Here is a flash animation of Hoekens Linkage. The Hoekens linkage is a four bar mechanism
that converts rotational motion to approximate straight-line motion.
the only thing this sim does not have is the ability to move the fulcrum of the blue lever bar (limited to middle). HINT: the ends of the grey bar can be moved, to change behaviour or to keep the simulation in view.
...And the sim doesn't like excessive acceleration (but because of that, it can indicate the forces exerted). The grey bar length can replace the need to adjust the fulcrum.
Add a comment or brief description of this mechanism in your language.
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