Sovol SV08 MAX Fan Adapters

These adapters let you mount a 80x80x10mm (or 15mm) fan over the Bed Heater Controller.  There is also an adapter for a 80x80x10mm fan above the motherboard.

The fans need to be 24v.  You can mount a 12v fan on the plate that allows for a buck upconverter to convert the 24v to the 12v fan.

Print in PETG, ASA or ABS.  Not PLA.  Print solid with solid infill.

CAUTION:  You need a fan with enough airflow to cool the bed heater controller.  If there is ever a thermal runaway event and the bed heater is stuck at 100% the fan needs to cool as designed.  I take no responsibility in your fan selection.  I can only show what I used, that is untested in this event and merely an option you can choose on your own volition.

BED HEATER CONTROLLER FAN:

Mount the fan with the screws that came with the fan, through the adapter plate and into the fan.  I have holes to use small zip ties if needed instead.  The cage on the fan needs to be facing the Bed Heater Controller, so the direction of flow is to the bed heater controller.

The fan for the Bed Heater Controller needs to be a 3 or 4 pin 24 volt fan.   The 4th pin allows for modulation of speed, so it will run full speed with a 3pin fan.  The motherboard has a different 4 pin connector than you will find on a fan you purchase.  You will need to splice in the connector from the stock fan to this fan or buy the following parts from Digikey to crimp on new pins/connector.  Digikey PN 2057-25CTB-RTR-ND (order many extras), Digikey 455-2267-ND and you need the proper crimper.  It will take practice to get the crimps right.

In the 80mm fan plate (what I used on my printer), I used the following 24v 3pin 80x80x10mm fan from AliExpress:

https://www.aliexpress.us/item/2251832835782217.html

Noctua 40x40x10mm 24v fan was fit tested in the 40mm fan adapter plate.  ***there has been question if this fan provides enough airflow.

https://www.amazon.com/dp/B0CN39MCPL

In the 80mm fan plate, that allows for a buck upconverter (to use a 12 volt fan instead of a 24 volt), I fit tested a ARCTIC P8 Slim PWM PST 80x80x15mm 12v fan.

https://www.amazon.com/dp/B09VGX23DS

This is the buck upconverter I designed around: https://www.amazon.com/dp/B0DPGZ1YJS?

MOTHERBOARD FAN:

You can reuse the 4 bolts and lock nuts that mount the Bed Heater Controller Fan for this one.  Position the spacer on the inside of the stock metal cover and mount the fan to it.  The cage on the fan needs to be on the motherboard side, so that it blows towards the motherboard.  If the fan still rubs on the stock fan mounting holes/nubs then you can file them down a little.

I used a 2pin 24v GDS 80x80x10mm fan from Aliexpress. I purchased the ball bearing variation.

https://www.aliexpress.us/item/3256807327130067.html