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Animation showing rotating cams and cam followers producing reciprocating motion.
Animation showing rotating cams and cam followers producing reciprocating motion.

A CAM is a part of a rotating wheel or shaft that strikes a lever at one or more points on its circular path. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer, for example, or an eccentric disc or other shape that produces a smooth reciprocating (back and forth) motion in the follower which is a lever making contact with the cam. For other uses, see CAM. Animation showing rotating cams and cam followers producing reciprocating motion. ... Image File history File links Nockenwelle_ani. ... Image File history File links Nockenwelle_ani. ... For other uses, see Wheel (disambiguation). ... For the Portuguese town and parish, see Lever, Portugal. ... The steam hammer is a power-driven hammer used in forgings. ... Example of using eccentric on steam engine In mechanical engineering, an eccentric is a wheel that rotates on an axle that is displaced from the focus of the circle described by the wheel; in other words, a mechanical motion that can operate either as a cam or a crank, depending...


The cam can be seen as a device that translates movement from circular to reciprocating (or sometimes oscillating). A common example is the camshaft of an automobile, which takes the rotary motion of the engine and translates it into the reciprocating motion necessary to operate the intake and exhaust valves of the cylinders. For the fictional characters of the same name, see Camshaft (Transformers). ... “Car” and “Cars” redirect here. ... A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. ... Cylinder with piston in a steam engine A cylinder in the central working part of a reciprocating engine, the space in which a piston travels. ...


The opposite operation, translation of reciprocating motion to circular motion, is done by a crank. An example is the crankshaft of a car, which takes the reciprocating motion of the pistons and translates it into the rotary motion necessary to operate the wheels. A crank is a bent portion of an axle, or shaft, or an arm keyed at right angles to the end of a shaft, by which motion is imparted to or received from it; also used to change circular into reciprocating motion, or reciprocating into circular motion. ... Crankshaft (red), pistons (gray) in their cylinders (blue), and flywheel (black) Continental engine marine crankshafts, 1942 Components of a typical, four stroke cycle, DOHC piston engine. ... For the American composer, see Walter Piston. ...


Certain cams can be characterized by their displacement diagrams, which reflect the changing position a roller follower would make as the cam rotates about an axis. These diagrams relate angular position to the radial displacement experienced at that position. Several key terms are relevant in such a construction of plate cams: base circle, prime circle (with radius equal to the sum of the follower radius and the base circle radius), and the pitch curve which is the radial curve traced out by applying the radial displacements away from the prime circle across all angles. Displacement diagrams are traditionally presented as graphs with non-negative values. Involute Teeth, ANSI/AGMA 1012-G05 In mechanical engineering, base circle of an involute gear is the circle from which involute tooth profiles are derived. ... Prime Circle is one of South Africa’s most popular rock bands and is currently based in Witbank, Mpumalanga. ...


See also


  Results from FactBites:
 
What Is CAM? (1680 words)
CAM is a group of diverse medical and health care systems, practices, and products that are not presently considered to be part of conventional medicine.
While some scientific evidence exists regarding some CAM therapies, for most there are key questions that are yet to be answered through well-designed scientific studies--questions such as whether these therapies are safe and whether they work for the diseases or medical conditions for which they are used.
The list of what is considered to be CAM changes continually, as those therapies that are proven to be safe and effective become adopted into conventional health care and as new approaches to health care emerge.
CAM - Hutchinson encyclopedia article about CAM (417 words)
The edge cam in a car engine is in the form of a rounded projection on a shaft, the camshaft.
A face cam is a disc with a groove in its face, in which the follower travels.
The Cam is joined at Hauxton by the River Granta, which rises in Essex, and is known thereafter as either the Cam or the Granta.
  More results at FactBites »

 
 

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