I have aquired a BP with a Boss 4 controller. A freebe! Not sure where to start on the beast. I don't have a 3phase converter, but have wired it in single phase with the lines going to the spindle motor dropped off just to see if I could get the axis motors to run. All the led's illuminate on the panel and it says "WAIT" on the display screen and stays in that state. Im not much on the electrical side of things. Do I need to have it wired 3phase for it to function or is there another problem? If I go into the cabinet on the right side of the machine I can achieve motion by manually pulling in the relays on the X,Y,Z axis. Anyones help would be greatly appreiciated. I have this setup in my garage and wanted to get it running as my 1st piece of hobby shop equipment. If its not worth messing with the old controls then I will be looking to upgrade and will probably be spending a fair amount of time reading and asking for advice.