This is killing me cause my Millermatic 211 arc wanders on aluminum, Using 0.035-inch 4043 wire at 20V, and welds has inconsistent patterns. How i can avoid this problem?
Wandering arc comes from bad grounding or prep, Check clamp for rust or wear, My Millermatic 211 wandered too, Use 100% argon at 25 CFH for coverage, Clean with alcohol thorough, Push wire for better control, Check spool gun tension for consistency, Use 250 ipm wire speed, Ensure clean joint fit-up, Use 2% lanthanated tungsten.
inconsistent patterns comes from dirty surfaces, Degrease with acetone thorough before welding, My Miller welds aluminum clean now, Check ground clamp condition.
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