Lugnutz I know nothing about welding. But welding machines must use transformers. I don't know what the ratio of these transformers is. Lets say it's 1 to 10 or one amp in equals 10 amp out. This means that at 31 amps you have 310 amps out.

Julian Carter

1970 Triumph GT6
1967 Triumph TR4A
1952 Chevy 3600
1948 MG-TC