Servo encoder is a kind of sensor installed on the servo motor, used to measure the magnetic pole position and the rotation angle and speed of the servo motor. According to the different physical media, servo encoders can be divided into photoelectric encoders and magnetoelectric encoders. The resolver is a servo encoder. Classification according to the engraving method of the code disc: (Now there are many classification methods for encoders, let's talk about the commonly used classification)
(1) Absolute encoder: There are several concentric code discs along the radial direction on the circular code disc. Each track is composed of transparent and opaque sectors. The sector tree of adjacent code discs is double. The number of code discs is the number of digits of its binary code. One side of the dial is the light source, and the other side has a photosensitive element corresponding to each code disc. When the dial is in different positions, each photosensitive element converts the corresponding level signal according to whether it is illuminated.
(2) Principle of incremental encoder: every time the shaft rotates around the specified unit angle, a pulse signal is sent out (a sine signal is also sent out, and then subdivided and chopped into higher pulses), usually A, b , C three-phase output, A, b two-phase pulse output delayed by 4 cycles, can be judged as positive or negative according to the delay relationship. By using the rising and falling edges of Phase A and Phase B, z can be doubled and quadrupled.
Classified according to the mechanical installation form of the encoder:
(1) Shafts Shafts can be divided into clamping flanges, synchronous flanges, and servo installations.
(2) The bushing type can be divided into half hollow type, full hollow type and large diameter type
Weihai encoders are mainly used for CNC machine tools and mechanical parts, robots, automatic assembly machines, automatic production lines, elevators, textile machinery, sewing machinery, packaging machinery (fixed length), printing machinery (synchronous), woodworking machinery, plastic machinery (fixed number) , Rubber and plastic machinery, draftsman, goniometer, recuperation radar, etc.