Running Mach4 Hobby with PMGX 411 Smart Bob and a GeckoG540. I have the motors tuned and can drive it around, but I am unable to set Z using the Touchoff UI.  In input signal tab I have probe/Mapping Enabled with a green check. Device is SmartBob. Input name Pin 10 with Active low and Log Enabled are both checked green. I can see the probe wires light up the LED when i touch them together. If I run the Touchoff Button, it will lower the Z, but if I touch the wires together (not connected to bit/plate) ERROR: I get Unexpected Probe Touch.  Hoping this is something simple. Thanks

You could try swapping the Active low to high and try again.

What happens if you type this into MDI and touch the wires.

If you use inches

G31 Z-2. F5.

For metric

G31 Z-50. F125.

Hi
Switching off Active Low and the Probe led ceases to light. I tried running that code and nothing happened.
I ran the TouchOff UI pretty much at default with  Probe Rate:5/Retract Distance0.11/Prep feed Rate 60/Perep Distance .25/Tool Probe Diameter.250. It runs, but stops after .5 inches. If I touch the wires at any point during the TouchOff, i get the "Unexpected Probe Touch"
Thanks

Tried with Cycle Start MDI. That began travel in -Z. I touched wires and it stopped, but threw an error: No synchronized position from motion planner"