Need to understand different wave forms for A/C welding

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Been asked to do a video on a new tig welder that has 4 different wave forms for A/C.Advanced square, square, triangular and sine. Played with it for a while and found the advanced square to be the strongest.  Needed to add amps to the other three to get the same results. Can someone please explain why you would need to have different wave forms?From the desk of Kevin CaronTrying to be the best me I can!www.kevincaron.comAHP Alpha Tig 200x MillerMatic 251Miller Syncrowave 200
Reply:Here is a starter read for you:http://www.millerwelds.com/resources...trols-inverterhttp://www.thefabricator.com/article...uminum-weldingFind a few more and you'll be all set.Last edited by MinnesotaDave; 12-25-2013 at 02:05 PM.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:Never mind!!Just found it over on the Miller website....From the desk of Kevin CaronTrying to be the best me I can!www.kevincaron.comAHP Alpha Tig 200x MillerMatic 251Miller Syncrowave 200
Reply:Was just reading that!!  Thank you,   Found a couple of more over there that will help.. Originally Posted by MinnesotaDaveHere is a starter read for you:http://www.millerwelds.com/resources...trols-inverterhttp://www.thefabricator.com/article...uminum-weldingFind a few more and you'll be all set.