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tig welding steel problem, the arc isn't getting hot enough

Posted: Wed May 19, 2010 10:21 pm
by gexas
I am trying to tig weld some 1/8 inch steel tube. I have a miller 180 sd which should easily be able to do the job. I'm using 2% thoriated tungsten that is 3/32 , I have the selector lever set to DCEN and my amps are at 130. The tungsten isn't balled at the end it is at a point and it is ground in the correct direction. The steel is clean and I have no contamination on the tungsten. However, when I hit the remote peddle only a very small and weak arc comes out. It can't even puddle the steel. I can tig weld aluminum just fine so I have no idea what is happening here.


Any ideas?


thanks,

E

Re: tig welding steel problem, the arc isn't getting hot enough

Posted: Thu May 20, 2010 8:16 am
by jpence38
sounds like a grounding problem

Re: tig welding steel problem, the arc isn't getting hot enough

Posted: Thu May 20, 2010 11:49 am
by gexas
Hmm, ok i will check that. I'm not sure how clean steel has to be tig weld it. I wiped it down good with some cleaner and it isn't rusty. I didn't grind the spot i'm going to weld down to bare new metal. I will try the grounding thing to make sure that is happening.

E

Re: tig welding steel problem, the arc isn't getting hot enough

Posted: Thu May 20, 2010 3:52 pm
by mister bobo
howdy-
try grinding a small spot where you clamp the ground to.
mister bobo