Quote:
Originally Posted by neilb
i'm having a little trouble with my tig, it welds as though there is no gas, the electrode burns up like it would as if the gas was off. i do have gas flow, pre - during - post welding. doesn't matter which type of electrode i use lanthanated, ceriated, zirconated. i have a gas lens fitted, i recently fitted a gas dryer in the feed line in case of moisture. i'm using and have always used argon/co2 mix, i only weld mild steel. machine is a uni mig 200 a/c
anyone have any ideas? i'm about to change to pure argon just to try it
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Neil, I tried this today on 16G mild steel sheet, all scale removed, and wiped down with Acetone.
Pure argon , near perfect welds, no problem at all, changed over to argon/ co2 mig gas, not good , tiny bubbles ,craters ,and the tungsten picking up
cr@p.In my opinion , for what it's worth, mixed gas doesn't work for me either.
Just another thought, I Scotchbrite the copper coating off my filler rods, then wipe down, this seems to stop the bubbles anyway.
Cheers,
Fab.