Auto Change Pen Arm for Sphere-O-Bot

I quit on this project 2 years ago.


So far the hardware is:
2x 350mm 8mm smooth rod
1/4"-20 threaded rod from lowes,
1/4-20 nut
36x 6 x 1.5 mm magnets
misc 3mm hardware
4 LM8UU linear bearings

electronics is ramps 1.4 with marlin,

this site is where i found out how to run ramps with inkskape and ramps on an eggbot.
https://www.db4cl.com/projects/spherebot-update/






https://youtu.be/Ur_xyN_zECE