Bolted Raspberry Pi Zero W Mount for Prusa i3 MK3

thingiverse

This is a edit of [dktosoch's Raspberry Pi holder](https://www.thingiverse.com/thing:2433291) . **Revised 10/16/2018 - there was slight interference between the arm and the extruder. I believe that the origin of that problem was the R3 extruder housing redesign on August 2018. The revised mount moves the raspberry pi closer to the centerline. I liked dktosoch's design but it did not fit my machine. I recently changed the bed on my printer from the supplied 6mm diameter solid spacers to a set of 8mm diameter compression springs. Because of that (1) the spring would not allow the arm in dktosoch's design to slide into a set position and (2) using dktosoch's arm would result in having to take out a spring. This is my redesign which (1) removes the slot on the arm, (2) adds a hanger near the top surface to support the weight of the Raspberry Pi + holder, (3) adds a retaining plate with a stop at the bottom to prevent rotation of the arm, and (4) adds a small wall to prevent the arm from sliding inwards (towards the heat bed). Additionally, I sized the gap such that there should be little movement outwards (away from the heat bed). The design should be quite resistant to movement during printing. A few notes on printing/installation: - As shown in one of the images, this mounts the camera on the front left "arm" under the bed. - There are two files for the arm. One is for a 8mm diameter spring or spacer. The other is for a 6mm diameter spacer. The metal spacer that came from Prusa is 6mm so use that one if you have not modified your printer. - It can be tricky to screw in the bottom retaining plate. I recommend rotating the printer such that the print bed is pointing vertically. It should be easy after that. - The bottom retaining plate has a bit of play. You should turn this plate slightly to close all gaps and limit the ability of the main arm to twist. It will be slightly out of line but this design allows for easier installation. - You need to print 6 parts: the bolt, nut, and holder for the Raspberry Pi and the arm, retaining plate, and bolt for the connection to the printer.