 at the tip of the head. Is done. The laser processing system 30 having such a configuration exhibits the special effects described with reference to FIG. 1 and can perform high-precision laser processing on the workpiece W.

  FIG. 4 illustrates a serial data format 74 used in the laser processing system 30. In this format 74, commands 76 for various devices (servo amplifiers 38, 40, 42, laser oscillator 16) connected in a daisy chain by the transfer line 20 are described side by side in time series. When the power is turned on, the control device 18 confirms the type and connection order of devices connected to the transfer line 20 in a daisy chain, and determines the data items in the serial data. In the above embodiment, only the servo amplifiers 38, 40, and 42 and the laser oscillator 16 are described as devices connected to the control device 18. However, peripheral devices such as I / O devices are daisy-chained to the control device 18. Chain connection is also possible. In that case, a data item corresponding to the command to the I / O device is added to the serial data.

  The daisy chain connection form of the data transfer line 20, which is a feature of the laser processing system 10 according to one aspect of the present invention, is a device that can be daisy chained by one transfer line 20 when serial data is transferred at a specific command cycle. It has an upper limit on the number. For example, the number of control axes of the laser processing machine 12 is large, and it may be difficult to daisy chain all the axis driving units 14 together with the laser oscillator 16 with one transfer line 20. In this case, the upper limit of the number of connectable devices can be increased by increasing the data transfer rate at the interface (data transmission unit 28) of the control device 18, but there is a concern that the system construction cost will increase due to this. .

  Therefore, the present invention provides a configuration in which a plurality of transfer lines 20 are installed in the control device 18 and a plurality of devices are connected to the control device 18 in a daisy chain manner through each of the transfer lines. FIG. 5 shows a laser processing system 80 according to the second embodiment of the present invention having such a configuration. The laser processing system 80 has substantially the same configuration as the laser processing system 30 of FIG. 2 except that the laser processing system 80 includes two daisy chain transfer lines 20. Accordingly, corresponding constituent elements are denoted by common reference numerals and description thereof is omitted.

  The laser processing system 80 includes a plurality of shaft drive units (servo amplifiers 82, 84, 86, and 88 and servo motors 90, 92, 94, and 96) and two groups of shaft drive units to which the shaft drive units are allocated. And two transfer lines 20 connected to the control device 18 in a daisy chain manner. The control device 18 includes two data transmission units 28A and 28B that send serial data to each of the two transfer lines 20 in synchronization with a predetermined command cycle. The data transmission units 28A and 28B send serial data to the two transfer lines 20 in synchronization with each other in accordance with the common synchronization signal generated by the signal generation unit 36.

  In the laser processing system 80 having the above-described configuration, the two data transmission units 28A and 28B use a common synchronization signal to synchronize the transfer timings of the serial data transferred through the two transfer lines 20 with each other. Can do. Thereby, it is possible to increase the number of devices connected to the control device 18 in a daisy chain manner without increasing the transfer speed at the interface of the control device 18, and as a result, in the laser processing machine 12 having a large number of control axes, High-precision laser processing can be performed with various operations.

  In the laser processing system according to the present invention, when the change time of the laser output condition in the laser processing program does not coincide with the command cycle of data transmission, the laser output condition at a specified time without waiting for the arrival of the next command cycle. It is also possible to adopt a configuration for enabling the change. In order to realize this configuration, in the laser processing system 10 shown in FIG. 1, the data creation unit 24 instructs the laser oscillator 16 to deviate the laser output condition data included in the serial data from a predetermined command cycle. Create command timing data. Then, the data conversion unit 26 converts the movement data and the laser output condition data into serial data in a state where the command timing data is attached to the laser output condition data created by the data creation unit 24.

  As illustrated in FIG. 6, when a machining nozzle for irradiating laser light moves at a constant speed in one direction, and laser beam emission (beam on) and stop (beam off) are repeated at predetermined intervals to perform slit machining ( In general, movement data and laser output condition data are created and commanded by dividing them into a predetermined command cycle (interpolation cycle) P, so that, for example, a change in laser output condition data is conventionally performed. (For example, beam-on to beam-off) can be performed only when the command cycle is switched. However, in practice, as shown in the drawing, it is often required to change data in the middle of one command cycle P1.

  Therefore, in the present invention, serial data is prepared with the above configuration in which time information from the start of the command cycle P1 for changing data to the time of data change is added to the laser output condition data as command timing data. That is, the serial data content in the command cycle P1 is that the movement command is a movement amount of one command cycle, whereas the laser output condition command includes the beam-off command and its command timing (waiting time T). . Thereby, the laser oscillator 16 can change the laser output condition after waiting for the time T indicated by the command timing data after starting the processing of the command cycle P1. As a result, it is possible to eliminate a processing error caused by a delay in changing the laser output condition.

