Geneva Mechanism

by xlRadioActivelx, published

Geneva Mechanism by xlRadioActivelx Aug 1, 2017
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5771Views 1866Downloads Found in Engineering


The Geneva Mechanism designed by Angus from Makers Muse, I modified it to be fully 3D printable, no hardware required, although some sanding might help it run smoother.

The Geneva mechanism an elegant way to translate continuous rotation into intermittent motion. It’s classically used for movie projectors and is responsible for that iconic sound they make. It’s also used occasionally for indexable machines and CNC tool changing, and in some mechanical watches.
Wiki link: https://en.m.wikipedia.org/wiki/Geneva_drive
(Note: I changed the crank after test printing, so it should fit better and be easier to use)

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.1 or .2




You should only need supports for one of the parts, and you could probably use a lower resolution and still have the mechanism function just fine.

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Might help if a clue was given as to whatinhell this thing does?

Well this model is just a demonstration, the main gear turns intermittently rather than continuously, this has various applications but has mostly been outdated by far more efficient and robust electrical motors (steppers and servos) for more info I would highly recommend this video: https://youtu.be/Le-PVXUCl0M

Thanks, but I think my question was more general and lower level. Basically -- what is a Geneva Mechanism? What does it do? Why might i print one?

No criticism intended, I just thought the posted design was assuming a lot of foreknowledge by the reading public.

I see your point, I’ll add some info to the description for anyone who’s curious about it.

Take a look at the 3D renders for the sides, when I printed this it appears that it is almost as if I got 2 right sides so to speak. All I am saying is that the renders do not match what you have on your print bed. It still works but one of the sides goes on flipped so it doesn't look that good.

did you copy makers muse?

Yes as it says in the description, this was designed by makers muse, I modified it slightly to not require hardware to function, with his permission I uploaded the modified version.

The gear wheel must be printed horizontally to produce strength for the pin as opposed to the picture
My print better rotating in one direction than the other I do not know why