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Re: My 54
I find that a small gap between the parts helps with the penetration but also helps with the burn through. I like to try a practice piece of metal the same thickness and get things dialed up close beforei start the actual weld. try to keep the gun angles the same, the wire stick out the same, the distance from the work the same. like joedoh says, if it is burning back increase the wire speed, if it is pushing into the weld puddle and popping and sputtering then decrease the wire speed. also, don't be afraid to increase the voltage and try it. ensure the metal is clean on both sides too, like shiny steel. contaminants can be drawn into the weld from the back side (or front side) and mimmick a voltage ot wire speed problem.
check out
welding tips and tricks
for some good info
does your welder have a chart for metal thickness and start off points for the settings? have you tried starting all over from scratch? setting and checking the gas flow etc etc?
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