JPH06285747A - Original point setting method for composite work machine and corrected value setting method to correct position coordinate - Google Patents

Abstract

PURPOSE:To allow a machining program for each work machine to be conveniently made up with a common coordinate system and a machining position of each work machine to be set without the need for teaching. CONSTITUTION:A laser beam nozzle 25 is located at a predefined coordinate position and laser beam is emitted from the laser beam nozzle 25 in a static condition to a vertical or horizontal direction. The machining heads of other work machines 5, 7 are moved toward the coordinate axis to search the laser beam with light receiving elements 51, 53 provided on the machining heads. From a relation ship between the position coordinate values of the machining heads of other work machines 5, 7 after detecting the laser beam and the position coordinate value at the predefined coordinate position of the laser work machine 3, the original point of the laser work machine 3 is set in common with the original point of other work machines 5, 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an origin position setting method and a position coordinate correction value setting method for a multi-task machine.
More specifically, the origin of a multi-tasking machine having a plurality of processing machines, each processing machine being able to move in the coordinate axis direction in its own coordinate system, and a machining head having a machining head for mounting a punch and a die. The present invention relates to a position setting method and a correction value setting method for position coordinate correction.

[0002]

2. Description of the Related Art There is a known composite processing machine which has a plurality of processing devices each having a processing head movable in the coordinate axis direction and which processes the same material by the processing heads of the respective processing devices to produce a product. For example, there is a multi-tasking machine for multi-tasking sheet metal processing having a three-dimensional laser processing apparatus and a multi-axis plate material processing robot.

In the multi-tasking machine as described above, since the machining heads of the respective machining devices are guided by the individual guide rails and move in the respective coordinate axis directions, each machining device has its own coordinate system. The origin position and the position coordinate value are individual in each processing device.

Therefore, the machining program of each machining device cannot be created in a common coordinate system, and the machining position of the machining head of each machining device is set by teaching for each machining device. ing.

[0005]

The setting of the machining position by teaching is tedious, requires experience, and requires teaching again each time the machining content is changed, which is not efficient. For this reason, it is not suitable for high-mix low-volume production, and causes a decrease in the operating rate of expensive multi-tasking machines. The present invention has been made by paying attention to the above problems.
An origin position setting method for a multi-tasking machine, which enables a machining program of each machining device to be simply created with a common coordinate system and allows the machining position of each machining device to be set without teaching. It is an object to provide a correction value setting method for position coordinate correction.

[0006]

According to the present invention, the above-described object is to provide a machining head having a plurality of machining devices, each of which is movable in the coordinate axis direction in its own coordinate system. In the method of setting the origin position between the processing devices of the multi-tasking machine, the processing head of one processing device is positioned at a predefined coordinate position, and the directivity in the vertical direction or the horizontal direction from the processing head in a stationary state. Radiating a light beam having, and moving the processing head of the other processing device in the coordinate axis direction to search for the light beam by the light sensing means provided in the processing head, and processing of the other processing device detecting the light beam. From the relationship between the position coordinate value of the head and the position coordinate value of the machining head of the machining head of the one machining device at the predefined coordinate position, the origin position of the one machining device and the origin position of the other machining device The origin position setting method of the multi-tasking machine is characterized in that and are used in common to set the origin position, and it has a plurality of processing devices, and each processing device can move in the coordinate axis direction with its own coordinate system. In the correction value setting method for position coordinate correction of the multi-tasking machine with various machining heads,
The processing head of one processing device is positioned at each of the two predefined coordinate positions, and in the stationary state, the processing head emits a directional light beam in the vertical or horizontal direction, and the processing device of the other processing device is processed. The heads are respectively positioned at two predefined coordinate positions, and the light rays are detected at the respective coordinate positions by the light sensing means provided on the processing head, and the light rays are detected by the mutual difference of the detected light amounts at the respective coordinate positions. Measuring a deviation between the coordinate axis direction of one processing apparatus and the coordinate axis direction of the other processing apparatus, and setting a correction value for correcting the position coordinate value so that the position coordinates of each processing apparatus match based on this deviation. Is achieved by the correction value setting method for position coordinate correction of the multi-function machine.

