setting the direction pin to 0, throws an error in Mach 3, saying the only valid numbers are 1,2,3, etc. As soon as I click the spindle on, it starts to spin, then crashes Mach3. I'm not a happy camper at the moment. The Smooth Stepper I'm using is set to Step/Dir for spindle control, and 40 for pulse width. In Mach, spindle tab is set to enable output 1 and 2, which is set to pin 1 and pin 16. For spindle output control, it's set to step/dir. In spindle motor outputs I've got it set to 14, and any number, tried 0, 17, etc, and each time, it starts, then crashes mach3. Lovely.