Draw the labelled displacement, velocity and acceleration diagrams for a follower when it moves with simple harmonic motion.
Roller follower is preferred over knife edge follower Knife-edge of the follower will cause the wear of the cam. Higher load on the small contact area the follower likely to cause wear at the tip of Knifeedge due to more stresses. Knife-edge follower practically not feasible for higher torque / load applications. More friction due to sliding motion of the knife-edge follower and hence, more maintenance. Roller follower on the other hand produces smooth operation with less wear and tear of both cam and follower. Pure rotational motion of roller follower causes less friction and less loss of power. Considerable side thrust exists between knife-edge follower and the guide.