I purchased a 200dx a couple weeks ago. Metal finally came in, and picked up my consumables. Having several issues, was wondering if anyone can help troubleshoot. Using 3/32 rod and tungsten, 2% thoriated and 2% lanthiated. 4130 chromoly tubing (er80s-D2 filler) and 304 stainless tubing (316l filler). Both .065 wall, welder is set at 70 amps, 17cfh argon.

Lots of sputtering as well as wandering arc. Tungsten seems to be being used very quickly, and it will not hold a sharp point. There are times when there is a lot of smoke, and then soot/build up all around the "weld". I cannot for the life of me figure it out, as I've tried a new, sharp piece of tungsten and still get the same results.

Thanks for your help!