Circular cams are mechanical devices used to convert rotational motion into linear motion. They consist of a circular disc with a specific profile or shape cut into its edge. As the cam rotates, a follower, which is a component that rides on the cam's surface, moves up and down according to the cam's shape. This motion can be used in various applications, such as in automotive engines or printing presses. The design of circular cams allows for precise control of the follower's movement, making them essential in machinery where timing and positioning are critical. Different cam profiles can produce various motion patterns, enabling engineers to tailor the performance of machines to specific tasks. Circular cams are commonly found in mechanical clocks and automated assembly lines.