Quote Originally Posted by erasma View Post
1.) What voltage are you using to do you probe setting? or is it just an open wire to the BOB?

2.) unplug your VFD or Spindle motor and try a few times to touch off

3.) check your voltage on the wire's of your probe setter see if there are any spikes or continuity happening
1- It is connected to ground on the BOB with one wire and one of the inputs (number 2 I think) I have tried switching the wires around to no difference in result.

2- I did try this before, again no difference. The VFD is not in the same control box and is grounded by its own plug.

3- I have not done this. However I can see that it must be working to a degree as the led indicator in the diagnostic screen of UCCNC is showing when I touch the probe to the bit.

I am thinking it could be when the stepper driver starts the Z axis moving that is causing the issue as it lets me begin the process and registers the first touch, then as soon as it should start moving towards the plate it freaks out and throws the error message.
I will have a look again next time I can spare a few minutes.

Thanks

Ollie