Basic Alum Tig Question

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I had a few pieces of 1/8" alum left over and fired up a coupleof beads. The first one was near the edge with the metal cold.This is 1/8" 5053 alum and it's about 1.5" wide.125amps, 1/16" 1.5% lanthanated (I know it's small), 3/32" 4043 filler, balance set to 70% EN.When I first lit up on the edge and went about 8" it seemed to fry the base metal. It looked consistent  but fried.Some pics of the top side and how it ate the edge back about1/4" and pulled it into the bead. And some pics from the back and I hope you can see how rough the texture is. It's just scrapand I was just fooling around but I got   I moved up to the middle of the piece immediately to try and figure out what I did and laid down a very inconsistent bead but it didn't burn up and get rough like the first one even though the base metal was hotter from already running the bead on the edge.Gimme your thoughts....Yes I know I left a crater on the middle bead but I was  andwasn't worried about it at the time, nor am I now Did that happen just because I was within 3/32 or 1/4 of the edge? Attached ImagesHow do you know the blacksmith's dog? When you hollar at him he makes a bolt for the door!
Reply:Looks right to me.Try switching to 5356 filler. I does not get such a mottled look. The silicon in the 4043 is migrating to the surface.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:That's what welding on the edges does.  Prob too much heat.  Doesn't have as much area to dissipate heat as the flat bead.  If you did a butt joint, that wouldn't have happened to the edge.TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum
Reply:Typical transverse linear indications of an aluminum weld. In the rocket factory, as long as they stop before the toe of the weld, they can be buffed or sanded smooth with no ill effect to the weld. This usually occurs when the weld is hot and autogenous or the filler metal was added to the puddle at a consistent rate.Two turn tables and a microphone.
Reply:Sorry original post should've said the base metal was 6061How do you know the blacksmith's dog? When you hollar at him he makes a bolt for the door!