Robot system and operating method thereof

A robot system comprising:

• a robot that self-travels along a traveling shaft and has an arm provided with a position detection sensor at a distal end;
• calibrators that are juxtaposed along the traveling shaft and each calibrator has a calibration position;
• a support structure that has reference positions juxtaposed along an extending direction of the traveling shaft, and is configured to support a workpiece;
• and
• means for controlling, wherein
• the support structure is configured to be capable of moving the workpiece relative to the calibration positions, and
• the means for controlling
• causes the robot to move by a predetermined first distance set in advance along the traveling shaft,
• operates the robot so that the position detection sensor detects the calibration positions,
• calibrates position coordinates of the robot based on position coordinates of the calibration positions detected by the position detection sensor,
• subsequently operates the robot so that the position detection sensor detects the reference positions, and
• calibrates position coordinates of the workpiece based on position coordinates of the reference positions detected by the position detection sensor.

A robot system comprising:

• a robot that self-travels along a traveling shaft and has an arm provided with a position detection sensor at a distal end;
• calibrators that are juxtaposed along the traveling shaft and each calibrator has a calibration position;
• a support structure that has reference positions juxtaposed along an extending direction of the traveling shaft, and is configured to support a workpiece, wherein the support structure is configured to be capable of moving the workpiece relative to the calibration positions;
• and
• circuitry configured to:
• cause the robot to move by a predetermined first distance set in advance along the traveling shaft,
• operate the robot so that the position detection sensor detects the calibration positions,
• calibrate position coordinates of the robot based on position coordinates of the calibration positions detected by the position detection sensor,
• subsequently operate the robot so that the position detection sensor detects the reference positions, and
• calibrate position coordinates of the workpiece based on position coordinates of the reference positions detected by the position detection sensor.