this post was submitted on 25 Apr 2024
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After half a dozen iterations, this was the first reasonably working, acceptable feeling, and good-sounding ratchet mechanism.

allows clockwise rotation blocks counterclockwise rotation

design features:

  • allows for a large inner bore (e.g. rotary encoder shaft or 5.2mm screwdriver bit)
  • printable with 0.4mm nozzle
  • 2cm diameter
  • no assembly required. Print in place.

To get a full ratchet: mirror the assembly and add a mechanism/part that pushes one of the springs out. In neutral both leavers are engaged and the ratchet is completely locked.

Btw. Good luck copying it without going through half a dozen of iterations. Going from it barely works to this isn't easy. For my part: Version 5 was working and close to the final design. It took another 10 rounds to get it usable and from there some more to fine-tune it.

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[–] Excrubulent@slrpnk.net 13 points 2 months ago (1 children)

Then post the parametrised step file so people can tinker themselves.

That said, if you did all this work and went through all these iterations to make a single ratchet that nobody else can copy then it sounds like you massively wasted your time. I would far prefer something with a tiny bit of assembly to a print-in-place gimmick that takes far more effort. The only way this makes any sense is if you're making a lot of them.

I guess keep it to yourself in that case.