meal, repast(noun) the food served and eaten at one time. meal(noun) any of the occasions for eating food that occur by custom or habit at more or less fixed times. meal(noun) coarsely ground foodstuff; especially seeds of various cereal grasses or pulse.
Encoders turn mechanical motion into an electrical signal that is used by the control system to monitor specific parameters of the application and make adjustments if necessary to maintain the machine operating as desired.
For example, an incremental encoder with a single code track, referred to as a tachometer encoder, generates a pulse signal whose frequency indicates the velocity of displacement. However, the output of the single-channel encoder does not indicate direction.To determine direction, a two-channel, or quadrature, encoder uses two detectors and two code tracks. The most common type of incremental encoder uses two output channels (A and B) to sense position.Using two code tracks with sectors positioned 90 out of phase, the two output channels of the quadrature encoder indicate both position and direction of rotation.he most popular type of encoder is the optical encoder, which consists of a rotating disk, a light source, and a photo detector (light sensor). The disk, which is mounted on the rotating shaft, has patterns of opaque and transparent sectors coded into the disk (see Figure 1).