Encoders for University Scientific Research
Encoders for University Scientific Research
The encoder for scientific research in colleges and universities consists of a photoelectric code disc with a shaft in the center, on which there are ring-shaped, dark engraved lines, and photoelectric transmitting and receiving devices to read, to obtain four sets of sine wave signals combined into A, B, C, D , Each sine wave has a phase difference of 90 degrees (relative to a cycle of 360 degrees). The C and D signals are reversed and superimposed on the A and B phases to enhance the stable signal; in addition, output a Z-phase pulse per revolution To represent the zero reference position. Since the phases A and B differ by 90 degrees, the encoder's forward and reverse rotation can be judged by comparing the phase A or the B phase. The zero reference position of the encoder can be obtained through the zero pulse.
The materials of encoder code discs for university scientific research are glass, metal, and plastic. The glass code disc is made of thin engraved lines deposited on the glass, which has good thermal stability and high precision. The metal code disc is directly engraved with pass and no pass. Not fragile, but because metal has a certain thickness, the accuracy is limited, and its thermal stability is an order of magnitude worse than that of glass. Plastic code discs are economical, and their cost is low, but accuracy, thermal stability, and life are all It's worse.
Resolution—The number of open or dark engraved lines provided by the encoder for scientific research in colleges and universities per 360 degrees of rotation is called resolution, also known as resolution indexing, or directly called the number of lines, generally 5~10000 lines per revolution.
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