K8400 E3D v6 cooling duct
thingiverse
I'm utilizing the fantastic mod https://www.thingiverse.com/thing:2177331 to support 2x E3Dv6 hotends. The only issue I had with this configuration was part cooling. The stock K8400 part cooling axial fan is rather inadequate and Bo_Ris duct didn't move sufficient air, so I have installed a centrifugal fan into this newly designed duct that attaches to the E3Dv6 mounting block that Bo_Ris designed. I now operate my Vertex with 100% fan speed for PLA parts and can achieve perfect bow overhangs on benchy! My centrifugal fan is held in place with some electrical tape for now. When I get some fresh superglue, it'll be glued in place which will look far nicer.
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