Multiple machines, multiple polarity, same workpiece.

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Could I expect any adverse effects to my LN-25  if welding on same workpiece with someone welding different polarity?Lincoln Electric:Ranger GXT 250SA-200LN-25Pro MiG 256Pro Mig 180Esab CV 251Invertec 160Victor Torches”
Reply:Not has long has everyone has a good machine without stray grounds. your equipment creates it own circuit just has theirs does. Just do not set your equipment on the piece you are welding.Klutch 220si mig , stick, and dc tigHobart 140 AHP ALPHA 200X 2016Lotos LTP5000DSmith O/P