i3 rework hall based auto bed levelling probe
thingiverse
Automatically retracts, based on MarcoAntonini's design and optimized for Prusa i3 rework extruder and mount. It works perfectly with no extra width added to the X-carriage and eliminates the need for a servo. I found it more consistent than the mechanical switch that was previously mounted via servo. To assemble this retraction system, you'll need the following parts: A custom-printed part, A Hall-0 probe (the arrow-shaped type), I sourced mine from Mauk.cc, A probe (I used a long nail with its head ground off), Two 5x5x5 magnets. Refer to YouTube for detailed tutorials on assembly: https://www.youtube.com/watch?v=Pw-_rV1bQAU, https://www.youtube.com/watch?v=LtXKFc6Ru7o.
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