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.
An encoder is a sensor of mechanical motion that generates digital signals in response to motion. As an electro-mechanical device, an encoder is able to provide motion control system users with information concerning position, velocity and direction. There are two different types of encoders: linear and rotary.
Encoders are controlled through the rotation the shaft it is mounted to. The shaft comes into contact with a hub which is in internal to the encoder. As the shaft rotates, it causes the disc, with both transparent and solid lines, to rotate across the circuitry of the encoder.