Tig does require pure argonI believe that TIG requires pure argon
I had the chance to borrow my buddies SW200 a few years back. He's more of a MIG guy, but funds allowed for him to pick it up and then park it in a corner of his garage and ignore it. He let me take it for a spin (almost a year on borrow) and I really miss that foot pedal now.Well, I do have a MIG but converted it back to flux core wire as I so seldom used it. It leaked out more gas than it used. The TIG is now my preferred method on almost everything except the heavy stuff which I prefer to stick weld. My Lincoln Square Wave 185 takes care of both.