Ender 3 - Safe & Silent Board Chassis Cover incl. Fan Guard

thingiverse

This is the final design of my replacement for the poorly designed original mainboard cover of the Creality3D Ender 3. It aims to solve three major problems: 1. The actual fan opening measures 40 mm and is free from near-field obstacles, while all edges are slightly rounded, both of which will significantly reduce fan noise. 2. Air is taken from the left side of the printer, thus contributing less to cooling down the bed and being generally colder than sucking air from below the heatbed area. 3. The fan opening is covered, keeping dirt and debris outside the main board area, as opposed to the original design which invites such messes into the precious main board space. The design was split into two parts for easier printing without supports. A one-part piece was attempted before, but removing supports proved too tedious. Printing vertically would not allow for rounded edges and has overall reduced stability. The two parts fit easily together, and after mounting the fan, some drops of glue can be used for long-term stability. Update: Some rounding was added to the top edges of the plate, along with inset holes for the nuts. This allows you to unscrew and change the fan even after gluing the roof onto the plate. The import direction for the roof was also changed to make it more obvious how it should be printed. Update 2: A version of the plate with "lips" was added to stop light bleeding from inside the case, thanks to an idea from @DrBoo! Update 3: A version for a 60 mm fan was created. The "roof" size remained unchanged, so please let me know if it works for you if you print one. P.S.: I published a design with the opening at the front before and decided to take it back, as this design with the opening on the left is far superior.