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MK2.5s - MK3s fan shroud modification...

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Creation quality: 5.0/5 (1 vote)
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  • fan-shroud_V2_v2.stl
  • fan-shroud_v7.stl

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Publication date 2021-05-05 at 23:07
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Published to Thingiverse on: 2019-09-21 at 21:42
Design number 419874

3D printer file info

3D model description

3-19-2020 NEW Version uploaded V2 is a newer version with a bit better air flow.

This is a "remix" of the fan shroud from Github.

The one that ships with the printer/update kits actually allows too much air to hit the hot end and can cause a thermal runaway. For a while I got by with turning the fan speed way down, but you can only go so slow.

So I found the model on Github and made a tweak to the central air flow, it doesn't stop it, just lets less through the center and more at the part.

This and a silicone sock allows me to use 60% fan without thermal runaway. So I call that a success.

Note: Please print in ABS like Prusa suggests.

Since I have the sock, I'm trying mine in PETG to see how well it lasts.

Follow up:

Even with the sock, PETG was getting too hot. I've printed a new one in ABS, and attached pictures. Still working well, and I've had the fan up to 80% without a thermal runaway.

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