Root 3 CNC - RAMPS Cooling Fan

The Root 3 plans call for a 25mm cooling fan to be installed above the RAMPS board.  Due to the amount of wiring and difficulty mounting the fan above, I opted instead for a 92mm fan to be installed next to the board.

Noctua 92mm CPU Fan

Thingiverse Customizable Fan Grill Cover

Custom-made Fan Mount

Rather than attempting to only run the fan while the spindle is operating, I chose to simplify the design and hard wire the fan directly to the DC 12V power supply.  The fan wiring connector was removed, and the red/black wires had solder terminals added and connected directly to the +/- ends of the power supply.

The fan was attached to the mount using M3 machine screws/washers/nuts.