| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of time expended from contact between a welding wire and a base material to generation of arc, which is caused by wasted time of play on a feeding path and a shortened length of wire projected from a welding torch when retraction is carried out at the end of welding.SOLUTION: Welding torch moving time is compared with inching time for teaching steps in order reverse to the arrangement order of a plurality of teaching steps after retraction. A teaching step where the welding torch moving time is longer than the inching time is set as an inching start teaching step for staring inching of a welding wire 13. The timing of passage of time equal to a difference between the welding torch moving time and the inching time of the inching start teaching step from the start timing of the inching start teaching step is set as inching start timing, and inching is started when the welding torch moves from the position of a welding end point to the position of inching start timing. |
