Thanks, did move to https://forum.duet3d.com/topic/17401/cnc-motor-control-with-esc-with-different-psu

I was asked to create a separete thread. I'm building a CNC with duet2 wifi
and the motor is controlled by an ESC controller. My Duet runs on 24V, the motor is using
a different PSU pf 12V.
I searched the forum and want to confirm that this setup is ok, not to fry anything.
For speed control, the ESC requires a servo signal, I hooked that up to a FAN pin.
I did not connect the servo VIN to anything.
Do the two PSUs need to connect the GND together?
Or any other tweaks to the wiring?
Thanks very much for checking.

Re: Problem controlling a cnc spindle

I have a question, my setup is :
Duet2 Wifi running on 24V PSU1
ESC Controller (with a servo connection) running on a different source PSU2 of 12V, connected pins +12v, GND, 1,2,3phases to motor
the ESC controller has a servo plug, do all pins need a connection to Duet? And are the FAN the best pins to use? I dont have an expansion board.
I dont want to blow up the board or the ESC.