Prusa i3 MK3 Part Cooling Fan Duct Remix

thingiverse

I made some tweaks to KevinTheGoalie's remix of RoboGenius's MK2/2S blower fan duct. I added a "rib" down the center of each air channel for support during printing. When I tried printing KevinTheGoalie's version in ASA and PETG, it would droop significantly and create filament loops that were hard to remove. Using one of those materials might have worked, but I decided to make this modification instead. It worked well, with no top layer drooping. My mission was accomplished. Most people recommend using ABS/ASA or at least PETG for this part. I made the RoboGenius duct from Makergeeks' Raptor HTPLA and annealed it in the oven; it lasted over 6 months of heavy use before I sold my MK2S. But, I'm not guaranteeing you'll have the same luck. If you have an HTPLA around and no PETG/ABS/ASA/PC/Nylon, you can try it. Just be aware of the risks. This time, I used ASA because it's cool – cooler than fezzes, even. Edit: I wasn't 100% satisfied with the fitment of this part initially. I made a few minor adjustments and found a much better fitment. I added that file as an option (the differences are moving the mounting hole up 1mm and shaving 1-2mm off the rib in the middle where the fan duct connects to the fan). Note: I use a non-standard nozzle that's a tiny bit taller than the standard e3dv6. If you find the "easy fit" duct sits too low on a standard e3dv6, please let me know and I'll try to make some more adjustments. It sits several mm above my tungsten nozzle, so it should be okay with stock nozzles.