Anicubic Vyper - Mainboard cover for 92x14mm Noctua fan

thingiverse

This is a mainboard cover for the Anycubic Vyper to exchange the original 80mm fan with a silent 92mmx14mm Noctua fan (NF-A9x14). https://www.amazon.de/Noctua-NF-A9x14-L%C3%BCfter/dp/B009NQM7V2 Other fans with the same size may fit as well, but I have not tested it. For the cover to be mounted it's not necessary to raise the feet of the printer as the fan is completely located inside the mainboard housing. I have the updated version of the Vyper from end of 2021. I don't know if this cover will fit for the older version as well. The new Vyper version uses 24V power for the fan. The Noctua fan needs between about 7V and 12V. So, a DC-DC step down converter is necessary. I use the LM2596. It's very cheap and reasonably small. https://www.amazon.de/gp/product/B07F38DJLS I added two holes to mount this LM2596 holder to the cover: https://www.thingiverse.com/thing:1160062 The holes are 4mm wide to fit a short M3 thread insert. I use the inserts from CNC kitchen (you need the short version, the standard size will be too long! When I wrote this text, the short ones were not available on Amazon): https://www.amazon.de/gp/product/B09CL2XDZ9 The two original screws in the front will be too short for this cover. You need them to be a few millimeter longer. The screw in the back is long enough. The DC-DC converter needs to be connected to the last connector on the board (always 24V, next to the connector of the original fan). The connector on the board is a JST-XH 2,54mm 2-Pin. You can either buy a set of connectors and crimp them to new cables (fine criming tool required) or simply cut of the original connector from the original fan and solder it to the LM2596. Make sure to turn down the voltage below 12V with the DC-DC converter before connecting the fan to it. By default, the converter will simply pass through the 24V and damage the fan. For connecting the LM2596 to the Noctua fan, you can simply use the cables that Noctua delivers with the fan. Just cut of one side from the Y-split cable, solder it to the LM2596 and connect it to the fan. You only need the black (out - ) and yellow wire (out + ). The other two cables are for a PWM signal and fan speed. Both are not used here as we directly control the speed with the DC voltage from the LM2596. The fan grill will cause some air noise, so I added a version without the grill. You can find a similar power supply cover here: https://www.thingiverse.com/thing:5250299