Creality Ender 3 hotend and part 80mm fan duct and mount
thingiverse
This is my take on the Creality Ender 3 hotend and part cooling system. My objectives were straightforward: I aimed to create a silent setup, avoid excessive weight, and maintain optimal airflow. To achieve this, I opted for using 80mm fans and maximizing duct size. Warning: 80mm fans typically operate at 12V, whereas the stock fan runs on 24V. To connect the fan successfully, you'll need a DC-DC step-down converter, such as an LM2596. Connecting the hotend fan is a relatively straightforward process, requiring only a DC-DC step-down conversion. However, connecting the part fan proved to be more challenging due to its PWM-driven design. I'm using an SKR control board and have successfully managed to connect the fan via custom firmware in Marlin 2. To minimize noise, I've implemented two key settings: 1. Enabling soft PWM reduces noise significantly. 2. To adjust the maximum spin speed from 5V to 12V, I've set the FAN_MIN_PWM to 50 and FAN_MAX_PWM to 128.
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