Rotary optical encoder design trends 4！

Rotary optical encoder design trends

Photoelectric encoder is a mechanical motion control measure rotational body position (angle) and speed sensor, it has two kinds of rotary and linear, wherein the rotary optical encoder due to high precision, easy installation, has been widely used. With the rapid development of motion control products, China's demand for high-precision encoders big, but mainly rely on imports. Currently, active in the market of the encoder is mainly foreign, such as Germany Heidenhain (Heidenhain), Mel (Meyle), Fuchs (P + F), Turck (Turck), USA (GPI), Japan Tamagawa, Renishaw (Renishaw), Korea (Metronix), Autonics (Autonics), Fort Union, Switzerland (Baumer), Turkey (OPKON), as well as our CIMIC like. Throughout recent years, rotary optical encoder of development, its design trends include the following four aspects to elaborate.

Fourth, a variety of signal transmission and interface design. Absolute encoder outputs may be parallel or may be serial. For one of the few absolute optical encoder generally applicable to parallel output, this interface circuit is simple, and the communication rate is high. However, parallel multi-core cable output requires expensive than a serial cable, and the transmission distance is limited, so the multi-digit, high-precision encoder multi-serial output. The encoder can be used for a serial bus with a dedicated bus and common bus, special bus interfaces such as general encoder design uses SSI (synchronous serial interface), BISS (bidirectional digital sensor interface), DRIVE-CLIQ (Siemens-specific), ENDAT (HEIDENHAIN R & D, Fuchs, B & R, Beckhoff and other companies use), Hiperface (Hong Kong companies such as Bosch Rexroth adoption). General industrial bus interface, formerly RS-422/485, and now design and real-time Ethernet fieldbus will become the trend, such as Fuchs, Baumer encoders and other companies design using AS-i, CANopen, DeviceNet, Profibus DP and other fieldbus and POWERLINK, PROFINET, EtherCAT real-time Ethernet. (End)

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