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I'm looking to make something like a paint shaker - but I'm wanting to create perfectly rotational reciprocating motion. The picture below shows what I've been considering. The interface could be a problem, especially after a bit of use. I'm just wondering if anyone had a better way of doing it? enter image description here

Many thanks,

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  • $\begingroup$ Check out Scotch Yoke. $\endgroup$
    – Solar Mike
    Feb 28 at 13:34
  • $\begingroup$ @SolarMike That's essentially the same mechanism as above. In any case, it converts rotary to linear reciprocation. I need rotary to rotary reciprocation $\endgroup$
    – Oliver Walters
    Feb 28 at 13:39
  • $\begingroup$ No, it's not. but fine. $\endgroup$
    – Solar Mike
    Feb 28 at 13:48
  • $\begingroup$ Scotch yoke is a cam mechanism and you have a bar mechanism. But why not use a crank rocker fourbar mechanism whisc is what jstola is showing. $\endgroup$
    – joojaa
    Feb 28 at 19:39
  • $\begingroup$ "I'm wanting to create perfectly rotational reciprocating motion" That's easy -- it can't be done, at least not in this universe. Please edit your question to explain what is adequate for you. $\endgroup$
    – TimWescott
    Mar 3 at 4:02

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Something like this would work.

enter image description here

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  • $\begingroup$ you may want to tell how to dimension this $\endgroup$
    – joojaa
    Feb 28 at 19:42
  • $\begingroup$ @joojaa that would be dependent on the actual application ... the question is specifically about converting motion ... no idea if it is actually about a paint shaker $\endgroup$
    – jsotola
    Feb 28 at 21:30

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