Tube bending machine encoder

The encoder of the pipe bender consists of a photoelectric code disk with a shaft in the center, on which there is a ring-shaped and dark engraved line, and is read by a photoelectric transmitting and receiving device 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, a Z-phase pulse is output per revolution To represent the zero reference position. Since the phases A and B are different by 90 degrees, the encoder's forward and reverse rotation can be judged by comparing whether the A phase is the first or the B phase. The zero reference position of the encoder can be obtained through the zero pulse.

The material of the encoder code disk of the pipe bender includes glass, metal, plastic. The glass code disk is a thin scribe line deposited on the glass, which has good thermal stability and high precision. The metal code disk is directly scribed by the pass and the non-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. The plastic code wheel is economical, and its cost is low, but the accuracy, thermal stability, and life are all It's worse.

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

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