Multiple Mechanism Auto-Rewind Spool Holder

A compact and reliable filament rewinder based on a linear counterweight mechanism that can be produced in a single 11 hour print.

Provides a complete filament management solution eliminating the need for the space wasting and difficult to load filament buffer.

Offers many PTFE attachment options supporting a wide range of spool, MMU, and printer configurations.

This rewinder supports filament spools with the following dimensions:

- diameter up to 235mm

- width up to 90mm

- hub diameter between 50mm and 75mm

The stand included in this design supports three different rewind mechanisms:

- Gear and vertical track linear counterweight mechanism (included in this thing)

- Universal spring rewind hubs designed by Vincent Groenhuis

- Martin Hoffman's rewind arm mechanism

My hope is that one stand which supports three rewind mechanisms will encourage more people to print and test a rewind solution as part of their MMU deployment.

The only non-printed parts required are:

- three 608 bearings

- a counterweight (a 0.5" or 12mm bolt and nuts are commonly used)

This design was inspired by the earlier work of Vincent Groenhuis and Martin Hoffmann.

Please see the thingiverse page for details.