Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2610722.
Based on original work by [dulfe] and improved variant by [sagdusmir]
EDIT: Added photos of the final print, including some next to [sagdusmir]'s variant for comparison. Note that the notch in that variant was intentional; I was lazy when I installed it so cut a notch rather than move the fan wires around the hotend. I wasn't as lazy when installing my final build.
I printed [sagdusmir]'s remix but had some issues:
- there is a planar gap between the screwholes and the duct body. this may be an artifact of slicer settings, but i couldn't get cura 2.x to fill that gap
- when sliced the round exterior of the duct body included some odd thin wall artifacts
- the STL was not oriented for immediate printing (rotation of 151 degrees was required)
- once rotated the bottom of the design was not perfectly flat
I went back to [dulfe]'s original design and noted that all my issues exist there as well (though you only have to rotate the design by 150 degrees to be almost flat).
My updates:
- I imported the original STL into tinkercad, rotated by 150 degrees, and trimmed 0.1mm from the bottom to make it perfectly flat.
- I added (part of) a solid ring, aligned with the body of the duct but thicker so as to fill the planar gap and to clean up the exterior thin was artifacts. I made this ring 3mm tall rather than the ~1.5mm tall pre-existing backplate height.
- I added (part of) a rectangle with rounded corners to the design, 3mm tall, to fill out the backplate around the screwholes.
The final design is very similar to and should be a drop-in replacement for [sagdusmir]'s remix variant. It should print more cleanly and be just a touch stronger as well. Most importantly (for me): the design is ready to print immediately (no rotation/etc required).