Simple servo auto bed leveller for Geetech i3 Pro B

thingiverse

I examined numerous auto bed levelling systems and one feature most have is inadequate clearance. Consequently, I designed this system which utilizes a cheap SG90 servo and mouse limit switch. There are only three primary components: the servo box, the rotor, and the flag which has two small rings for trigger and stop. It is wired in the same manner as the 3D touch but uses the standard Z microswitch connection as a direct replacement. With a clean bed, the standard deviation was 0.009mm which I consider acceptable. The microswitch used was a tiny one from a mouse, and these are available on eBay D2FC-F-7N. It was designed in Pro Desktop. The unit attaches to the mount underneath the Geetech i3 Pro B extruder and the servo extends under the mount close but not too close to the hot end. https://www.youtube.com/watch?v=7KxjlgqKA44 https://www.youtube.com/watch?v=hnLXu49-WnE Modifications: I included a second design which prints a V6-J hot end holder with a combined bed leveller using the original microswitch and SG90 servo. I also included the DXF files for laser cutting the rotor with a spline for more secure mounting. The laser cut parts are assembled and glued. https://www.youtube.com/watch?v=Gs4FVH9Xf4o