Servo Motor Encoder-Hollow Servo

Encoder

An encoder is a device that compiles and converts a signal (such as a bit stream) or data into a signal form that can be used for communication, transmission and storage. The encoder converts angular displacement or linear displacement into electrical signals. The former is called a code wheel and the latter is called a code ruler. Encoders can be divided into contact type and non-contact type according to the reading mode; encoders can be divided into two types: incremental and absolute according to the working principle. The incremental encoder converts the displacement into a periodic electric signal, and then converts this electric signal into a counting pulse, and the number of pulses is used to indicate the magnitude of the displacement. Each position of the absolute encoder corresponds to a certain digital code, so its indication is only related to the start and end positions of the measurement, and has nothing to do with the middle process of the measurement.

Classification of encoders

According to the working principle, the encoder has optical, magnetic, inductive and capacitive working modes. According to its scale method and signal output form, encoders are generally divided into three types: incremental, absolute and hybrid.

1. Incremental encoder Incremental encoder directly uses the principle of photoelectric conversion to output three sets of square wave pulses A, B and Z phase; the phase difference between the two sets of pulses A and B is 90 degrees, so that the direction of rotation can be easily judged , And the Z phase is one pulse per revolution, used for reference point positioning. Its advantages are simple structure, average mechanical life of more than tens of thousands of hours, strong anti-interference ability, high reliability, and suitable for long-distance transmission. The disadvantage is that the absolute position information of the shaft rotation cannot be output.

2. Absolute encoder Absolute encoder is a sensor that directly outputs numbers. There are several concentric code discs along the radial direction on its circular code disc, and each track is composed of light-transmissive and opaque sectors. The sector trees of adjacent code channels have a double relationship. The number of code channels on the code disc is the number of binary digits. On one side of the disc is the light source, and the other side has a photosensitive element corresponding to each code channel. When the disc is in different positions, each photosensitive element converts the corresponding level signal according to whether it receives light or not to form a binary number. The characteristic of this kind of encoder is that it does not need a counter, and can read a fixed digital code corresponding to the position at any position of the shaft. Obviously, there must be N doctrines. At present, there are 16-bit absolute encoder products in China.

3. Hybrid absolute encoder The hybrid absolute encoder outputs two sets of information, one set of information is used to detect the magnetic pole position, with absolute information function; the other set is exactly the same as the output information of the incremental encoder.

okplazas.com is a high-tech enterprise integrating R&D, production and sales of industrial encoders and high-precision couplings. The main products of the company are encoder and coupling series. There are five series of encoders: absolute series, economic series, industrial universal series, precision enhanced series, magnetoelectric series; couplings mainly include plum-shaped couplings, diaphragm couplings, and expansion sets Shafts, universal couplings, cross slide couplings, etc.

The company's products strictly implement ISO9001 quality management system standards, fully implement ERP enterprise resource data information management, and have passed CE certification and ROHS certification. Strength casts brand, professional achievement quality. The business philosophy of "learning, innovation, and service" is market-oriented, focusing on customer needs, through technological innovation, to improve product quality and exceed customer expectations, and wholeheartedly provide users with first-class products and services.