Quote:
Originally Posted by unclebilly
For aluminum TIG, you need Ac and continuous high frequency to keep your tungsten clean.
MIG welders don’t have continuous HF or even HF start. The welder shown is DC as well as are most MIG welders but could be wrong on this point.
This would be lift arc only and won’t work for aluminum at all.
Neat idea though.
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Not true.
Ac balance controls cleaning action of the part being welded, it’s measured by % of electrode negative or positive.
AC frequency is measured in hertz and controls focus of the arc. Lower frequency wider puddle higher frequency more of a pinpoint thin puddle.
Old machines transformers had a non adjustable 60ish Hz.