Frustrated and No idea what to do.

[JeremyFXDWG]

Ok.. so homing is resolved. I upped the back-off speed and it fixed the problem.

The spindle is still not working. I double checked all grounds and moved on ground that was not into a star to the same grounding point. It was for a small PSU but I moved it anyways. I also tried connecting and disconnecting the shield at the spindle end. I also jumpered out all limit switches right on the UB1 as to eliminate the wire runs picking up the interference. As soon as I click the M3 spindle button it say limit switch triggered. Nothing on the diagnostic page indicated a limit switch triggered....

If i slow down the acceleration speed it delays the time to the limit switch trips though the spindle never moves.

If I reinstall UCCNC I can still use the spindle.... once.

[cncdrive]

Nothing on the diagnostics page indicates it is a limit input because the signal is short, it is a noise pulse and so because it is short you can't see it as the communication as screen refresh rate are limited in speed and also your eyes.
The spindle never moves because it likely switches off (because the UCCNC resets) before it could actually start running.

Anyways it is 100% sure that if you receive a limit switch trigger then the limit input is triggered.
You can verify it with disabling all limit inputs and then test if it still triggers and it will not.