Low friction filament guide

thingiverse

Made the filament guide suggested by AnyCubic. I realized that it presented excessive friction even after replacing the plastic pulley with an aluminum one, making the Nema feeding the filament unpleasantly slow. I designed and built a new model using a larger diameter pulley moving on a ball bearing, eliminating the friction problem for the Nema. The original AnyCubic filament sensor, cute as it is, constantly falls out of its seat, so I created a dedicated sensor to be applied in or out. Even with this addition, the friction remains low and doesn't impress the step-by-step motor moving the filament. Test pieces were made from PLA, while final ones will be printed in ABS at least. The inlet and outlet bushings allow for applying a bush that can be made of brass using a lathe or printed in nylon or Teflon. The bushings are not integrated into the pieces because they're subject to wear and need to be replaced. A filament cleaning and lubrication filter is in development, similar to the sensor, which can be inserted in or out of this filament guide.