MK2S 60mm Noctua Mod (w/MK3 fan shroud)

thingiverse

This is a mod that will allow a 60mm Noctua fan to be used as the part cooling fan on an Original Prusa i3 MK2S. It also uses the nicer "surround-style" fan shroud from the MK3. I've been using it for about five days of heavy printing and it works great. In combination with a 40mm Noctua fan (with this shroud: https://www.thingiverse.com/thing:2076234) The printer is nearly silent. The only sound now is the stepper motors, which is greatly reduced by these feet: https://www.thingiverse.com/thing:1707045. I was hoping to see a slight improvement in quality on detailed parts with the different shroud shape, but I haven't pushed it to the limit enough to see a difference yet. I definitely don't see any degradation in quality. This mod does require you to replace the extruder body cover to make room for the fan shroud. This turned out to be much easier than I remembered, because you only have to remove parts that you're replacing (the two fans and the cover). It does mean, however, that it should probably be printed in PETG or ABS. I used the STLs from Prusa's site to make this modification. I'm not sure why the STL is a whopping 45MB. In the photos, you can see that I unwisely mounted the fan with the wires coming from the bottom, so I had to use a zip tie to loosely hold them up. I'd encourage you to put them at the top right. To attach the fan, I simply cut the wires from the original fan, added crimp connectors and a servo-style connector, and hooked it up. Just cut the yellow wire from the Noctua fan at the base. This is the fan I used (not a referral link): http://amazon.com/gp/product/B009NQMESS. This was inspired by https://www.thingiverse.com/thing:2462570. I liked it, but the airflow seemed too restricted, and for some reason it also messed up my heatbreak cooling (I have no idea how!).