one thing not mentioned is duty cycle. on a tiny machine you'll have it cranked up to max and you'll weld 1 minute in 10. then you loose all the heat out of the area yet not have enough amperage to get the puddle going before gettitng the area too hot again. I recently had to weld some 1/8" wall 2x2 tubing with a lincoln 200a tig and the duty cycle wasn't enough to finish a 2" long pass. |