These are the cams you can use in a mechaanical toy.The first is a conventional circle wood with a follower and make a toy go down-up or turn 360degrees upwards.The next one is a pear shaped cam which works basically the same as the coventional cam except that it only moves up and down but the motion is smoother than the conventional one. The third is a triangular cam which works the same as the pear-shaped one.
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