Mk8 Dual Fan Shroud Adjustable
thingiverse
I decided to cool down the extruder and simplify the process. I used two 30mm 12V fans, each connected to a Ramps Fan Extender on pins D6 and D11, or one 12V fan and one 5V fan on pins D9 and D44, respectively, controlled by the ramps board. The upper fan turns on when the hot end reaches the temperature set in the Marlin config (180 degrees was my setting), while the lower fan cools the part using PWM. I printed this item with ABS material and added support during the print process.
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