Support for filament sensor and ventilation in Ender 3 PRO extruder.
cults3d
Support for filament sensor and ventilation in Ender 3 PRO extruder. I added the extra ventilation to avoid that, if there is a lot of retraction, the filament gets hot and breaks, especially in summer it happened to me a lot. The fan is in parallel with the layer fan and controlled by a switch. A piece of filament passage tube is added to the filament sensor. To program it I have changed the firmware of the Ender 3 to Marlin 2.0.9.1
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