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

thingiverse

The Prusa i3 from Prusa Research employs a Mini-Rambo board lacking a connection for a servo, thereby necessitating a manual Z-Probe setup. Bill of Materials: 1. One small micro switch identical to the one used on the Z End Stop 2. 1 x 3mmx20mm screw 3. Two 3mm nuts or 1 3mm locknut 4. 1 small spring 10mm in length Wiring required for the setup involves a connection of the wire with the Z End Stop switch. To achieve manual probe operation, follow the step-by-step guide available on the YouTube video linked at https://www.youtube.com/watch?v=6msLOR_EfKc&list=LLhZVdzyiZNM0MAZBqKICWkw&index=3 Ignore the sections related to servos in the provided link. Updated Section: Following difficulties with integrating a servo with the Rambo-Mini board, I opted for utilizing an Arduino Nano, triggered via Pin 3 on the P3 connector of the Mini-Rambo board. Modified firmware code is incorporated and compatible Servo.ino files feature updated comments detailing required pin assignments. Additional attachments provided include STL designs for the mechanical probe mounting bracket. Probing Experiences: A comprehensive analysis was conducted on utilizing three distinct types of probing devices, namely Inductive probes, Capacitive probes, and Mechanical probes. The evaluation ultimately concluded in favor of a capacitive sensing probe, demonstrating its efficacy and reliability.