Ball Bearing Supported Spool Holder for Elegoo Centauri Carbon

This a ball bearing supported filament spool holder for the Elegoo Centauri Carbon to optimize filament feed with both very soft filaments such as TPU, and can also benefit fiber-filled filament printing such as carbon fiber and glass.

• Big improvement with TPU95 and especially TPU85

• Smoother extrusion during fast infill

• Less under-extrusion on retractions

• Reduced clicking/skipping on direct drive extruder

• Also helps with stiff filaments (PLA+, fiber blends)

Parts required:

1.  Print the Frame, I used PETG-CF,  random seam position, 4 wall loops, 25% gyroid infill, hybrid tree supports (tree hybrid style), and no brim.  I designed-in a 45° chamfer to allow printing with that surface oriented to the plate as shown:
   

   

2. The roller was printed with the same settings.  The roller was the primary reason I selected random seam position to eliminate any induced rotational disturbances created as the spool climbs and falls during rotation.  I had experienced this with an earlier ball-bearing roller design some time back.

   

   3. The pin was also printed with the same settings and material. 
   
    

   

1. Assemble by placing the bearings into the spool, placing the spool into the frame, then carefully align and insert the pin until seated.  You will need to gently lift and nudge the spool while inserting the pin, aligning as you go, first with the bearings then the pin pocket in the frame.  It may be useful to practice inserting the pin into the frame once without the spool to get the feel of it.

      5. This design includes a slot to facilitate pin removal by inserting a small flat screwdriver.

 6.  This ball-bearing spool holder will mount anywhere the OEM Elegoo Centauri Carbon spool holder will         mount.  

       It works well with my overhead spool mount for the Centauri Carbon: