Porosity With Tig On Mild Steel.

[Subwayrocket]

No not yet, too many other demands upon my time to strip the welder.
I will report back when I find out what it is.
This welder used to be very good for tig which is why I'm flummoxed at present.

Go get a piece of known metal , say a piece of 304 stainless ...or grind off a piece of known mild steel ...see how the identical setup works. Go back and look at that thin wall tubing and tabs you had probs with. Upload some pics of the thin wall tubing and tabs just as they are , prior to sanding/grinding ...if it's zinc coated or Galv , it will weld like hell . It's like striking your tungsten on a match. It flares up, stinks and has porosity . Another good idea is to post the question on weldingtipsandtricks , that forum has a lot of very helpful members .