Undercutting with TIG

admin

I tried to weld  3/8 X 5 X 2 cupons today in the T.  Welds looked really good, but I had undercutting on both sides of the weld.  TA 185, DC Straight polarity,  185 amps, 90 background, 60%, 1 Hz give or take.  1/8 2% tungston, #6 gas cup 15 to 20 cfh.Any suggestions?I thought under cut was operator error not waiting for the rod (stick) to fill the edge.  did I not use enough filler?Sorry, no pics today, but I did get a new used digital camera.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:More filler!!! More filler!!!Look at the puddle as you go..Front..Rear..InBetween.. Try to keep everything even..Look at the "ramp" of your "dip"..You will get it in time..Practice my son......zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:That's an awefully big tungsten. I'd probably stay with 3/32...but I guess that's preference. To me, the amps seem high, I would have started around 150 or 160.John -  fabricator extraordinaire, car nut!-  bleeding Miller blue! http://www.weldfabzone.com
Reply:you have have to push the filler rod right in there...... just dipping it isn't enough_________________Chris
Reply:Originally Posted by MicroZoneThat's an awefully big tungsten. I'd probably stay with 3/32...but I guess that's preference. To me, the amps seem high, I would have started around 150 or 160.
Reply:That was fast, thanks guys.  My son smoked a 3/32 tungston a few days ago.  So I tried the 1/8.  As you guys said, its operator error, not equipment or settings.  I'll try it again.  Sure was a purdy weld.  At first I thought it was torch angle, but It was on both sides of the bead.  I have only had this thing for a week, what a fun toy.  Pics next week of what it (I) can do.I'll try a few less amps and TRY a 3/32 electrode.  Lots more filler.  Thanks  I love my Arcmaster.  The name fits.DavidReal world weldin.  When I grow up I want to be a tig weldor.