If you’re switching between filaments, you need something to keep the spool from unwinding. This model set is incredibly useful: a super simple, super quick filament clip with variations for a bunch of different spool shapes and sizes. With a quick modification prior to slicing, it’s also very easy to print out multiples:

View this post on Instagram

A post shared by Dwyer Devices (@dwyerdevices)

This model is fast enough and small enough that I end up using it to test new filaments or print settings, prior to running larger and longer prints. A model like this should be included in the SD Card that ships with the Prusa i3.

The low profile of the clip works well when stacking and storing spools. I wedge a bunch of spools together when I store them in an air-tight container, and I have yet to accidentally dislodge a clip.

• Source: 1.75mm Filament Clips
• Original License: Creative Commons – Attribution – Non Commercial
• Models: 
  • Hatchbox_1kg_Filament_Clip.stl
  • Up_Spool_Clip_v3-0.STL
• GCodes: 
  • Hatchbox_1kg_Filament_Clip_detail.gcode
  • Up_Spool_Clip_for_Prusa_spools_v3-0_0.05mm.gcode
  • 4x_0.10mm_Clip_for_Prusa_spools_v3-0.gcode
• Material: Hatchbox Yellow PLA 1.75mm / Prusa White PLA 1.75mm / Prusa Gray PLA 1.75mm
• Print Date: 2017/08/29
• Print Time: Quick / Untimed
• Slicer: Slic3r PE 1.36.2
• Slice Settings:
  • 0.10mm Layers
  • 20% infill – Cubic
  • No supports
• Printer: Prusa i3 mk2