Manual Z Probe (and some code to get a servo working) by kenkelso 3d model
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Manual Z Probe (and some code to get a servo working) by kenkelso

Manual Z Probe (and some code to get a servo working) by kenkelso

by Thingiverse
Last crawled date: 3 years ago
The Prusa i3 from Prusa Reseach uses a Mini-Rambo board which does not have a connection for a servo so this is a manual Z-Probe.
BOM
1 x small micro switch the same as the Z End Stop one
1 x 3mmx20mm screw
2 x 3mm nuts or 1 x 3mm locknut
1 x small sprint 10mm long
Wire in series with Z End Stop switch.
For setup follow the Zennmasters videos athttps://www.youtube.com/watch?v=6msLOR_EfKc&list=LLhZVdzyiZNM0MAZBqKICWkw&index=3
but ignore the servo stuff.
EDIT: Added some code if you really want to get a servo working on a Rambo-Mini board.
Try as I might I could not get servos working on the Rambo-Mini, turning servos on in the code disabled stepper motors. So I added an Arduino Nano board and triggered it from pin3 on the Rambo-Mini P3 connector. The Servo.ino code has comments that show what pins to use. The Prusa firmware code is patched to work with this. Also added the STL for the bracket I used. BTW, having used these mechanical probes, an Inductive probe and a Capacitive one I have settled on the capacitive probe.

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