Yet Another Remixed Detachable Print Fan Duct for Prusa Mini + Revo Micro, this time "organic"
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I felt I wanted my own duct, roundish/organic and with a bit more clearance. Prints upright with no supports.
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Air is a difficult and chaotic medium; corners and bends affect it a lot, especially if a fan and not a compressor powers it, as is the case with the puny Original Prusa Mini(+) print fan. With such a fan, you can't really hope to build something like an “air nozzle” without losing too much power and thus flow. Both duct and holes should be as round and straight and big as possible.
Since I love having a detachable/removable fan duct and deeply felt the pressing need to spend fruitful hours on having my very own duct, I made one.
Tbh, it probably does not improve flow over the squareish/blocky versions by much. However, just like the others it accomplishes that no air is blown directly at the hot end. The area where the air is concentred includes the nozzle, but like with most other designs you still feel that from the nozzle onwards, air will flow to the front. The exit holes are not centered at the nozzle, I angled them very slightly towards the back and off-center because the air flows the other direction anyway.
I printed in Prusament ASA with a 0.25 nozzle, in an upright position with no supports, brim and draft shield enabled.