Servo motor encoder installation process

The servo motor encoder is a sensor installed on the servo motor to measure the magnetic pole position and the rotation angle and speed of the servo motor. From the difference of physical media, the servo motor encoder can be divided into photoelectric encoder and magnetoelectric encoder. In addition, the resolver is also a special servo encoder. Different classification according to the engraving method of the code disc: (there are many encoder classification methods, just talk about the commonly used classification)

(1)Absolute encoder: 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 tracks It is a double relationship. The number of code channels on the code disc is the number of binary digits. On one side of the code disc is the light source, and on the other side there is a photosensitive element corresponding to each code channel. When the code disc is in different positions, Each photosensitive element converts a corresponding level signal according to whether it receives light or not to form a binary number.

(2) Principle of incremental encoder: every time the shaft rotates through the specified unit angle, it sends out a pulse signal (also sends a sine signal, then subdivides it, and chopped it to produce higher pulses), usually A, B , C three-phase output, A, B two phases are mutually delayed by 4 cycles of pulse output. According to the delay relationship, the forward and reverse can be judged. By using the rising and falling edges of the A and B phases, the frequency can be doubled and quadrupled. , Phase Z is a single-turn pulse, that is, one pulse is sent out every turn.

Classified by the form of mechanical installation of the encoder:

(1) Shaft type. Shaft type can be divided into clamping flange type, synchronous flange type, servo mounting type, etc.

(2) Sleeve type: The sleeve type can be divided into semi-empty type, full-empty type, and large-diameter type.

Encoder application occasions:

Encoders are mainly used in CNC machine tools and mechanical accessories, 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, drawing instruments, goniometers, convalescent radars, etc.