The motor is an AC DC universal motor. The speed control is a minirak 90vdc motor controller. The knob is attached to a 10k ohm potentimeter. If you have the later model it should say computer in the extream counterclockwise position. If that is the case it switches a jumper on the speed control so it will take a 0-10vdc signal to controll the speed. In theory 10000rpm would be 1vdc per 1000rpm. You can purchase a board from cnc 4 pc that will take the 0-5vdc signal from Mach and interpalate it to a 0-10vdc signal. The instruction manual for the Minirak controll can be found through a google search. If you decide to do all of this I can help you avoid a lot of pitfalls. No sense in reinventing the wheel. I had to figure most of this out myself. I retrofitted a Spectralight mill and am working on an auto tool changer for it. If you are planning on threading on the lathe there are some easy solutions for that as well. If you know a little electronics you can save some money with a few scavanged parts.
Jeff  |