I'm working with a Synchrowave 250 doing plain steel. The two work pieces are set up in a jig on the bench, and there's a footpedal for control. Overall everything seems to be fine, welds come out good and all that. However, when I finish a bead and let up off the pedal the current doesn't completely shut off immediately. It drops way down until it's barely on, but you can still see it's obviously flowing. After anywhere from one or two seconds to maybe six it finally stops. Post flow gas runs just fine.

Is this a problem with the switch in the foot pedal? It does look old. I'm using the shop's gear, so I don't know what kind of pedal it is except it has Miller on it and it's a big metal box with vents in the sides. I haven't used a Synchrowave 250 and wondered if maybe there was some control that needed to be adjusted on the machine to keep it from doing this. Thanks for any thoughts you can give me.