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 (up to 300mm with this larger stand)
• 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 rewind 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)

The linear rewind mechanism now has two additional stand options:

• There is a drybox for moisture sensitive filaments.
• User gcode22 released a very nice wall mounted stand.