MK2.5S fan shroud FIX
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IF YOU KEEP HAVING THERMAL RUNAWAY THEN replace your fan shroud with this one, it reduces air flow from the fan across…
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- Source
- Printables
- Category
- Prusa Parts & Upgrades
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- Creative Commons — Attribution — Share Alike
IF YOU KEEP HAVING THERMAL RUNAWAY
THEN replace your fan shroud with this one, it reduces air flow from the fan across the heat block.
This should fix your mk2.5s upgraded printer and not require a silicone sock or fan speed adjustment in the slicer. I have put this on my mk2.5S upgraded mk2S. It has solved the Thermal Runaway! If the fan kicks in high it will cool the nozzle quickly but not directly affecting the heat block with a rush of air that the heater is unable to recover from.
Print in ABS.
This has break away area on bottom between nozzle ducts that needs does need to be snapped out.
Final picture in series compares original nozzle in back to this fixed version (blocked so air no longer blows directly on heat block but still is directed to the nozzle.