I just picked up a used Powermax45 that I would like to use in a diy cnc tube/pipe cutter. I have a akz250 bob, what would I need to interface between the bob and the powermax cpc port? Pins 3 and 4 are for arc start stop, pins 12 and 14 are for motion, and 5 and 6 are for torch height. What do I need to interface these pins to the bob for control?