My miller 135 is relatively new it has just sat around while Ive used my lincoln, but one day I went to use it and upon pulling the trigger nothing was wrong at all but when I stopped and pulled the trigger again the voltage flow to the wire feeding motor drops and eventually goes to zero. I Took the unit apart and measure the voltage with a DMM and saw that after the first pull of the trigger each pull drops about 20%. I checked the voltage back to the capacitor and that is charging and discharging properly but it seems like the source off the board might be at fault? Im currently pursuing a career as an electrical engineer so I was able to make it as far to say that each trigger pull drops the voltage at the wire feed motor by atleast 20%.
Has anyone else had this problem or heard of it? Any help is appreciated