Rotary optical encoder design trends！

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.

First, the design of new products. The first is the development of group products, the encoder manufacturers to design, production incremental encoders and single-turn absolute rotary encoders are mostly recent years with the expansion of application fields, design multi-turn absolute encoder with mixed encoder increased. Tamagawa launched as a hybrid encoder comprising incremental encoder signal and outputs 24 coded single turn absolute encoder with magnetic positioning function, when used in servo motion control, can quickly detect the servo motor rotor pole position angle, especially for high-power servo motor can raise the initialization of positioning accuracy, and can increase the output torque of the servomotor, while the position control and velocity calculations are extremely convenient. Followed by the design of specific products. For example, CIMIC (Delta Group) special designed CNC incremental encoder and servo motor dedicated encoder, the new CNC spindle-specific CS7 series encoders, the compact design of the structure, small size, resolution to 1024p / r, using line driver output, speed raised to 8000r / min, and thus can be used with high-speed frequency spindle machine tool industry, the output signal in response to 300KHZ, can improve the overall response speed of this system to achieve high-precision control Claim. To Branch (Tianjin) Electronics designed the elevator-specific encoders and heavy with heavy-duty incremental encoders, which allegedly using the latest European electrical and mechanical design technology, so that it can withstand the maximum axial load of 80N the maximum radial load is 150N, the maximum speed of 6000r / min, the bearing life of 109 rpm, temperature 20 ~ 90 ℃. Fuchs In view of the huge potential market for wind power generation, wind power generation is designed encoder. Fuchs, Turck, etc. also designed explosion-proof encoders, with 3 categories of products:

(1) EExd flameproof, this type of encoder design rugged, natural gas, if it can enter the encoder is spark ignited an explosion, the flame is confined within the casing, the crisis is not external environmental safety;

(2) EExi intrinsically safe, this encoder is designed to limit current and voltage of the circuit, so that any spark or thermal effect generated by the circuit can not ignite explosive gas environmental regulations;

(3) EExna non-sparking, which is the latest technology explosion, this technical design of the encoder during normal operation does not produce sparks and arcing, so as to ensure environmental safety.

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