Posted by Russ/Wyo on Sunday, September 14, 2003 at 10:50AM :
In Reply to: Mig Welding advice needed posted by Rick on Saturday, September 13, 2003 at 3:26PM :
The polarity of your welder using gas is usually reverse from the polarity when using flux core wire, so you should check for correct polarity. Also, when welding thin metal, use a piece of copper plate to 'back up' the materials you are welding together to help prevent burn through. I hope this helps.