[0007]

According to the above-described structure, the processing head of one processing apparatus emits a light beam having directivity in the vertical direction or the horizontal direction at a predetermined coordinate position such as the origin position, and under this state. When the processing head of the other processing device moves in the coordinate axis direction, the light sensing means provided in the processing head searches for the light beam in a scanning manner, and the light sensing means detects the light beam to detect the light beam. The origin position of the other machining device is determined by the relative relationship between the position coordinate value of the machining head of the other machining device at the position and the position coordinate value of the machining head of the one machining device at the predefined coordinate position. It is set in a logically common manner based on the origin position of the one processing device.

Further, the machining head of one machining apparatus emits light rays having directivity in the vertical direction or the horizontal direction at two predefined coordinate positions, and the machining heads of other machining apparatuses are defined in advance. To another two coordinate positions, and at each coordinate position, the light sensing means provided in the processing head of the other processing device detects the light beam, and the above-mentioned one is detected by the mutual difference in the detected light amount at each coordinate position. A deviation (deviation) in the coordinate axis direction of the other processing device with respect to the coordinate axis direction of one processing device is measured, and based on this deviation, the correction value of the position coordinate value is adjusted so that the physical position coordinates of each processing device match each other. Is set.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 3 show an example of the structure of a multi-tasking machine used for carrying out the origin position setting method and the position coordinate correction correction value setting method according to the present invention.

This multi-tasking machine is a dome-shaped shelter 1
The three-dimensional laser processing device 3 and a pair of left and right bending robots 5 and 7 are provided inside the shelter 1.

The three-dimensional laser processing apparatus 3 has an X-axis cross slider 11 which is bridged between the left and right ceiling rails 9 and is guided by the ceiling rails 9 and is movable in the X-axis direction (X1).
A Y-axis carriage 15 supported by the X-axis cross slider 11 and guided by a Y-axis guide rail 13 provided on the X-axis cross slider 11 and movable in the Y-axis direction (Y1);
A Z-axis slider 19 supported by the Y-axis carriage 15 and movable in the Z-axis direction (Z1) by being guided by the Z-axis guide portion 17 of the Y-axis carriage 15, and a vertical axis attached to the lower end of the Z-axis slider 19. It has a three-dimensional moving structure including an A-axis rotating arm 21 that can rotate around and a B-axis rotating arm 23 that is attached to the tip of the A-axis rotating arm 21 and can rotate around a horizontal axis. A laser beam nozzle 25, which is a processing head, is attached to the tip of the arm 23.

A laser beam such as a He-Ne laser is applied to the laser beam nozzle 25 from a laser oscillator (not shown), and the B-axis rotating arm 19 rotates to cause a vertical direction, a horizontal direction, or an arbitrary inclination angle. The laser beam is directionally emitted in the direction.

The bending robot 5 on the right side has an X-axis slider 29 which is guided by a guide rail 27 and movable in the X-axis direction (X2), and a Z-axis guide portion of the X-axis slider 29 which is supported by the X-axis slider 29. 31 guided in the Z-axis direction (Z
2) Z-axis slider 33 and Z-axis slider 3
3 and a robot arm unit 37 which is guided by the Y-axis guide portion 35 of the Z-axis slider 33 and is movable in the Y-axis direction (Y2). The arm tip (machining head) has a tool such as a bending die. Can be replaced.

The bending robot 7 on the left side has substantially the same structure as the bending robot 5 on the right side, and is guided by the guide rail 39 to be movable in the X-axis direction (X3) in the X-axis slider 41. A Z-axis slider 45 supported by the X-axis slider 41 and movable in the Z-axis direction (Z3) by being guided by the Z-axis guide portion 43 of the X-axis slider 41; and a Z-axis slider 45 supported by the Z-axis slider 45. And a robot arm unit 49 that is movable in the Y-axis direction (Y3) by being guided by the Y-axis guide portion 47, and a tool such as a bending die is replaceably attached to the arm tip (machining head).

In this case, moving bodies such as carriages and sliders of the three-dimensional laser processing apparatus 3, the left and right bending robots 5 and 7, are guided and moved by their own guide rails and guide portions, so that they are strict. In FIG. 3, the three-dimensional laser processing apparatus 3 and the left and right bending robots 5 and 7 are designated by reference numerals X1, Y1, Z1 and X2, Y2, Z2 and X3, Y3, respectively.
As indicated by Z3, each coordinate system has its own coordinate system, and the origin position exists in each coordinate system.

