Ok so I think I got this thing figured out. The sticker on the junction box that says 110v 220v is correct, as there is 220V being brought in, and also there is 110v in it to provide power for the power feed and DRO. So it will only run on 220v and can't be converted over. So I phoned an electrician buddy and he can install the proper 220V 4 wire plug for me for around $200 or so. One problem I have is that I would like to test the machine to see if it works before I get the plug installed. Would it be ok to wire a 3 wire plug on the end of the cord and plug it into the plug for my lathe to test? Lathe plug is 220V, and of course I would leave the power feed and DRO unplugged to test the motor. Thanks all