AC frequency settings

I have zero experience using one however I have seen it demonstrated. You should be able to change the "shape" of the arc envelope. Low frequency should give you a narrow penetrating shape and higher frequency will spread out which is great for shaping the cover pass. The reason given to me was that with this feature you can get right to the bottom of a veed out crack. Try it and report back. Randy

Again, zero experience, however I can quote from the Miller Dynasty-200 manual:

"AC frequency controls bead width and directional control. As AC frequency decreases, weld bead/puddle gets wider. As AC frequency increases, weld bead/puddle becomes narrower and the arc becomes more focused. Travel speed can increase as AC frequency increases."

Also, I don't remember where I saw it, but it seems that when using AC frequencies above 60Hz, a pointed tungsten can be used, but you need a small flat at the end. If you try highter frequencies with a typical balled-end tungsten, you may not see the tighter more focused arc.

Kev> I have zero experience using one however I have seen it demonstrated. You

Thank you guys. Although I've just run beads on some flat aluminum, it does appear that the difference is reflected in the arc size and focus.