Cam 1 reciprocates in fixed guides B-B and has profiled groove d. Follower 3 reciprocates in fixed guide A and carries roller 2 which rolls and slides along groove d. The theoretical, or pitch, curve a of groove d is a sine curve. Thus, in translational motion of cam 1, follower 2 reciprocates according to the equation y=C*sin(x) where C is the total amplitude of the sine curve. Positive motion is achieved because the diameter of roller 2 equals the width of groove d.
$3027$SmC,3L$