Input: pink eccentric cam (cam of constant width).
The blue follower linearly reciprocates.
The yellow follower has planar motion: circular translation. Each point on it traces a circle (in green). Its radius = cam eccentricity.
STEP files of this video:
http://www.mediafire.com/download/y8r94t8waadaqa2/Cam2FollowerSTEP.zip
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