Marius Taciuc
The mechanism consists in a couple of lids mounted into the side holes of the spool. These lids are having 4 claws each and they slide on the smooth surface of the rod. The tips of the claws are gently pushing against the rod's surface and this uses the elastic properties of the PLA plastic.
Check the links below for downloading all of the parts from the video.
Prusa (Mendel) i2 was my first printer to begin and experiment with. Once I started to gain experience, i began to recreate some parts and now I've decided to make them public. MK8 extruder: https://cults3d.com/en/3d-model/tool/mk8-dual-extruder-for-prusa-mendel
Heated bed adjuster: https://cults3d.com/en/3d-model/tool/heated-bed-adjuster
Prusa volume enlarger: https://cults3d.com/en/3d-model/tool/prusa-i2-volume-enlarger
Endstop holder: https://cults3d.com/en/3d-model/tool/end-stop-holder
Springy legs: https://cults3d.com/en/3d-model/tool/springy-legs
Spool holder: https://cults3d.com/en/3d-model/tool/claw-lids-spool-holder
Power supply holder: https://cults3d.com/en/3d-model/tool/atx-ps-holder
the.wretch
Xo Ne Un
heinz
Russell Munro
Riiiight! I never thought of it... and I thought I'm being original. It seems like it's nothing new under the sun.