Right lid w/fanduct for Teaching Tech Ender-3 universal rear el. case.

thingiverse

I have fitted Teaching Tech's Ender-3 Universal rear electronics case, a remix of which this is. With my MKS GEN-L motherboard, I encountered the issue that the stepper drivers were extremely hot. It appears in my setup, there are too many air-gaps for the air to be pulled across the electrical boxes as intended. So I came up with a solution. I grabbed a fan (available on eBay below) not currently in use and attempted to create something from the right lid without interfering with the stock-mounted Y stepper motor. This creation is not aesthetically pleasing and is difficult to print, resulting in bad overhangs. If supports are added, they can be challenging to remove. My best result so far has been to print it quickly with minimal supports and aggressive bridging. See some printing details below; you may need to experiment. A potential improvement could involve splitting this project into two pieces: the lid and fan duct, which could then be printed separately and combined by modifying the model to eliminate the issue. Maybe I will revisit this in the future, but for now, that seems unlikely. The .scad file links to a STL. You'll need the right lid STL from the original part. The .scad is full of hardcoded numbers and lacks parametric flexibility, so I haven't designated it as a customizer. Sorry if you're disappointed about this. Fan used: https://www.ebay.com/itm/Ball-Bearing-24V-4cm-40mm-40x40x20mm-Brushless-3D-Printer-Blower-Cooling-Fan/262935038423