HAECO encoder

The HAECO encoder consists of a photoelectric code disk with a shaft in the center, on which there are circular and dark engraved lines, and is read by photoelectric transmitter and receiver devices to obtain four groups 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, a Z-phase pulse is output per revolution. Represents 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 HAECO encoder code discs 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. It is not easy to directly engrave the metal code disc with and without pass. But because the metal has a certain thickness, the accuracy is limited, and its thermal stability is an order of magnitude worse than that of glass. The plastic code disc is economical, and its cost is low, but the accuracy, thermal stability, and life are required. Worse.

Resolution—The number of open or dark engraved lines provided by the HAECO encoder per 360 degree rotation is called resolution, which is also called resolution indexing, or directly called the number of lines, generally 5 to 10,000 lines per revolution.

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