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Creating Pendulum Motion

  1. Jan 5, 2009 #1
    Hi I want to build an upsidedown pendulum. My problem is what is the best/most used way of converting a circular motion (from the motor) to a pendulum motion.

    Thanks
     
  2. jcsd
  3. Jan 5, 2009 #2

    mgb_phys

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    Look up 'escapement' there have been lots of different ones invented over the years.
     
  4. Jan 6, 2009 #3
    Neat upside down pendulum using magnetic kids toys:

    http://www.youtube.com/watch?v=5Hhq-XFPAB0&feature=PlayList&p=243BBDADD65207C0&index=0&playnext=1

    Not sure if that's the kind of thing you are looking for, but certainly worth the visit. Also you could do the same sort of thing with electromagnets and a magnetic pendulum. Then it would be self sustaining. Hmmm. Think I have an idea for my next project.
     
  5. Jan 6, 2009 #4

    minger

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    It may be a little easier to build a simple crank-slider assembly, shown here:
    http://en.wikipedia.org/wiki/File:Slidercrank_animation.gif

    All you then need to do is connect the slider to another joint, which has a fixed pivot point. Then adjust your lengths to get the speed/angle sweep that you desire.
     
  6. Jan 6, 2009 #5
    Thanks the 'simple crank-slider assembly' was exactly what I was thinking of.
     
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