Ball detent mechanism
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Ball detent mechanism; the sort you'd find in a rotary switch
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- Printables
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- Engineering
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- Creative Commons — Attribution
The ball detent mechanism allows you to build rotary switches that “latch” to specific positions. You would normally find this in all kinds of rotary switches like fan regulators, for example. This model provides six detents, which means each detent is separated by 60 degrees of rotation.
The assembly is printable in 4 pieces. You should use a 6mm ball bearing if you have one. If not, you can print one using the supplied file but the detent action may not be as smooth as you'd like, depending on how well your printer works. The assembly is self-explanatory – stick the detent in one part of the housing and then close the housing with an M3 screw and nut. Drop a ball bearing or your 3d printed ball into the top of the housing and hold it in with a 5.5 x 7.5mm screw (not included).
The model is purely for demonstrative purposes and does not have a cap to hold the spring in place. I will iterate on this in the future as I build this up to be a full fledged switching mechanism.