What gas (mix) and wire size are you using?
both can affect burn through on lighter guage metals. 75/25 is the ARGON/CO2 gas mix I would use, CO2 burns hotter and has more splatter, so I like to use as little as possible.
As for wire, .025 seems to work well for me on sheetmetal, either "easy-grind" for non-structural or ER70S-6 for more strength.
I have a lincoln SP-175 220v welder, so it's got less draw than yours.
Ric
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Ric
2002 S-10, Daily Driver and autoX
1966 Chevelle MALIBU ( mine since 1971) Drag car converting to a track car!
Last edited by rixtrix1; 08-29-2011 at 01:08 AM.
Reason: Better info from a better source(Thanks, Greg Weld!)
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