Wanhao Di3 Cobra Fan Blower->40mm Adapter

thingiverse

I've been using the cobra fan (v39 @ http://www.thingiverse.com/thing:1090433) for sometime now and it's a great duct. My complaint has always been the crummy 50mm blower that mounts on the back. I never liked how far back it stuck out, nor how loud the fan was. I would get awful vibrations and sounds when the fan would go bad. So I had enough of it. Rather than design a new duct, I felt an adapter was best. The original CAD model is available in Onshape shoudl you want to change something:https://cad.onshape.com/documents/3d8fc1efb90057f0274f856b/w/1e0379e855853abf1d09aa97/e/755a963c4f30e4a74b1d0b1c I use these 4020 fans, http://amzn.to/2fRd7Vk. I find that while these are 20mm thick vs the std 10, they blow nearly 3 times the air of any 50mm blower fan and almost 4x that of the standard 10mm fan. even more importantly their pressure rating is 3x which means less backflow or turbulance and more air on your parts. I'm pretty confident I can significantly lower my PLA fan % with this on, just haven't palyed around with it yet. Print Settings Printer: Wanhao Di3 Rafts: No Supports: No Resolution: .2, .3 Infill: 40% Notes: print as shown in the pictures with the flat part of the duct on the bed. their's a 45 degree arm that helps support the mounting arm during print, but also helps stabilize the duct with just 1 screw.