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A probe that can make Z measurements and then retract itself out of the way. It was designed for HydraRaptor but can probably be adapted for other wooden machines like Makerbot.
Print the parts, ream the 4mm holes in the guides so the rod slides freely. Drill the 4mm hole in the hat so that it is a tight fit on the rod. You could glue it but I haven't found that necessary. Press fit the two magnets oriented so they attract! Use a low force (e.g. 15gf) microswitch.
Mount as close to the axis of the nozzle as you can get and arrange the rod to be about 5mm above the nozzle tip in the raised position.
Attach a weight sufficient to operate the switch reliably.
Auto retracting z-probe by nophead is licensed under the Creative Commons - Attribution license.
So what's this mean?
We're sure nophead would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!