| 摘要 |
PURPOSE:To improve a monitoring capacity by providing the detector of a welding current and storage device of a current value and by arranging the selection circuit to pull out the current value data as well, and by displaying the current waveform among optional sections after completion of the welding time. CONSTITUTION:The current detector 7 of a toroidal coil, etc., is provided on the lower part secondary arm 4 of a welding transformer 2 and the recording device 10 of a momentary welding current value, selection circuit 12, waveform display device 13, etc., are arranged in the circuit, as well. The welding current detected by the detector 7 restores its current waveform by a waveform restoring circuit 8 and is stored in a storage device 10 via A/D convertor 9. After completion of welding time, the selection circuit 12 pulls out the current value data from the storage device 10 and displays on a waveform display device 13, when an optional cycle section is designated by a setter 11. The monitoring capacity of the current waveform is improved due to the waveform being monitored in details in this way.
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