This WIP is a circular hotend fan to fit your Duplicator i3. It works with the 30mm original cooling fan.
UPDATE : v2.7 released (testing it again)
I'm trying to print some tests but for now it works okay (aka better than original fan duct).
This printed parts are between 0.3 and 0.2 mm layers, 50mm/s, 25% infill and i was printing PLA @195°C.
For the moment, it didn't melt or anything after 2 hours of printing (PLA again, so low temp compared to ABS) and I hope it stays that way !
As soon as I tried printing with Heatedbed ON, it melted a bit, and finally touched the part I was printing, grinding all over it...
=>DO NOT UNE THIS FAN DUCT IF YOU USE A HEATED BED<=
(unless if you print it in ABS or other High temp plastic)
I'll try to upload pics of the tests (with/with original/without fan) as soon as I make them ^^.
Any remarks will be appreciated, this is my first fan duct ! If anyone could print and compare their solution to mine, i'll be so happy !
- V1.6 has a huge opening on the bottom face, and it seems to be too big to create a "flow" of air...
- V1.7, I did an update with only 9 holes directed from the inner ring to around the nozzle. I'm testing it right now. Better direction but not enough flow.
- V1.8 : holes all around, works really well !
- V2.2 : Big modifications, with larger surface on the builplate, and longer channels. Best option at this time. The flow is circular and directed to the platform just under the nozzle.
- V2.7: NOT CIRCULAR ANYMORE (for questions of intensity of flow, this is a test) and new longer channels ! Trying it right now !
The biggest problem I am facing is a swirl/depression (I have no idea what I'm doing ^^) inside the tore where the air is channelled (inside the part).These "airswirls" are blocking some of the holes leaving the new fanduct with less pressure than the original one... I'm still working on it and figuring step by step how airflow goes in the damn thing ^^. Don't hesistate on making comments, trying parts out by yourself and/or giving ideas and solutions :D