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The purpose and detail of implementation influence whether this application is called a cam or a screw thread, but in some cases, the nomenclature may be ambiguous.
In the most common type, the follower rides in a groove cut into the surface of a cylinder.
These cams are principally used to convert rotational motion to linear motion parallel to the rotational axis of the cylinder.
Face cams may also be used to reference a single output to two inputs, typically where one input is rotation of the cam and the other is radial position of the follower. These were once common is mechanical analog computation and special functions in control systems.
A face cam that implements three outputs for a single rotational input is the stereo phonograph, where a relatively constant lead groove guides the stylus and tone arm unit, acting as either a rocker-type (tone arm) or linear (linear tracking turntable) follower, and the stylus alone acting as the follower for two orthogonal outputs to representing the audio signals.
Non-invertible functions, which require the groove to self-intersect, can be implemented using special follower designs.
A variant of the face cam provides motion parallel to the axis of cam rotation.
Thus, in practice, the points at which lift begins and ends mean that a tangent to the base circle appears on the profile.
This is continuous with a tangent to the tip circle.
Instructions for producing programming cams and cam generation data for the most common makes of machine were included in engineering references well into the modern CNC era.
A cylindrical cam or barrel cam is a cam in which the follower rides on the surface of a cylinder.
A simple displacement diagram illustrates the follower motion at a constant velocity rise followed by a similar return with a dwell in between as depicted in figure 2.Tags: Adult Dating, affair dating, sex dating