Types of Cams in Engineering

______ may be designed in 2 ways: To assume the required motion To assume the shape CYLINDER CAM – this type of cam finds many applications, particularly on machine tools. Perhaps the most common example, however, is on levelwinding fishing reels. INVERSE CAM - Occasionally. it is advantageous to reverse the role of the cam and the follower and to let the follower drive the cam. This inversion finds application in sewing machines and other mechanisms of similar nature. CAM DISPLACEMENT CURVE If operation is to be slow speed, the motion may be one of several common motions. 3.1 a – shows a disk cam with an in-line knife edge follower. 3.1 b – shows a disk cam with in-line roller follower. Parabolic – constant acceleration and deceleration. Parabolic with Constant Velocity Simple Harmonic Cycloidal 3.1 c – shows a disk cam with an offset roller follower. In Figures a – c, each cam and follower mechanisms and the cam rotate while the follower reciprocates. 3.1 d – shows a disk cam with an oscillating roller follower. 3.1 e – shows a disk cam with a reciprocating Oat-faced follower. 3.1 f - shows a disk cam with oscillating Oat-faced follower. POSITIVE-RETURN CAM – with a disk cam and radial follower, it is often necessary to return the follower in a positive manner and not by the action of gravity or of a spring. This type of cam may also be designed using two roller followers instead of the flat -faced followers.

What are the two ways a cam may be designed?

In which application is the cylinder cam commonly used?

What type of cam finds application in sewing machines and similar mechanisms?

Which type of cam displacement curve exhibits constant acceleration and deceleration?

For which type of cam is it often necessary to return the follower in a positive manner?