Thanks for the info Kivinen, however it's not working just yet. Interestingly, when I set both the PWM Pin and the M3 Spindle Relay Pin to Active H...

I think I'm with you now. So the endmill will be connected to to ground? I did I quick test and the body of the spindle isn't connected to the collet,...

Hey Doc, That's not really what I was after as that will only tell you the height at the sensor. Instead of making the electrical contact within th...

I've got the HF Spindle running on a Mk1 420. The question I've got is how to control the speed from within UCCNC? I've got the parallel cable conn...