I have trouble using G31. I am new to all this.

When I type into the MDI screen G31 Z0-.1, nothing happens.

I tried the probe wizard ( the one by Art) and the program runs except that at the G31 lines almost nothing happens, the program just goes to the next line of g-code most of the time. On the occasional G31 instruction it seems that the Z backlash is taken up. This happens even when probe depths of .1" are input.

I have verified in the Diagnostics screen that the probe is seen by the program ( the LED blinks when I trip the probe with my hand)
This happens with the probe active high and active low
Version 1.84.001 and 1.90.053

Am I missing something?
Thanks

try this in MDI dro

place the probe just above the work

Type :-
 
G91 G31 Z-1. F10.

I tried in MDI field as well as a g-code program.
No effect in 1.84.001 and 1.90.053
( actually the first time I got a "micro-move " in the Z axis. All subsequent attempts had absolutely no effect)

Is it possible that this is limited in the Demo version?

Try to put in a debounce of 1000. You may be reading noise...

Debounce of 2000 seems to work for 95% of the probe cycles...now to debug the other problems, thanks