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Projection of a moving point on a line




Projections Bx and By of a point B moving along any curve (in green) on horizontal and vertical axes can be obtained thanks to a pantograph (for horizontal axis in this mechanism) or two slider mechanism (for vertical axis in this mechanism).

Length of blue bars: a + a.

Length of green bars: a.

The green curve is created by a slider crank mechanism (in grey).




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