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.
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.