TIG tips for Aluminum

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Anyone got any?  IM new to TIG, just got my Precision TIG 185 last week.  Ive been welding steel in the past with my friend SW 175, but just started learning aluminum.  Ive got BUTT joints down pretty good, but anything harder then that, the welds turn out terrible.  I try to do fillet welds, but as soon as I get the filler close, it melts.  Im wondering if I should use a thicker filler rod.  Im just going by my slide rule:1/8" 6061 Aluminum125amps3/32 Pure Tungsten1/2" cup1/16 fillerIm gonna do some more practicing tonight, ill take pics this time.Thanks for the help,Jim
Reply:Maybe your running a little too hot..or moving the filler in and out too slowly?  But I've never tried Aluminum TIG with 1/16" filler rod before, always 1/8" or better.Common sense in an uncommon degree is what the world calls wisdom.
Reply:For me the hard part is getting the two pieces flowing together. Once I achieve that it is easy to get the joint moving along. Keep the filler low and out of the way until you have the metal molten.
Reply:I weld with 1/16 rod often. On alum. with that size filler, keep the rod back 3/4 of an inch or so, then when you get a good pool going pull the torch to the back of the pool and dip the rod in a much quicker motion than you would steel. Almost all we do is Tig .020-.050 Alum with 1/16 filler.
Reply:there are a few KEYS with aluminum,#1 clean clean clean, that means your work peice. work area. and i always take scotch brite to the filler rod #2 heat input, it takes a bit more heat to start the puddle but as soon as you do back off the pedal#3 since you got the p.t. 185 USE THE PULSE, set it for .5htz and try that !!brian