Ender 3 (And Pro) Octoprint Pi4B Case

This is an integrated enclosure for the Raspberry Pi 4B, specifically for users running Octoprint on their Ender 3 or Ender 3 Pro (Read note at bottom).

I am particularly proud of this design because of the elegant and simple approach I took when modelling it on Fusion 360. Everything has a 0.3mm tolerance so the parts should fit nicely when printed on a well calibrated machine.

The included Gcode SHOULD print perfectly on a stock Ender 3. I have optimised it for efficiency so that you don’t have to.

I have taken the time to create my own custom supports for the main body (Case v2.stl) which will drastically reduce the print time. I strongly urge you to use these and if you want to generate your own gcode with my supports, load the .3mf file rather than .stl into Cura. The gcode I have generated for this part will take about 7 and a half hours to print according to Cura’s estimate.

Features:

• The two vents are at the front to improve airflow and help cool the Pi, so that there is less risk of it overheating.
• The slot above the USB 3.0 ports is a way to route the cables for a PiCam, at the request of a user in the comments.
• I have integrated support for a standard SD card adapter for those who would like to keep this functionality.
• The lid is now removable via a snap-fit joint.
• There is optional support for a 40mm fan for additional cooling (see Lid_with_fan_v2.stl), as well as a fan shroud (optional_fan_cover_v2.stl)
• At the back left is a slot to route the USB-C power cable through, so that it exits the base where the wiring from the mainboard comes out.

I have not yet tested the design as of 13/04/20 so please provide some feedback if you decide to use it yourself. It is much appreciated!

Note: in the forseeable future I have no intention of testing the lid with fan support or the fan shroud. There should be no problems with them but my concern is that the snap fit may be slightly too loose.

Note for Pro users: I couldn’t find a 3D model for the Ender 3 Pro and do not have one myself to cross reference. This meant I had to reverse engineer from other people’s drawer designs so mine may not fit perfectly. I did, however, air on the side of caution so it will likely fit looser rather than too tightly. PLEASE feedback so I can work on the design if you print it for yourself! I will also not be providing gcode or 3mf files for the Pro.

Happy printing!