This is the circuit I’m using now - a touch pad with and alligator clip you clip onto the tool. I’ll worry about getting it 100% hands off if I can get the basic concept working - for now I’m okay with having to manually clip an alligator onto the tool before performing the measurement.
Your idea of mounting this off the left side is exactly what I was thinking - essentially being able to hit a button, the tool zooms over, slowly lowers, measures the height, and gets a new calibrated Z offset - exactly like professional CNCs do.
I’ve been digging through the firmware and I don’t see anything specific to using G30 for only 3DP - my current line of investigation is to see if I can make the system think the CNC toolhead has a Z probe just like the 3DP toolhead.
