It has always been set up as MIG. My buddy asked the same thing when I ran the question past him. I don't know 100% certain that the polarity is correct, I will check it when I head back over to the shop (hopefully today). I'm also going to check the diodes. I'll post up the results when I get them checked out.Check the polarity of the work leads. Flux core or MIG?
Hmmm... Always welded this way? Always welded different from any other MIG used? I'd definitely check the polarity. Could have "always" been set wrong...It has always been set up as MIG....I'm thinking that this is just the way the welder works at this point based on the descriptions of a bad diode. My friend who I bought it from did mention that it welds differently than other MIG welders he has used.