  In place of the above configuration in which the command timing data is added to the laser output condition data, the movement amount in the movement command until the data change time in the command cycle P1 and the movement in the movement command after the data change time in the command cycle P1 It is also possible to adopt a configuration in which the ratio data with the quantity is included in the serial data and transferred to the laser oscillator 16. In this case, the laser oscillator 16 calculates the waiting time T based on the movement ratio data acquired from the serial data.

  The laser processing systems 10, 30, and 80 according to the present invention described above employ a daisy chain type transfer line 20 as one aspect of the transfer line 20 that connects the shaft driving unit 14 and the laser oscillator 16 to the control device 18. ing. However, the laser processing system according to the present invention may employ a transfer line having another connection mode such as a bus type instead of the daisy chain type transfer line 20. In this case, the transfer line only needs to have a line configuration common to both the shaft drive unit 14 and the laser oscillator 16, thereby making the interface of the control device 18 to the shaft drive unit 14 and the laser oscillator 16 common. Benefits that can be obtained. Therefore, even with such a configuration, the same effect as the laser processing apparatus 10 shown in FIG.

  Also in the above configuration employing a transfer line having a connection mode other than the daisy chain type, a plurality of transfer lines are installed in the control device 18 and a plurality of devices are connected to the control device 18 through each of the transfer lines. can do. As a result, the number of shaft driving units connected to the control device 18 can be increased without increasing the transfer speed at the interface of the control device 18, and as a result, various laser processing machines with a large number of control axes can be used. High-precision laser processing can be performed by operation.

It is a functional block diagram which shows the basic composition of the laser processing system which concerns on this invention. It is a functional block diagram which shows the software structure of the laser processing system by 1st Embodiment of this invention. It is a figure which shows the outline | summary of the hardware constitutions of the laser processing system of FIG. It is a figure which shows an example of the serial data format used with the laser processing system of FIG. It is a functional block diagram which shows the software structure of the laser processing system by 2nd Embodiment of this invention. It is a figure explaining the data change process performed with the laser processing system by the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 30, 80 Laser processing system 12 Laser processing machine 14 Axis drive part 16 Laser oscillator 18 Control apparatus 20 Transfer line 22 Laser processing program 24 Data preparation part 26 Data conversion part 28 Data transmission part 36 Signal generation part 38, 40, 42 , 82, 84, 86, 88 Servo amplifier 44, 46, 48, 90, 92, 94, 96 Servo motor

Claims (6)

A laser processing machine operable along a specific control axis, an axis driving unit for driving the control axis of the laser processing machine, a laser oscillator for supplying laser light to the laser processing machine, the axis driving unit, and In a laser processing system comprising a control device for controlling the laser oscillator,
A transfer line common to the shaft driver and the laser oscillator for connecting the shaft driver and the laser oscillator to the controller;
The controller is
From a given laser processing program, a data creation unit that creates movement data commanded to the shaft drive unit and laser output condition data commanded to the laser oscillator,
The movement data and the laser output condition data created by the data creation unit are described in time series in accordance with a communication data format common to the shaft drive unit and the laser oscillator. A data conversion unit for converting into serial data;
The serial data obtained by the data conversion unit is provided with a data transmission unit that sends the transfer data to the transfer line at a predetermined command cycle common to the movement data and the laser output condition data included in the serial data,
A laser processing system characterized by   The control device further includes a signal generation unit that generates a synchronization signal representing transmission timing of the serial data according to the command cycle, and the data transmission unit is configured to generate the serial signal according to the synchronization signal generated by the signal generation unit. The laser processing system according to claim 1, wherein data is sent to the transfer line.   A plurality of the shaft drive units; and a plurality of the transfer lines that connect the shaft drive units of the plurality of groups to which the plurality of axis drive units are distributed to the control device, and the control device includes: The laser processing system according to claim 1, further comprising a plurality of the data transmission units that transmit the serial data to the plurality of transfer lines in synchronization with the command period.   The control device further includes a signal generation unit that generates a synchronization signal representing the transmission timing of the serial data according to the command cycle, and the plurality of data transmission units include the common synchronization signal generated by the signal generation unit. The laser processing system according to claim 3, wherein the serial data is sent to the plurality of transfer lines in synchronization with each other according to a signal.   The data creation unit creates command timing data for instructing the laser oscillator to deviate the laser output condition data included in the serial data from the command cycle, and the data conversion unit includes the laser output condition The laser processing system according to claim 1, wherein the command timing data is attached to data and converted into the serial data.   The laser processing system according to claim 1, wherein the transfer line connects the shaft driving unit and the laser oscillator to the control device in a daisy chain manner.

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