The new transformerless welders use inverters (just like the spindle drives on CNC machines) to deliver constant current or constant volatge depending on what mode you select. The ones I've seen will run: stick, tig, mig, pulsed tig, pulsed mig, and carbon arc cutting. All you have to do is buy all the accessories such as the wire feeder for mig. I would love to have one some day, I hear the arc off one of these is awesome!
JP |