Description
See GitHub for more information on the project.
This is a full filamentalist kit (x1) - including all the components with BOTH an 80mm and a 100mm shaft so you can choose your configuration freely. This is a DIY kit, you will want to print your own parts!
From GitHub:
Description & Theory of operation
The Filamentalist is a passive (no motors or electronics required) integrated buffering and spool holding multi-material unit (MMU) solution. It provides space savings and potential filament path reduction that comes with using paths from spool to buffer to MMU.
- The Filamentalist uses the axial force delivered by the MMU gear motor along the filament to load and unload to and from the filament spool.
- An adjustable spring clamp forces the filament against two o-rings that sit on the drive pulley to create a high traction interface for rotating the axle and filament spool.
- A one-way clutch style bearing locks against the drive shaft and rotates the filament spool to take up filament during an unload.
- For loading and print extruding, the clutch disengages allowing for effective free-spooling of the filament spool similar to a roller style spool holder.
- The difference in diameter of the filament driven clutched roller versus the larger rim roller that the filament spool sits on provides the needed gear ratio to produce enough rotations to take up, and unload a nearly empty or full filament roll.
- During unloading/buffering, to account for the varying diameter of a spool from full to empty, filament tension will cause the spring loaded arm to lift a small amount and release traction from the o-rings allowing slip to occur between the filament and the o-ring interface of the rewinder producing a dynamic, continuously modulating variable gear ratio (full spool = max slip, empty spool = no/minimal slip).
