Following my last post, I’ve begun to model the actual inside of the quadcopter into CAD software. It’s very important to me that the various boards and parts are all mounted very securely using screws and are neatly arranged, and so I’m modelling the inside first, to determine the exact amount of space I need, and I’ll design the rest of the casing from that.
Here’s a render of the inside of the casing as I’ve modelled it:
This is the result of much deliberating over how to position the screw mounts for each board. The ESC sits in an inset in the bottom of the casing, for stability, but the footprint of the ESC is larger than that of the Arduino (which has to go above it), and so I realised that there would have to be some overhangs to allow for screw mounts directly over the ESC.
With this now in mind, I have designed the mounts as perpendicular ‘bridges’ over the ESC, which means they can be printed directly with support underneath that can then be removed. The screws will go down from the top of the board and be secured by a nut below the plastic, as below:
The next challenge is to design the main body and then put the two together.