What is difference between Lincoln's Invertec TIG and their regular TIG

What you are dealing with is the basic difference between Inverter based power supplies, and Transformer based power supplies.

Transformers are big, heavy, and relatively simple machines inside, but they don't have the ability to really play with the electrical characteristics of the welding arc when compared to Inverters.

Inverters are small, portable, really efficient, incredibly complicated inside, and can do things transformers can't, like adjust the AC output frequency when welding aluminum.

Transformers are stuck with the 60 hz that the wall power power supplies, but Inverters can adjust the frequency between 20 hz and 500 hz. This change in frequency has a profound effect on the quality of the AC arc on aluminum.

For DC TIG the arc is not very different, although inverters are more likely to have pulsers/slopers/sequencers for better arc control on thin material or production welds.

So then an Invertec can do all the welding a regular TIG, like the

Jim R.

--Actually Ernie showed me that you can do some aluminum welding with DC. There are limitations but it can be done.