| 摘要 |
PURPOSE:To prevent the generation of the dislocation due to a slippage, etc. and to reduce the welding cost with maintaining the welding accuracy by providing a check point at intervals in order in the longitudinal direction and detecting it by the detector located on the welding truck traveling on a rail. CONSTITUTION:When as welding truck 22 comes to a checking point C1, a detector 26 detects the piece 21 of the check point C1, transmitting a check point detection signal to a main control device 30. According to the progress of the welding truck 22, a pulse encoder 25 transmits the information of the sampling point of Z axis in order to the main control device 30. In case of performing a finishing welding, then, a reproduction motion is started by releasing as reproduction data fixing motion in case of the taken up data and the check point information of the finishing welding time being not coincided. In this way, the welding cost can be reduced without reducing the welding accuracy.
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