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 (which this is a remix of). With my MKS GEN-L motherboard I had the trouble that the stepper drivers were extremely hot. It seems in my setup there are too many air-gaps for the air to be pulled across the electrical boxes, as intended. So I whipped this thing together. I grabbed a fan (EBay link below) I was not using and tried to make something out of the right lid, without colliding with the stock mounted Y stepper motor. This thing is not very pretty and it's not easy to print, as you'll have bad overhangs, and if you support them you'll get supports that are really hard to remove. My best result so far has been to print it quite fast with almost no supports and crazy bridging. See some printing details below. You may have to experiment. A good remix might be to make this a 2-piece project so the lid and the fan duct could be printed separately, and combined with changing the model maybe avoid the trouble. Maybe I will revisit this, but I expect not in the near future. The .scad links to a STL. What you need is the right lid stl from the original part. Also the .scad is full of hardcoded numbers and low on parametrical goodness, thus I haven't even marked this as a customizer. Sorry if you are disappointed about this. :) Fan used: https://www.ebay.com/itm/Ball-Bearing-24V-4cm-40mm-40x40x20mm-Brushless-3D-Printer-Blower-Cooling-Fan/262935038423