Hello to everyone. I just bought a used Miller compactblu 183 welder. I have the wire feed set very low and the power cranked up to the maximum, yet it only just welds 1mm thick steel sheet. It was sold as a single phase machine but It looks like it can be changed between a single and 3 phase. On closer inspection it seems to have a 3 phase power cable, which has a basic household single phase plug on the end, I opened the plug and saw that it isn't using the black wire at all. Any help or advise would be great Thanks!