I tried to active the auto zero z axis on mach3, added script to button "auto zero", it works.
But i find if I touch the plate with bit ( digitizing the signal ON ),
it will move down , and do auto zero motion , even without writing any scripts onto button.
and i am sure this is not my script (different retract up value)..

so is there any script can be trigged by digitizing signal? where can i find it , i want to delete it , and use my button action.