ocr: PRINCIPLES OF SCIENCE CAMS AND CRANKS AMSA AND CRANKS convert - - Crotation into rectprocating (to-and-fro) motion. A cam is an egg-shaped rotating wheel. Different parts ofits rim are different distances from the center ofrotation, so that a rod resting on CRANK the rim moves up and down as the cam tums. With a crank, the rod is fixed to the wheel, - rie so the crank can also change to-and-fro motion into rotation. CAM. D- "C Cams Cranks Related Machines
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