SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING Assume that we are designing a cam with a radial, pointed follower. Assume further that the follower must rise between 0 and 180. We indicate the starting position of the follower by a and the position at 180 by B. The question is now: What path must the follower take from a to B? The simplest path is, of course, a straight line. Since in this case the follower moves equal distances in equal angular displacements, its outward velocity is constant(assuming constant cam rpm)and the cam constructed from such a displacement diagram is called a constant velocity cam. It is clear that at points A and B sudden changes in velocity occur which may be acceptable for light loads and low rpm valuesSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING Assume that we are designing a cam with a radial, pointed follower. Assume further that the follower must rise between 0 and 180º. We indicate the starting position of the follower by A and the position at 180ºby B. The question is now: What path must the follower take from A to B? The simplest path is, of course, a straight line. Since in this case the follower moves equal distances in equal angular displacements, its outward velocity is constant (assuming constant cam rpm) and the cam constructed from such a displacement diagram is called a constant velocity cam. It is clear that at points A and B sudden changes in velocity occur which may be acceptable for light loads and low rpm values