hi, i've setup a few of these spindle drivers on mach3, but it's been a while since i've seen one. I used a diycnc sp4dc board to give the 0-10 isolated signal and run command. First off i would replace the old film caps with new ones as they will fail eventually, and it's pretty dramatic when they fail. I have some pics hiding on my comp somewhere of the layout, but there is a thread on this forum about wiring the gemini board to mach3