Squarewave DC TIG for aluminum?

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The guy at the welding supply house mentioned there is a square wave dc tig out now that handles aluminum with straight argon...is this even true and if so what machines have this technology?ThermalArc 181i | Lotos WS200
Reply:Squarewave DC ?  That's a new one on me...
Reply:DC "waves" always seem to look kinda............flat? Maybe I'm missing something.Dave J.Last edited by MinnesotaDave; 05-24-2013 at 11:46 AM.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:I'm starting to wonder how much they really know about welders and weldingThermalArc 181i | Lotos WS200
Reply:Should've asked him right then and there lol 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:Originally Posted by zeus_r6The guy at the welding supply house mentioned there is a square wave dc tig out now that handles aluminum with straight argon...is this even true and if so what machines have this technology?
Reply:Originally Posted by zeus_r6The guy at the welding supply house mentioned there is a square wave dc tig out now that handles aluminum with straight argon...is this even true and if so what machines have this technology?
Reply:Originally Posted by WeldingMachineNot totally square but all Syncrowaves feature this wave form, which is why some folks (like me) will only run Miller transformers for Alum.(Inverters are a whole other animal)
Reply:Originally Posted by WeldingMachineYes it's trueYes it works, BC had a thread a while back demonstrating it, & it looked great.Not totally square but all Syncrowaves feature this wave form, which is why some folks (like me) will only run Miller transformers for Alum.(Inverters are a whole other animal)
Reply:Originally Posted by papaharley03I can only see that being possible if they have implemented an HF signal that also performs the cleaning action for the main DC arc. That is in fact, how we deposited aluminum on top of a prior layer in semiconductor manufacturing. But the process chamber was also in a high vacuum state. Station1 was RF etch, then stations 2, 3, and 4 each deposited up to 10k angstroms of DC sputtered aluminum. The RF etch was necessary to remove ANY remaining oxide before depostion, else you'd get high contact resistance. Of course, high resistance in that context being what most would consider a short circuit on their hand held ohm meter. The gas in the chamber was Argon, but not for shielding, it was to keep the metal from being too shiny which would cause problems with pattern recognition cameras in the photolithography part of the process.Papa
Reply:Aluminum on DC with argon does not work,try it.Aluminum on DC with helium does work,no cleaning action and only works with 4043 filler.One cool thing about photolithography is that if you have much knowledge of it from the olden days(80's) you most likely know what is stripper was,and it has nothing to do with taking one clothes off or furniture.Last edited by vwguy3; 05-24-2013 at 03:34 PM.
Reply:The only thing I can think that he could refer to is Kemppi's MIX TIG.Some of the time you have AC current (which you can adjust all the parameters like balance frequency etc.) and for some time you get DC current.