Anycubic i3 Mega Feeder Cooler

thingiverse

On my Anycubic i3 mega I had issues with prints that involved excessive retraction movements. The stepper motor of the filament feeder got extremely hot, causing the filament to soften and bend within the feeder. I designed a small enclosure that utilizes two 40mm PC cooling fans to blow cool air into the feeder mechanism. Since then, I've had no print failures whatsoever. As my printer is integrated into a cabinet, I added two hose connectors to draw in and expel air. If you're using the printer without a cabinet, these hose connectors can be omitted. The fans typically operate at 12V and can be connected to the free power supply connector within the printer, allowing them to run automatically when the printer is powered on. The photos depict a version where I secured the parts with a hot glue gun. However, please do not use this method; instead, opt for glue that's more heat-resistant. I employ a rubber band to keep the cooler box in place, as the two hoses occasionally cause it to shift apart. Setting the overhang angle to 70° significantly reduces support material usage and makes removal much easier.