I have a Sieg X3 converted and running on Mach 3, my question is about controlling the spindle speed with the variable speed board on the X3.
The speed is adjusted by a 4.7K pot and has a switch for cw/ccw.
Could I wire a relay to the output pins for CW/CCW and use PWM to emulate the 4.7K pot and use a simple encoder for rpm feedback?