Eliminate Spool Rocking and get better prints
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Adapter to reduce spool rocking for filament spools with tapered center holes - 2 spool hole sizes
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Model information
- Source
- Printables
- Category
- Accessories
- License
- Creative Commons — Attribution
Some filament rolls have a large, tapered hole through the center. This taper makes the spool crawl across the spool arm while you print, and the oversized hole in in the spool makes the filament roll rock back and forth while you print. These rocking and the sliding around can make the extruder body rock forward to back as the spool rocks - ever so slightly - and that makes the extrusion look like toothpaste - not smooth extrusion.
GEEETECH, Sunlu, GIANTARM, and some other Amazon brands that use a tapered hole on their spools so they self jam on the winding machine. But that tapered hole adds to slight print defects ever so slightly as described above. The smoother the pull, the smoother the extrusion line.
These adapters reduce the hole size to 53mm - which is good for many spool arms. My favorite is a bearing mounted roller that bayonets cleanly into the original Prusa spool holder and eliminates print head rocking. Since the spool itself is tapered inside of the center hole, a simple cylinder won't do - it won't eliminate the travel across the arm that the taper causes.
This adapter is sized for the large end of the taper, and then self fits to the taper. It has an untapered center hole, and the size will slip over the wide end of the spool arm on the Smooth Roller arm. Note - Try putting the adapter into the spool from both sides and find the tightest fit - it is tapered ever so slightly. The adapter will fit into either side, but for best effect, find the tighest fit.
This is the spool holder that I print 2x for every printer I have. → Smooth Roller for Mk3s (updated) by Dan Rogers | Download free STL model | Printables.com
Printing Instructions for Tapered Spool Adapter:
Printing is easy. Any material is ok. The slots in the side provide the flexibility No support required. You want the reverse collet shape to be bendable but somewhat stiff, so it grips the spool. Infill %, Infill style, and # of perimeters will be what you use to adjust the stiffness.
Two sizes for the two spool types that have very large center holes.