A measuring jig (not shown) having a light receiving element is positioned and mounted in place of the tool at the tool mounting portion at the tip of each of the robot arm units 37 and 49 of the left and right bending robots 5 and 7. Light-receiving elements 51 and 53 are positioned and attached to the tip ends of the robot arm units 37 and 49, respectively. Each of the light receiving elements 51 and 53 is sensitive to the laser beam emitted from the laser beam nozzle 25 and generates a quantitative electric signal that increases with an increase in the amount of received light. Each of the light receiving elements 51 and 53 is provided in the X-axis direction and the Y-axis direction, or can be swung between the X-axis direction and the Y-axis direction. Laser beam nozzle 25 than any other direction
It is designed to be sensitive to the emitted laser beam.

A workpiece transfer guide rail 55 extends in the X axis direction at the center between the guide rails 27 and 39 in the Y axis direction, and a traveling carriage 57 is engaged with the workpiece transfer guide rail 55. There is. The traveling carriage 57 is provided so as to be capable of traveling in the X-axis direction by being guided by the work transfer guide rail 55, and has a work part support portion 59 for supporting the plate-shaped work W in a vertical posture or a horizontal posture so as to be reversible. Have

FIG. 4 shows a control system of a multi-tasking machine used for carrying out the origin position setting method and the position coordinate value correction method between the respective processing devices according to the present invention. This control system includes a three-dimensional laser processing device 3 and left and right bending robots 5 and 7.
NC devices 61, 63, and 65 for each of the above. In FIG. 2, reference numeral 67 indicates these NC devices 61,
The common cabinet of 63 and 65 is shown.

The NC device 61 of the laser processing device 3 outputs a shaft drive command to the shaft drive part 69 of each part of the laser processing device 3 in accordance with a processing program, an origin position setting program, and a position coordinate value correction program, and a laser output control part. 7
The laser output command is output to 1.

NC device 63 of the bending robot 5 on the right side
Is a machining program or origin position setting program,
Bending robot 5 according to the position coordinate value correction program
The axis drive command is output to the axis drive unit 73 of each unit of.

NC device 65 of the left bending robot 7
Is a machining program or origin position setting program,
Bending robot 7 according to the position coordinate value correction program
The axis drive command is output to the axis drive unit 75 of each unit.

The light receiving element 51 of the bending robot 5 is connected to the maximum light receiving amount detection unit 77, and the maximum light receiving amount detection unit 77 is connected.
Detects the peak of the electric signal from the light receiving element 51 and outputs the peak detection signal to the NC device 63. Further, a light receiving amount signal memory unit 79 is connected to the maximum light receiving amount detecting unit 77,
The received light amount signal memory unit 79 stores the electric signal value from the light receiving element 51 at the peak in peak detection, that is, the signal indicating the received light amount (received light amount signal).

The received light amount signal memory unit 79 is configured to store two received light amount signals.
The two received light amount signals stored by are output to the comparison unit 81, the comparison unit 81 calculates the relative difference amount between the two received light amount signals, and outputs the calculation result to the NC device 63.

The light receiving element 53 of the bending robot 7 is connected to the maximum light receiving amount detecting section 83, and the maximum light receiving amount detecting section 8 is connected.
3 detects the peak of the electric signal from the light receiving element 53,
The peak detection signal is output to the NC device 65. Further, a light reception amount signal memory unit 85 is connected to the maximum light reception amount detection unit 83, and the light reception amount signal memory unit 85 receives an electric signal value from the light receiving element 53 at the peak in peak detection, that is, a signal indicating the light reception amount (light reception amount). Signal).

The received light amount signal memory unit 85 is configured to store two received light amount signals, and outputs the two stored received light amount signals to the comparison unit 87. The comparison unit 87 calculates the relative difference amount between the two received light amount signals, and the calculated result is NC.
Output to the device 65.

Next, a procedure for carrying out the origin position setting method in the above-mentioned configuration will be described.

First, the X-axis cross slider 11, the Y-axis carriage 15, and the Z of the laser processing apparatus 3 by the axis drive unit 69.
By controlling the axes of the axis slider 19, the A-axis rotary arm 21, and the B-axis rotary arm 23, the laser beam nozzle 25 of the laser processing apparatus 3 is moved to a predetermined coordinate position, for example, X axis.
The laser beam is emitted from the laser beam nozzle 25 in a stationary state at the origin position in which the origin position is restored in the 1-axis direction, the Y1-axis direction, the Z1-axis direction, the A-axis direction, and the B-axis direction. This laser beam is emitted in the Z-axis direction, that is, in the vertical direction at the origin position of the laser processing device 3, and forms a vertical origin position index line by the laser light.

