Setting up a z axis touch plate - which pin do I use?

[MarkEMark2]

I would like to add a z axis touch plate to properly set my z axis tool to the surface of the cutting project. Which pin would I connect the touch plate to on the Arduino (or Arduino mega 5x)? My homing now works on my 3 axis machine and this still needs to be figured out.

I think this is the last of my set up issues. Thank you for all of the support!

[fra589]

Hello @MarkEMark2,

It is the Probe function that meets your need. So you have to use the Probe pin.
see https://github.com/fra589/grbl-Mega-5X/wiki/grbl-Mega-5X-pinout.

@++;
Gauthier.