'D3vil Wears Manta' 120mm Fan Shroud/Mount

This is a combined fan mount/shroud for using a 120mm fan when doing the Manta M8P mainboard conversion on the Creality K1 Max. It is designed to be used with MackinsVII's very good M8P mount which can be found here: 

https://makerworld.com/en/models/372260?from=search

*IMPORTANT* While I tried to keep this design as universal as possible, I did also obviously design it based on my printer and the way I had routed my wiring. Because of the way I have closed off the sides of the mount, there are only several locations where wires can passed between the mount and the board, and so I can not guarantee that this model will fit with the way you have routed the wiring on your printer. Please do not try to force this model on if it strains your wiring, I am not responsible if you damage your printer while installing this model.

The idea of this design is that it has been aerodynamically optimised to promote airflow over the areas of the mainboard that require greater cooling, with the priorities being the Motor1 & Motor2 stepper driver heatsinks that don't sit directly under the fan, as well as the Compute Module at the rear of the board. This is achieved by closing off the areas of the board where air spill is not needed to reduce potential cooling loss, controlling the air through the ducts and pressure relief channels that direct the air where it is needed. There is also a central turning vane that helps grab air from part of the board that it is not needed, and directing it towards the stepper drivers.

While this is still a work in progress, as can be seen in the attached pictures the current shroud design vs a simple 120mm fan mount with no shroud has achieved:

• 5° drop in temperature on the mainboard
• 4° drop on the CM4 
• Motor2 has stayed relatively the same
• 2° increase on Motor3A
• 5° drop on Motor1
• Motor4 has stayed relatively the same
• Motor5 has stayed relatively the same (~1° increase)

For the sake of clarity, it should be noted that yes, on the test pictured here with the standard 120mm fan mount (no shroud), I was targeting an MCU temperature of 30°, where on the pictured test with the shroud I was targeting 20°. This is inconsequential, as the fan was still on at 100% duty cycle in both situations, with very similar RPM.

It should also be noted that yes, the image with no shroud was captured 67% of the way through 5 hour print, while the image with the shroud was captured on the first layer of a 10 hour print. Again, this is inconsequential to the results, as in both cases these temperatures are held very steady throughout the entire print duration and do not vary by more than ~0.2°.

None of this is ground-breaking, and certainly the temperatures with the standard 120mm fan mount are completely fine. This design was more a bit of fun for me to apply my aerodynamics knowledge to my printer, and will likely make absolutely 0 difference to the lifespan or effectiveness of the components. The only reason I am making this model public is because I did see some benefit of the design, and so others that like to get this nerdy about these sorts of things may enjoy it as well.

Future plans for this mod are to develop a replacement bottom panel that help direct airflow even further.

Required Hardware

For serviceability, I have designed this model to use 4x standard M3 heated inserts to secure the 120mm fan.

Recommended Print Settings

Material: Whatever you like. I used CF-ASA.

Nozzle : 0.4
Layer height : 0.1-0.2
Walls count : 3
Top/bottom layers : 4
Infill : 20% Cross-Hatch

Recommended Orientation & Support Settings

This model is pre-orientated, and should not require supports.

Your cooling settings will need to be fairly well dialed in, as the front of the shroud prints at a ~30° angle. This printed perfectly for me in CF-ASA without supports, but YRMV.