The spool roller is the ideal platform for simple, low cost, light, convenient and effective filament spool mounting. It is easy to build with minimal hardware, requires minimal effort to mount and dismount spools and takes up minimal space. This design was motivated by the basic simplicity and efficiency of the roller configuration while trying to address the inherent weaknesses in existing designs.
Improvements and Key Features
- Fully parametric allowing complete control of all options from minimal lightweight to reinforced designs supporting virtually any spool size
- Ring structure provides better stability with minimal filament and if using ABS, suffers less print warping compared to straight edges
- Optional retainers prevent spool dislodging when weight reduced and allow mounting at any angle
- Inner flanges on bearing holders negate the need for washers on the base
- All parts can be printed apart from bearings
- Spools can be changed quickly without tools
Alter the required values using the Customizer or editing directly in OpenSCAD. The minimal configuration without retainers requires 4 bolts and nuts and 4 bearings. All parts are printable except the bearings.
If using the optional retainers, threaded rod can also be added between the retainers with 2 bearings to secure the spool at any angle. I have included printable substitutes for metal 8mm nuts, bolts and threaded rod that print well. See NUT JOB | Nut, Bolt, Washer and Threaded Rod Factory http://www.thingiverse.com/thing:193647 for more info.
I recommend using at least 40% fill for the base and 100% fill for the nuts, bolts and threaded rod.
Note: The ring style base will require a slightly larger build area than a radial design.