3018 CNC Endmill Pi Loft Mount - Fully Parametric

Fully parametric Raspberry Pi 3 mount for a CNC endmill mainboard with a 90mm x 75mm bolt spacing. Mine's a Vevor 3018 CNC but the 3MF/STL files will VERY probably fit other sizes of CNC's as long as the mainboard bolt spacing fits those dimensions – for other bolt patterns, Modify → Change Parameters and alter the CNC_Mount_X and CNC_Mount_Y parameters and you should be good to go.

I was looking around for Pi mounts so I could run CNC.js and I saw one in a collection of parts by jmshrtn (the remix source) that I quite liked the looks of, but unfortunately the bolt pattern didn't match up. Only STL's were provided, but it seemed simple enough geometrically to reproduce from scratch, so I reverse-engineered it in Fusion360 with the right dimensions for my mainboard.

It does “give” a slight bit on the top-right if you push down on it, wouldn't be too terrible of an idea to adjust the design with a fourth support leg if you're so inclined but I don't think it's really needed unless you're running some Pi Hats or have the board mounted to a spot that moves. If you don't put strain on the mount, it works quite well. Shouldn't be too hard to adjust the Fusion360 file to add a fourth leg. I probably won't unless the mount breaks, and I don't reasonably expect that to happen on my setup.

!!! REQUIRES 4 x M2.5 HEATED INSERTS AND SUPPORTS !!!

This is one of my rare designs that due to the constraints doesn't have a good way to avoid supports. Yes, it's a lot of supports to remove, but no one sees the underside so I don't mind it too much. The mounting holes for the Pi require 4 x M2.5 heated inserts as well. Nylon screws and nylon standoffs are HIGHLY recommended to avoid shorting anything out. Nylon nuts also work as standoffs as I did with mine.

The goal with the standoffs is to avoid any of the solder points from being crushed against the plastic, I didn't include any in my design in the hopes I could quickly come up with a way to avoid the need for supports if I printed it upside-down, but I couldn't think of one off the top of my head that would keep the same design aesthetic nor an easy way to do it in Fusion360 so I nixed that idea. If I have to revisit it, I might look more into that so I don't have to print with supports – I will update it here if/when that happens.