Summary

This is an auto leveling probe for the prusa I3 to fit This extruder

When retracted it is a few mm above the nozzle, when deployed it's about 10mm below the nozzle. Simply homing will cause it to retract safely.

Ill get a video and pictures up soon.

Instructions

626Pilot's instructions are very well done, so go there if you're having trouble.

Here are the basics.

Materials

Hall-O from Mauk.cc (ships from Europe to the US in under a week!)
3/16" Cube Neodymium Magnets from Amazon
Miniature 1/16" 12L14 Steel Drive Shaft, 3" Long from McMaster-Carr (get two, they bend easy)
x2 M3 30mm bolts
Jeweler's screwdriver set (do NOT attempt to do this with a regular screwdriver, or you'll ruin your sensor board!)

Hooking it up shouldn't be too difficult, important things are to make sure the magnets are oriented properly so that it will auto retract and also trigger sensor.

I am still figuring out how to get the calibration working, so I can't be much help there.

Hall-o Z-Probe