Next, the robot arm unit 37 of the bending robot 5 is moved at a constant speed in the X2 axis direction by the axis control of the X-axis slider 29 of the bending robot 5 on the right side by the shaft drive unit 73, and during this constant speed movement. Then, at each coordinate position in the X2 axis direction, the light receiving amount signal generated by the light receiving element 51 oriented in the Y axis direction reaches a peak, in other words, the light receiving element 51 of the robot arm unit 37 emits laser light in the X2 axis direction. The maximum light receiving amount detection unit 77 detects that the position is completely aligned with the vertical origin position index line, and thereby outputs a peak detection signal to the NC device 63.

The NC device 63 inputs the above-mentioned peak detection signal to set the origin position of the bending robot 5 in the X2 axis direction to the current X2 of the robot arm unit 37.
Set based on the position coordinate value in the axial direction. The origin position in the X2 axis direction of the robot arm unit 37 set in this way is equal to the origin position in the X1 axis direction of the laser processing apparatus 3, and both are logical, that is, the laser processing apparatus 3 and the bending robot 5 Are common to each machining program.

Next, the robot arm unit 37 of the bending robot 5 is controlled by controlling the axis of the robot arm unit 37 of the bending robot 5 on the right side by the axis driving unit 73.
Is moved in the Y2 axis direction at a constant speed, and the received light amount signal generated by the light receiving element 51 oriented in the X axis direction at each coordinate position in the Y2 axis direction peaks during this constant speed movement, in other words, the robot. The maximum light receiving amount detection unit 77 detects that the light receiving element 51 of the arm unit 37 is located at a position perfectly aligned with the vertical origin position index line by the laser light in the Y2 axis direction. Output to the device 63.

The NC device 63 inputs the above-mentioned peak detection signal to set the origin position of the bending robot 5 in the Y2 axis direction to the current Y2 of the robot arm unit 37.
Set based on the position coordinate value in the axial direction. The origin position in the Y2 axis direction of the robot arm unit 37 set in this way is equal to the origin position in the Y1 axis direction of the laser processing apparatus 3, both of which are logical, that is, the laser processing apparatus 3 and the bending robot 5 Are common to each machining program.

Next, the laser processing apparatus 3 using the shaft driving unit 69.
By controlling the axis of the B-axis rotating arm 23, the laser beam nozzle 25 of the laser processing apparatus 3 is rotated 90 degrees, and the laser beam is emitted from the laser beam nozzle 25 in a stationary state. This laser beam is radiated horizontally in the Y-axis direction at the origin position of the laser processing device 3 and forms a horizontal origin position index line by the laser light.

Next, the Z-axis slider 33 of the bending robot 5 is moved at a constant speed in the Z2 axis direction by the axis control of the robot arm unit 37 of the right bending robot 5 by the axis drive unit 73, and this constant speed movement is performed. That is, that is, at each coordinate position in the Z2 axis direction, the light receiving amount signal generated by the light receiving element 51 oriented in the X axis direction reaches a peak, in other words, the light receiving element 51 of the robot arm unit 37 causes the laser beam in the Z2 axis direction. The maximum light receiving amount detection unit 77 detects that the position is completely aligned with the horizontal origin position index line by light in the vertical direction, and outputs a peak detection signal to the NC device 63.

The NC device 63 inputs the above-mentioned peak detection signal to set the origin position of the bending robot 5 in the Z2 axis direction to the current Z2 of the robot arm unit 37.
Set based on the position coordinate value in the axial direction. The origin position in the Z2 axis direction of the robot arm unit 37 set in this way is equal to the origin position in the Z1 axis direction of the laser processing apparatus 3, and both are logical, that is, the laser processing apparatus 3 and the bending robot 5 Are common to each machining program.

The X3 axis direction of the bending robot 7 on the left side,
The respective origin positions in the Y3 axis direction and the Z3 axis direction are also set on the basis of the origin position index line by the laser beam of the laser processing device 3, similarly to the origin position setting in the bending robot 5 on the right side.

Next, a procedure for carrying out the correction value setting method for position coordinate correction in the above-mentioned configuration will be described taking the Y axis as an example.

