tig welding

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Which is best an ac tig welder to do aluminium or dc welder.
Reply:AC.  DC can be used if you use Helium as a shielding gas, but you don't want to go there $$$."USMCPOP" First-born son: KIA  Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:if you have to ask, AC is the way to go for welding up aluminum.  If you already knew how to do aluminum with DC and helium, you wouldn't have to post please familiarize yourself with this thread, for your own sake:http://weldingweb.com/vbb/showthread.php?t=51983and these PDFs as well:http://www.millerwelds.com/resources/TIGhandbook/Last edited by Oscar; 02-13-2013 at 05:10 PM.