Interlock mechanism for winder spool gear/spindle axles - Filament Spool Rewinder
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Locking mechanism between the gear and main spindle axle for the winder spool to prevent slipping.
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- Source
- Printables
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- Other Printer Parts & Upgrades
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- Creative Commons — Attribution — Noncommercial — Share Alike
I tested several different main spindles for the awesome filament spool rewinder project. The main issue I found with these is that they put one flat surface onto another and rely on axial pressure to prevent slipping. Inserts work better, yet still rely on a relatively small surface area to transfer all the rotational torque, I spun a few of those out of the spindle before designing an alternate solution.
I created an interlocking mechanism between the gear and spindle pieces that locks them together and spreads out the rotational torque across more surface area. Add as a part to Bearing Spindle Part1 and a negative volume to Bearing Spindle Part2, relative positions for both are in the photos section.
I printed in ABS, 0.2mm layer height, the parts fit well together. Four wall loops, 25% Gyroid infill may not be needed, this is my standard and I did not test other parameters. My printers are fairly well calibrated, if yours are not as accurate, you may need to do some X-Y contour compensation. The M5 screw also pushes the posts out a bit, further enhancing the positive lock.