First, the axis control of the Y-axis carriage 15 of the laser processing apparatus 3 by the axis drive unit 69 causes the laser beam nozzle 25 of the laser processing apparatus 3 to have a predefined first coordinate position, for example, the origin in the Y1 axis direction. The laser beam nozzle 2 is returned to the original position and at the rest position at this origin position.
A laser beam is emitted in the vertical direction from 5.

Next, the robot arm unit 37 of the bending robot 5 is controlled by controlling the axis of the robot arm unit 37 of the bending robot 5 on the right side by the axis driving unit 73.
Is moved in the Y2 axis direction at a constant speed, and during this constant speed movement, that is, at the respective coordinate positions in the Y2 axis direction, the light reception amount signal generated by the light receiving element 51 oriented in the X axis direction reaches a peak. The light-receiving amount signal detected by the detecting unit 77 is stored in the light-receiving amount signal memory unit 79.

Next, the laser processing apparatus 3 using the shaft driving unit 69.
By the axis control of the Y-axis carriage 15, the laser beam nozzle 25 of the laser processing apparatus 3 is moved to a predefined second coordinate position, for example, the maximum movement position in the Y1 axis direction,
In the stationary state at this moving position, the laser beam is emitted from the laser beam nozzle 25 in the vertical direction.

Next, the robot arm unit 37 of the bending robot 5 is controlled by controlling the axis of the robot arm unit 37 of the bending robot 5 on the right side by the axis driving unit 73.
Is moved in the Y2 axis direction at a constant speed, and during this constant speed movement, that is, at the respective coordinate positions in the Y2 axis direction, the light reception amount signal generated by the light receiving element 51 oriented in the X axis direction reaches a peak. The light-receiving amount signal detected by the detecting unit 77 is stored in the light-receiving amount signal memory unit 79.

When the received light amount signal memory unit 79 stores the received light amount signals at the time of detecting two peaks, these two received light amount signals are output to the comparison unit 81, and the comparison unit 81 outputs the peak value of the received light amount signal at the origin position. Is calculated as a reference, and the mutual difference amount between this and the peak value of the other received light amount signal is calculated, and the calculation result is output to the NC device 63.

Next, the current position of the robot arm unit 37 of the bending robot 5 in the Y2 axis direction is maintained, and the axis of the X-axis slider 29 of the right bending robot 5 is controlled by the axis drive unit 73 based on the above calculation result. By the control, the robot arm unit 37 of the bending robot 5 is moved in the X2 axis direction until the peak value of the received light amount signal generated by the light receiving element 51 becomes equal to the peak value of the received light amount signal at the origin position.

Based on the movement amount of the robot arm unit 37 in the X2 axis direction, the deviation of the bending robot 5 in the Y2 axis direction with respect to the Y1 axis direction of the laser processing apparatus 3 is measured, and based on this deviation. A correction value (offset value) of the position coordinate value is set so that the physical position coordinates of the laser processing device 3 and the right bending robot 5 in the Y-axis direction match each other.

In the above example, the robot arm unit 37 is actually moved in the X2 axis direction to measure the deviation of the bending robot 5 in the Y2 axis direction. However, the light amount change amount characteristic with respect to the optical path distance is known. If so, the deviation can be measured by calculation.

The correction value setting for position coordinate correction as described above is performed by
Bending robot 5 on the right and bending robot 7 on the left
Similarly, the coordinate system of the bending robot 5 on the right side and the coordinate system of the bending robot 7 on the left side are set by the laser processing apparatus 3 by the correction value setting for the position coordinate correction.
It will be treated as a three-dimensional coordinate that is logically the same as the coordinate system of.

As a result, the position coordinate values in each processing program of the laser processing device 3, the right bending robot 5 and the left bending robot 7 are set in one common coordinate system, and are set between the processing programs. There is no need to perform coordinate conversion.

In the above embodiment, the laser processing apparatus 3 has an A-axis rotating mechanism and a B-axis rotating mechanism. However, if the laser processing apparatus does not have these rotating mechanisms,
Vertical light and horizontal light may be obtained by attaching a jig for refracting the laser beam by 90 degrees to the laser beam nozzle portion.

The multi-tasking machine to which the origin position setting method and the position coordinate correction correction value setting method according to the present invention are applied is
It is preferable to include a laser processing device in order to obtain a light beam having directivity, but by adding a beam emitting means of one processing device, the laser processing device is not necessarily required, and each coordinate is coordinated. It may be a combination of various other processing devices having a system.

