Hybrid annular fan duct
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Published on January 6, 2013
Description
I wanted to eliminate any barriers to airflow in murat's design, and since I've been using gijs fan duct I figured a combination of the two would be a good idea.
WARNING: This thing does get hot enough to warp if made out of PLA, but I believe that if made out of ABS it can be quite effective. Haven't tried that yet but it's on the todo list. Despite being flexible during printing the fan duct seems to hold up. We'll see how long until creep makes it useless.
UPDATE: Printed in ABS, actually handled the overhangs better than in PLA. The base warped a bit because my fan was going too fast so mounting it was very awkward. Managed to hack something together. Will test soon.
UPDATE2: Printed a hollow calibration pyramid (T:8757) using the new (bigger nozzle, made of ABS) fan duct, looks great! The best I've gotten yet. The next test is whether it will sag during a 10 hour print..
UPDATE3: been using the ABS version for three months now with no issues. It warped a bit initially because a portion of the nozzle touched my heater cartridge, but after mounting the heater cartridge properly it didnt warp further. Still works well!
WARNING: This thing does get hot enough to warp if made out of PLA, but I believe that if made out of ABS it can be quite effective. Haven't tried that yet but it's on the todo list. Despite being flexible during printing the fan duct seems to hold up. We'll see how long until creep makes it useless.
UPDATE: Printed in ABS, actually handled the overhangs better than in PLA. The base warped a bit because my fan was going too fast so mounting it was very awkward. Managed to hack something together. Will test soon.
UPDATE2: Printed a hollow calibration pyramid (T:8757) using the new (bigger nozzle, made of ABS) fan duct, looks great! The best I've gotten yet. The next test is whether it will sag during a 10 hour print..
UPDATE3: been using the ABS version for three months now with no issues. It warped a bit initially because a portion of the nozzle touched my heater cartridge, but after mounting the heater cartridge properly it didnt warp further. Still works well!
Instructions
Print without support. I used 0.16 layer height, 0.5 layer width with blue PLA. There are some pretty gnarly overhangs but it turned out ok. Ideally it should be made out of ABS though.
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murat
on
January 7, 2013
said:
Impressive that it printed as a single piece! A thick cardboard heat barrier could be all it needs not to warp due to contact with the aluminium hot plate when printed in PLA...
destroyer2012
on
January 7, 2013
said:
That is a good idea; the model would have to be redesigned to take into account the thickness of the cardboard. As it is, the bottom of the duct's nozzle is only a few millimeters above the tip of my hot end. If the ABS version melts I will consider redesigning it but for now it holds strong.
thecrazy
on
January 6, 2013
said:
Excellent. But i just measured and its too high for me, i only have 12mm of clearance under my x carriage, the arcol v4 hotend is very short :(
thecrazy
on
January 6, 2013
said:
mmm, when i preview the stl or load it up in netfabb there is a weird artefact in the intake.
License
Hybrid annular fan duct by destroyer2012 is licensed under the Attribution - Creative Commons license.
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Should be entirely possible to use with your new fan, seems like yours is actually smaller than the ultimaker fan, so you would just need to make new holes in the design at the new screw positions, and cover up some of that duct hole to fit the new fan.. I uploaded a STEP version of the design, it should be easy enough to redesign it because the duct part and the fan mount part are separate objects.