A Miller 211 will run on 110 or 220 and can operate a spool gun. The only thing that will hold you back is duty cycle if you are welding 3/16" for a while. Anything bigger than that and you will be looking at a Miller 252 or will go 1/2" however it is 220V only and no Autoset feature which comes in handy. Essentially Autoset allows you to flip a switch and the dial indicating material thickness and proportionately follows the voltage/wire speed table. In my experience it is pretty darn close for most projects if the metal is clean, etc. As with everything the prep and skill of the operator will make or break the performance of the machine.
I think, THINK, Autoset must be more than that. If I manually set the voltage and wire speed, with clean metal I get an acceptable weld. If I go to Autoset, I get a great weld. I have the feeling, FEELING, that Autoset is always varying something while you are welding, wire speed or voltage or both, to obtain the best weld possible.
Or I could be full of it.
