What are cam and follower use for?

Cams and followers are mechanical devices used to convert rotary motion into linear motion. The cam, typically a rotating disc or wheel with an irregular shape, pushes against the follower, which moves in a linear path. This mechanism is commonly found in engines, automated machinery, and various manufacturing processes, where precise timing and movement are essential. Cams allow for controlled movement profiles, enabling varied speeds and motions based on the cam's design.