Aluminum MIG rules.

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I haven't MIG welded aluminum since I was in the Navy in 1996.  Since then I've immersed myself in steel and got my field cert for Dual shield finally.  However, I just got myself a weld test for Friday doing aluminum MIG for way better pay and I can't remember for the life of me what you are supposed to set your machine to.  I'm going to be doing structural work building aluminum boats.  So I know it will be AC high but what kind of heat should I start with?  And the gas is around 20 CPH I believe.
Reply:MIG aluminum........DC+ electrode, 35 CFH of pure argon, Forehand (push) ONLY.Help?Real world weldin.  When I grow up I want to be a tig weldor.
Reply:(Ooops.)http://www.naturesongs.com/cricket1.wavhttp://www.naturesongs.com/tree.wavLast edited by tanglediver; 01-02-2008 at 09:33 PM.City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:Originally Posted by David RMIG aluminum........DC+ electrode, 35 CFH of pure argon, Forehand (push) ONLY.Help?
Reply:You must have been remembering TIG welding with aluminum, which uses AC, electrode negative and high frequency.MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:Originally Posted by DesertRider33You must have been remembering TIG welding with aluminum, which uses AC, electrode negative and high frequency.
Reply:I should have said torch on the negative powersupply terminal, sorry.MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:Not necessary, just hope you're ok with corrections.  JohnSMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:Originally Posted by Tack_Square_Tack  A deck drain I installed on the USS Spruance 10 years ago should still be there looking good.  Thanks
Reply:number 1.  how did you happen to know that??number 2.  I wouldn't trust anything on wikipedia.
Reply:Originally Posted by Fabc8tornumber 1.  how did you happen to know that??number 2.  I wouldn't trust anything on wikipedia.
Reply:Originally Posted by weldgaultNot necessary, just hope you're ok with corrections.  John