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What is a cam

A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion. It is often a part of a rotating wheel ( e.g. an eccentric wheel) or shaft (e.g. a cylinder with an irregular shape) that strikes a lever at one or more points on its circular path. The cam can be a simple tooth. A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part. Contents. [hide]. 1 History; 2 Uses. Automotive. Materials; Timing; Duration; Lift; Position; Number of camshafts; Maintenance; Alternatives; Ignition systems. Electrical. 3 Gallery; 4. PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET. Have you ever looked closely at a simple mechanical toy? If you have the opportunity to study one closely you will see that it is made up of mechanisms, usually including CAMS. Can you name any mechanical devices that use cams as part of its movement?.

If you have read the article How Car Engines Work, you know about the valves that let the air/fuel mixture into the engine and the exhaust out of the engine. The camshaft uses lobes (called cams) that push against the valves to open them as the camshaft rotates; springs on the valves return them to their closed position. A camshaft is a rod which rotates and slides against a piece of machinery in order to turn rotational motion into linear motion. This change of motion is accomplished by the camshaft moving further and closer from the axis of rotation as the camshaft is pushed by the machinery. These moving pieces of the shaft are the cams. A mechanism is simply a device which takes an input motion and force, and outputs a different motion and force. The point of a mechanism is to make the job easier to do. The mechanisms most commonly used in mechanical systems are levers, linkages, cams, gears, and and pulleys. You need to know how to calculate the.

21 Sep An easy-to-understand introduction to how cranks and cams turn rotary motion into back-and-forth motion.

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