My new mig has twelve voltage settings whereas my old one only had four, so means that I should be able to dial in everything more easily, but it got me thinking. Firstly, is the increase in voltage across the 12 steps linear or not? (I can’t find a spec sheet on the mig to see what the voltage range is.) Secondly, the amp range is from 20amps to 240amps, so how does this relate to the voltage steps given that amperage relates to voltage? As this mig has a 220 amp range over 12 steps, can you say that each step increase equates to 20 amps? (I know that wire speed will have an effect the amps.) Hope this makes sense! Finally, am I barking up the wrong tree?