WOLFRAM|DEMONSTRATIONS PROJECT

Designing Four-Bar Linkages

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explanation
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play with it!
move linkage
length of arm DB
marker position
The four-bar linkage can be regarded as a basic mechanism. Although simple, the equations describing its dynamic are far from simple and form an important topic in mechanical engineering. This Demonstration shows the steps to construct the Fermat linkage, which is a particular four-bar linkage used to draw a lemniscate of Bernoulli. You can also change the position of a marker and the length of one of the arms.