Prusa i3 MK3 - Cooling with a view

thingiverse

## The Onega cooler for skelestruder is a better solution. I recommend that route. —- ** UPDATE** 11/02/18: added STEP file for folks to play with UPDATE 9/08/18: This is not really compatible with the new R3 cage from Prusa. I am not planning to address that since I have moved on to Skelestruder. I will leave this up for folks to derive. UPDATE 6/30/18: It was brought to my attention that the newer MK3 beds are shipping with screw terminals, which is better in many ways. But the screws are much taller than the previous solder connections so the low profile cover will not fit over those. Thanks to Shrikestorm for confirming that replacing the socket head screws with button head will fit. Also looks like you need to trim the plastic on the terminals. So you need to replace those two screws if you get this newer bed. When Prusa ever releases the new part design I will update mine. In the meantime, some hacking required. I found a way to improve the cooling AND improve the view of the nozzle AND simplify nozzle changes! Win, win, win. Wait! There's more: now with garter screw! What's that? It holds up your sock. Screw in M3x18 to provide light touch to hold upper lip of e3d sock. One thing that has always annoyed me about the original Prusa printers is the way the part cooling is attached to the extruder blocks the view of the nozzle printing. I can't tell you how many times I have been able to diagnose a bad/failed print by observing how the nozzle is laying down plastic. I also didn't like that you need to partially disassemble for nozzle changes. So I set out to get 360 degree cooling while fixing these problems. I also stumbled on a simple solution for keeping the silicone sock from dragging on the print which has many surprising (not in a good way) side effects. **2/05/18 update:** several improvements to air flow, printing, fit, strength. There are reports of the factory shroud sagging from high temp printing. This design is less susceptible due to larger surface area and multiple contact points. Nevertheless, I reinforced and added an optional clip for the back corner. Also built-in supports so no need to add in slicer. Brace is now optional and compatible with my laser mod. **3/20/18 update:** based on feedback, improved fit for bed cover, slightly increased PINDA hole, adjusted airflow.