Hi Lemur,
- If you are just wanting to turn the spindle on and off -that is M3/M5.
- you would need to configure your Mach3 to work with your Break Out Board to turn that output on and off.
- I've never done speed control (yet) from Mach - but I know it is in Mach3 and can be done - to configure your Break Out Board for a voltage output - that corresponds to speed.
Joe