Converting Circular Motion to Pendulum Motion: The Simple Crank-Slider Assembly

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Discussion Overview

The discussion revolves around methods for converting circular motion from a motor into pendulum motion, specifically in the context of building an upside-down pendulum. Participants explore various mechanical systems and concepts related to this conversion.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks advice on the best method to convert circular motion to pendulum motion for an upside-down pendulum.
  • Another participant suggests researching 'escapement' mechanisms, noting that many variations have been developed over time.
  • A different participant shares a link to a video demonstrating a magnetic upside-down pendulum and proposes the idea of using electromagnets for a self-sustaining system.
  • Another suggestion involves using a simple crank-slider assembly, providing a link to an animation and describing how to connect it to a fixed pivot point to achieve the desired motion.
  • A later reply expresses satisfaction with the crank-slider assembly as a suitable solution.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a single method, as multiple approaches are discussed, including escapements, magnetic systems, and crank-slider assemblies.

Contextual Notes

The discussion does not clarify specific assumptions or limitations regarding the mechanical designs or their feasibility in practical applications.

Who May Find This Useful

Individuals interested in mechanical design, robotics, or physics projects involving motion conversion may find this discussion relevant.

chris2547
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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
 
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Look up 'escapement' there have been lots of different ones invented over the years.
 
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.
 
Thanks the 'simple crank-slider assembly' was exactly what I was thinking of.
 

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