Creality Ender 3 hotend and part 80mm fan duct and mount
thingiverse
This is my take on creality ender 3 hotend and part cooling. My goals were: * make it silent; * dont make it too heavy; * dont sacrifice airflow. I decided to use 80mm fans and and make ducts as large as possible. WARNING!!! 80mm fans are usually 12V while stock one is 24V. You'll need dc-dc step-down converter (like LM2596) to connect fan. Connecting hotend fan is easy part. You just need dc-dc step-down. Connecting part fan is trickier because it's driven by pwm. I've skr control board and managed to connect fan using custom firmware. I've used Marlin 2 and set parameters below. 1) to lower noise: #define FAN_SOFT_PWM #define SOFT_PWM_SCALE 3 2) to lower maximum spin (it's 5V to 12V): #define FAN_MIN_PWM 50 #define FAN_MAX_PWM 128
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