This filament guide prevents the filament spool from rocking back and forth during print, which may lead to the issue shown in the last picture (white filament spool).
With a reverse bowden tube, it also evens out the drag to the print head.
Inspired by https://www.printables.com/model/35971-original-prusa-i3-kiss-reverse-bowden-tube .
Print instructions:
- print details first, to check for tolerances. The fs cover and the gasket should have enough friction to hold the bowden tube in place. The gasket should give enough friction to the filament, especially if you plan on not using a reverse bowden tube.
- print the gasket in TPU, tip up, make sure it fits your filament size
- slice the arm with a pause, just before closing the gasket holder
- insert the gasket at the pause, find a way to hold it in place (see the wooden chopstick in the picture) and resume
- if you want to use a reverse bowden tube, you may also print the modified fs cover. Note that Prusa recommends to print it in black, for the good functioning of the optical filament sensor. Here printed in two colors (mid print filament change). Printed with support on the overhang on one side only, otherwise bridging.
The onshape source, if you need to modify hole sizes.
I used the Flashforge Adventurer3 PTFE Bowden Tube.
Based on the original spool holder and the original fs-cover from Prusa, although not really a remix.
Gauthier
