The Rotary Encoder Can Count the Number of Output Pulses during the Rotation of the Positive Direction and the opposite Direction through Rotation. the Rotation Count Is Not like Potentiometer, and This Rotation Count Is Unlimited. With the Button on the Rotary Encoder, It Can Be Reset to the Initial State, That Is, Counting from 0.
Incremental Encoder Is a Rotary Sensor That Converts Rotary Displacement into a Series of Digital Pulse Signals. These Pulses Are Used to Control Angular Displacement. The Conversion of Angular Displacement in Eltra Encoder Adopts Photoelectric Scanning Principle. The Reading System Is Based on the Rotation of Radial Dividing Disc (Code Plate) Composed of Alternating Light-Transmitting Windows and Opaque Windows, and Is Vertically Illuminated by an Infrared Light Source at the Same Time, light Projects the Image of the Code Disk onto the Surface of the Receiver. The Receiver Is Covered with a Layer of Diffraction Grating, Which Has the Same Window Width as the Code Disk. The Work of the Receiver Is to Feel the Changes Caused by the Rotation of the Disc, and Then Convert the Light Changes into Corresponding Electrical Changes. Then, the Low-Level Signal Rises to a Higher Level and Generates a Square Pulse without Any Interference, Which Must Be Processed by Electronic Circuits. The Reading System Usually Adopts Differential Mode, Which Compares Two Different Signals with the Same Waveform but 180 ° Phase Difference, So as to Improve the Quality and Stability of the Output Signal. The Reading Is Formed on the Basis of the Difference between the Two Signals, Thus Eliminating the Interference.