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I'm fooling around with some old sched 80 pipe joining segments running 6011.I did a bad job cutting the pipe and had a larger spacing than optimal in a section. I was running a little hot and blew the opening out yet still more - about 1/2" hole I made.I dialed the power back and tried to lay puddle that would start spanning the gap.Not a lot of luck with that so I tried flipping the leads to reverse the polarity making the Electrode Negative and a positive work clamp And dial the power way back.My thinking was that with the electrons flowing to the work it'd carry electrode more efficiently with it and let me get build up with a cooler weld.It seemed to help though I had to fiddle with the power a bit.Closed up the hole went back to DCRP and finished the pipe BFH tests didn't break the joint. Tell me,,, was flipping the polarity the right thing or did it make no difference at all? Maybe I should have kept fiddling with the power level instead? Sorry no pics - it wasn't real pretty anyway.Hey~!! It's a hobby. It's not supposed to make sense~!!
Reply:Electrode Negative, or Straight Polarity, will give shallower penetration. Sometimes you do what you have to do.
Reply:DCEN gives less penetration and more deposition rate. I find that a lot depends on what electrode I'm using. I can't fill gaps worth a darn with 7018, but I do okay with 6011 or 6013.Everlast PA160-STH... and that's about it! |
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