[QUOTE=reuel;2093404]
Quote Originally Posted by JoshG502 View Post

fro the pinout it shows that YOUR BOB can turn on/off the spindle using the relay via pin 9 from Mach3 but cannot control the speed using Mach 3 since that BOB does not have any "0-10V variable analogue voltage port". So just manually preset the spindle speed and use Mach 3 to turn on and off the Spindle.

Perfect! I'll give this a try after work today thank you! I had it working yesterday but the CPU crashed and now it won't work lol I'll try uninstalling program and reinstalling it.

You will need to replace with another BOB if you want to control the spindle speed via Mach 3.