Sunlu S4 anti-tilt spool cradle
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Stop your spools from tilting and tangling!
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Model information
- Source
- Printables
- Category
- Accessories
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Two nights in a row, I woke up to my printer printing in mid-air 😪 Both times, the cause was a near-empty spool tilting on the Sunlu S4 rollers, causing a tangle up against one side of the spool.
Here is my solution: a 2-piece cradle that stabilises a standard 1kg spool both side-to-side (with wider roller spacing) and front-to-back. There are 2 main versions:
- With guide rails for spools up to 68mm wide (Polymaker, Bambu, eSun)
- Without guide rails for thicker spools up to 77mm (Prusament)
The cradle consists of 2 identical halves, so you need to print 2 to make 1 cradle. Recommend 0.20-0.25mm layer height, with 2-3 perimeters, no supports. There are 2 versions with different size holes for the roller bearings, 12.1mm was a perfectly snug fit for me, but if that's too tight, there's also a 12.2mm version.
Assembly
- Pull the 2 rollers out of the bay you want to upgrade
- On a flat surface, push the rollers into one of the cradle halves until they bottom out
- Invert the assembly and push the other ends into the other half
- Secure the cradle legs together with 2x M5 machine screws (10mm thread) and 2x M5 nuts
- If you don't have 10mm screws, you can insert an M5 hex bolt up from the bottom, and tighten a nut on top instead