In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0051]

As can be understood from the above description, according to the origin position setting method and the position coordinate correction correction value setting method of the multi-tasking machine according to the present invention, the machining head of one machining apparatus can be set in advance such as the origin position. A light beam having directivity is emitted at a defined coordinate position in a vertical direction or a horizontal direction, and the machining head of another machining apparatus moves in the coordinate axis direction under this state to provide light to the machining head. The sensing means scans the light beam in a scanning manner, and the light sensing means detects the light beam, whereby the position coordinate value of the machining head of the other machining device at this detection position and the machining head of the one machining device. The origin position of the other processing device is logically common with the origin position of the one processing device as a reference in relation to the position coordinate value at the previously defined coordinate position. The machining head of one machining device emits light rays having directivity in the vertical direction or the horizontal direction at two predefined coordinate positions, and the machining heads of other machining devices are predefined. To the two coordinate positions, and the light sensing means provided in the processing head of the other processing device detects the light beam at each coordinate position, and the light rays are detected by the mutual difference in the detected light amount at each coordinate position. A deviation in the coordinate axis direction of the other processing apparatus with respect to the coordinate axis direction of one processing apparatus is measured, and the correction value of the position coordinate value is set based on this deviation so that the physical position coordinates of each processing apparatus match each other. Therefore, the machining program of each machining device can be easily created in a common coordinate system, the machining position of each machining device is set without the need for teaching, and each machining device is set. Behavior change is to be conveniently carried out only by changing the machining program.
As a result, the adaptability of the multi-tasking machine to high-mix low-volume production is improved, and the operating rate of the multi-tasking machine is improved.

[Brief description of drawings]

FIG. 1 is a front view of a structure example of a multi-tasking machine used for carrying out an origin position setting method and a position coordinate correction correction value setting method according to the present invention as viewed in the X-axis direction.

FIG. 2 is a side view showing a structural example of a multi-tasking machine used for carrying out the origin position setting method and the position coordinate correction correction value setting method according to the present invention, as viewed in the Y-axis direction.

FIG. 3 is a perspective view showing a coordinate system of a multi-tasking machine used for carrying out an origin position setting method and a position coordinate correction correction value setting method according to the present invention.

FIG. 4 is a block diagram showing an embodiment of a control system of a multi-tasking machine used for carrying out the origin position setting method and the position coordinate value correction method between each processing apparatus according to the present invention.

[Explanation of symbols]

 3 Three-dimensional laser processing device 5, 7 Bending robot 25 Laser beam nozzle 37, 49 Robot arm unit 51, 53 Light receiving element 61, 63, 65 NC device 77, 83 Maximum received light amount detection part 81, 87 Comparison part

Claims (2)

[Claims] 1. A method for setting an origin position between processing devices of a multi-tasking machine having a plurality of processing devices, each processing device having a processing head movable in the coordinate axis direction in an individual coordinate system, The machining head of one machining device is positioned at a predefined coordinate position, and in the stationary state, the machining head emits a directional light beam in the vertical direction or the horizontal direction, and the machining head of the other machining device is coordinated. Direction of the machining head by searching for the light beam by the light sensing means provided in the machining head, and detecting the light beam, the position coordinate value of the machining head of the other machining device and the machining head of the one machining device in advance. It is characterized in that the origin position of the one processing device and the origin position of the other processing device are made common to set the origin position based on the relationship with the position coordinate value at the defined coordinate position. Origin position setting method of case processing machine. 2. A correction value setting method for position coordinate correction of a multi-tasking machine having a plurality of processing devices, each processing device having a processing head movable in the coordinate axis direction in a separate coordinate system. The machining heads of one machining device are respectively positioned at two predefined coordinate positions, and in a stationary state, the machining head emits a light beam having directivity in the vertical direction or the horizontal direction, and the machining heads of the other machining devices. Are respectively located at two coordinate positions defined in advance, the light rays are detected by the photo-sensing means provided in the machining head at each coordinate position, and the above-mentioned one is detected from the mutual difference of the detected light amount at each coordinate position. A deviation between the coordinate axis direction of one processing device and the coordinate axis direction of the other processing device is measured, and a correction value for correcting the position coordinate value is adjusted based on this deviation so that the position coordinates of each processing device match. Position coordinate correction correction value setting method of a composite working machine which characterized in that a constant.