Cam 1 rotates about eccentrically located fixed axis A and its contour is a circle of radius r. Follower 2 reciprocates in fixed guide c and has flat surface f-f tangent to the contour of cam 1. When cam 1 rotates, follower 2 has harmonic motion according to the equation s₂=k*cos(φ) where s₂ is the displacement of follower 2; k is the distance A͞B (or eccentricity) of cam 1 and φ is the angle between line AB and axis Ax. The corresponding velocity and acceleration of the follower are v₂=-ω₁k*sin(φ) and a₂=-ω₁²k*cos(φ) and the full stroke of the follower os S₂=2k where ω₁ is the angular velocity of cam 1, taken to be constant. Follower 2 is held in contact with cam 1 by spring 3.
$3021$SmC,3L$