Quote Originally Posted by Rambozo View Post
.062 does take practice. What arc length are you holding? What amperage are you running? It sounds like you might be losing the arc and the HF kicks in to restart it. Typically that is from too long an arc length or a draft blowing away your shielding gas. How are things with thicker material? 1/8" is a good thickness for learning.
I've tried really close and kinda far on yhe arc length...and everything in between. I notice the sputtering much more once I'm below 50amps. The machine does fine on 1/8" plate. I can run perfect beads on higher amps. As soon as i turn the amperage below 50 it begins to sputter. Even on thicker material. No drafts in the garage as there are no windows, doors are closed and no heat/ac running.

Could it possibly be moisture in the gas cylinder? I've been running on the same 80cf cylinder for well over a year.