| 摘要 |
PURPOSE:To obtain a welded product having good quality by comparing the difference in welding current at both ends of weaving with a value preset for said difference and correcting teaching data so as to attain the preset value. CONSTITUTION:The change in welding current in the stage of weaving a welding torch to the right and left is detected with an arc sensor 10 and the output signal thereof is inputted, via an amplifier 11 and an A/D converter 12, to an arithmetic device 13. The device 13 calculates welding current IR, IL at both ends of weaving and the difference DELTAI thereof. On the other hand, the current values DELTAI1, DELTAIOTA2,...DELTAIn which assign the deviation DELTAl between the weaving center of the torch 1 and the weld line are beforehand stored in a memory 14. The device 13 compares the actual current difference DELTAI and the current value DELTAIi selected from the memory 14 and outputs only the teaching data DT in accordance with the result thereof or outputs the same after adding the signal for moving the torch 1 to the left or right to the data DT. |
