I have an older model miller 130 auto arc welder. It worked fine a few years ago but has been setting. When I hooked it up it welded but the gas valve stayed on and the wire is staying energized. Everything including the spot and pulse weld work fine. If I unplug the small wires going from the circut board to the diodes it stops the wire from being energized. The board has two small relays made onto the board and when I turn the power on one relay comes on regaurdless of what I do. The other relay comes on when I pull the trigger. Could the Pot. for the burnback be causing this?
发表于 2021-8-31 23:59:37