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I'm doing a project on Theo Jansen's Mechanism, where I have to modify the mechanism. What is the most efficient way to design these mechanisms? Is there any good software where I can just draw the links and input crank and test out the mechanism? I have used GeoGebra, but it doesn't simulate the mechanism physically, and while using Creo I found that the pin joints often get stuck - like they suddenly fold up and do not move. Also, creating the links one by one takes quite a lot of time.

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3D CAD software has a hard time with lots of pin connections, because without a range limitation the solution is indeterminate. I have not used Creo, but if you can limit the range of motion with interference or other, the model may work.

Working Model 2D is nice for designing mechanisms. I used it as a student; not sure how much it costs commercially.

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  • $\begingroup$ Looks good. But maybe something with a free student license? I live in India, and due to currency conversion rates, 25 dollars is worth a lot of money here. $\endgroup$ – pca363 Sep 12 '17 at 5:51
  • $\begingroup$ You should be able to get Creo to work :-) The following link talks about how to add rotational constraints to pins. community.ptc.com/t5/Additional-Creo-Questions/… $\endgroup$ – ericnutsch Sep 12 '17 at 6:19
  • $\begingroup$ Thanks. Although it still doesn't work in Creo for me, I got it to work on Solidworks :) $\endgroup$ – pca363 Sep 12 '17 at 6:27

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