Type rotary photoelectric encoderDue to its position *, anti-interference, and no need for power-off memory, it has been increasingly widely used in angle and length measurement and positioning control in various industrial systems.

　　encoderThere are many engraved lines on the optical encoder, each engraved line is sequentially marked with 2 lines, 4 lines, 8 lines, 16 lines...... Arrange, in this way,
At each position of the encoder, by reading the brightness and darkness of each engraved line, a set of binary codes (Gray codes) ranging from the zero power of 2 to the n-1 power of 2 is obtained, which is called an n-bit encoder. This encoder is determined by the mechanical position of the encoder disc and is not affected by power outages or interference. The encoder is determined by the mechanical position of each position, and it does not require memory, reference points, or continuous counting. It reads its position whenever it needs to be known. In this way, the anti-interference characteristics of the encoder and the reliability of the data are greatly improved.Due toencoderIt is significantly superior to incremental encoders in positioning and has been increasingly applied in industrial control positioning. Due to its high precision and large number of output bits, if parallel output is still used, each output signal of the encoder must be well connected. For more complex working conditions, isolation is also required, and there are many cable cores connected, which brings many inconveniences and reduces reliability. Therefore, in multi bit output type encoders, serial output or bus output are generally used. SSI (synchronous serial output) is commonly used for serial output of encoders produced in Germany.A rotary single turn encoder is used to measure the lines on the optical encoder disc during rotation, in order to obtain the encoding of *. When the rotation exceeds 360 degrees, the encoding returns to the origin, which does not comply with the principle of encoding *. Such encoders can only be used for measurements within a rotation range of 360 degrees, and are calledSingle loop encoder.If you want to measure rotation beyond 360 degrees, you need to useMulti loop encoder.

Encoder manufacturers use the principle of clock gear machinery. When the central code wheel rotates, another set of code wheels (or multiple sets of gears, multiple sets of code wheels) is transmitted through gears. On the basis of single circle coding, the number of circles is added to expand the measurement range of the encoder. This type of encoder is called a multi circle encoder, which is also determined by mechanical position coding. Each position coding * is not repeated and does not need to be memorized.Another advantage of multi turn encoders is that due to their large measurement range, they often have more flexibility in practical use. This way, there is no need to struggle to find the zero point during installation, and a certain middle position can be used as the starting point, greatly simplifying the difficulty of installation and debugging.Multi loop encoders have obvious advantages in length positioning and have been increasingly applied in industrial control positioning.