I have a dual voltage “accurate tool” 50amp machine. Its a china machine for sure but most people have good luck with them and mine works AWESOME! I run it on 220 and just crank it all the way up because you cant have too much amperage while cutting no matter how thick. I have a vintage craftsman 20 gallon compressor that runs it fine. Everytime I use it i say “this is one of my favorite tools ever!” Its amazing how fast and how clean you can cut. Ive been using a “death” wheel forever and they are fine but the plasma just runs right through work. Its literally like cutting paper with scissors. It’s ridiculously handy.