Originally Posted by
SeanMurphy265
I want to make sure you understand what I'm getting at. I'm not bashing the 211, because I think it's a good machine. Inverter welders are more efficient than transformer machines that's why they are smaller and lighter. I liked the smooth start on the miller I think it may be called ramp up (not sure). Years ago I owned a 110v millermatic 130 and I thought it was worthless. Way too heavy and way too under powered, I think it was more for welding sheet metal, but it was rated at 1/4" thickness. Inverter electronics are more advanced than transformer and that's why you have more options with inverters. When you get into the higher priced transformer welders you find more options available (lincoln power mig 350mp @ $5,000.00MSRP).
The latest inverter machines MTS200 and Thermal arc Fabricator 180i, 252 have more advanced electronics and are lighter than the Imig series (igbt). This allows you to get more options in your welder. I can stick weld with my imig 200 and do a good job, and I can scratch start tig (in a pinch, but not the way to go). The MTS you have the option to tig with actual tig functions. The simplest way I can explain it (Mark, Mike, and Ray can get you all the technical info) is the electronics get more advanced with they type of welder you buy.
I'm not sure about the newer transformer machines, but I know the older ones were fairly simple. The old power sources that I ran when I was doing structural steel had a big transformer with a bunch of copper, several relay's, and some switches. I've watched electricians repair the older machines; who had no knowledge of welding. The newer ones have more electronics and takes a different skill set.
That's a simple man's explanation, there are others who can tell you more specifics.