Yeah,
I'm not an old pro like Sage Hill with AC TIG, but I've had the lower-output EXT unit (210), as your/his new 255EXT. And though I haven't tried welding aluminum cans together, I do think the AC arc gets stable pretty quickly beyond its 5 amp starts on the Square wave, i.e. around 20 amps or less, with about 30% AC balance, a sharp tungsten, and around 120-200 Hz on AC frequency. The Triangle wave seem pretty cool for a finer bead too. Of course, AC TIG still seem noisy to me, compared to the calm and quiet DC TIG arcs. Also, I'm liking the 5356 filler rod better than 4043.
Please let us all hear how it goes with your new 255EXT, as I'm diggin' my 210EXT, but maybe can learn some new settings that you will discover, which could make it even better for me too.
Hey, look, the EDIT feature on the Forum here seems to work fine again. Maybe things here on the Forum are pretty good again. Whee...!
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