Here's one- is there a way to use the g28 function to edgefind ?

Here’s one- is there a way to use the g28 function to edgefind ? I’m on a tinyg, have my touch plate (steel bar) ‘hot’ wire plugged into zmin and an alligator clip running from the bit to ground.

Would I need to be plugged into my xmin and ymin as well or could I run something like a g28.2 ‘sensing’ on the zmin but moving in x ?

You only need to have the zmin connected. This is a TinyG “macro” or customization, so it reads from the zmin in firmware.

Speaking of which, I wrote an extension of the touchplate widget that does just what you’re looking for! @jlauer is working on integrating the changes into the main tinyg workspace, but in the mean time, you can use it from my workspace, http://chilipeppr.com/pyroavr-tinyg

Best of luck to you!