Arc wonder

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Was welding some thin aluminum and I noticed at low amps the arc wound jump around a bit. What are some of the causes of that ?Will   Supports Autism Awareness                            My ToysBobCat 225 PLusMillermatic 130Miller Spectrum 300 CutmateEverlast Power Tig 185 Micro April is Autism Month .
Reply:The arc is looking for the path of least resistance. Oxidition, and unequal thicknesses add to the wandering. Try going up in hertz to constrict your arc a bit.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:Try a smaller diameter tungsten, less gas flow to "blow" it around, less stick out of the tungsten and a smaller diameter glass lens. As already mentioned "CLEAN" at the point of weld puddle.Think of a garden hose with a spray nozzle and too much PSI on the hose..... Direct the flow and have the correct amount of flow.Lincoln SA200's... at least 15 - 20. They come and go. Growing partial to the "Short Hoods" in my old age. Last count on Short Hoods was 13 in possession.
Reply:Originally Posted by shovelonThe arc is looking for the path of least resistance. Oxidition, and unequal thicknesses add to the wandering. Try going up in hertz to constrict your arc a bit.