MakerFarm 8" i3v Prusa build by Printbus

[printbus]

RAMPS STEPPER MOTOR DRIVER COOLING FAN
I had printed a pair of these RAMPS 40mm fan brackets a while ago, and finally got around to installing the fan. There are various similar brackets on thingiverse, but I liked how the thinner legs on this one had less of a chance at interfering with something on the RAMPS board.

I hadn't noticed any issue with the stepper motor drivers running hot, so this is just a preventive measure. The fan I used is a Silenx 40mm fan I had from experimenting with various print cooling schemes. At 14 dBa for 5 CFM airflow, it is extremely quiet. The fan was installed so that the airflow direction is down onto the board. A fan guard was installed simply because I had one available.

Since I have a heat bed relay, there isn't much heat being dissipated in the MOSFET for the RAMPS D8 output. So, I positioned the fan assembly above the center of the four stepper driver boards.