Brief description of Tongmao voice coil motor (motor) encoder works, Tongmao voice coil motor (motor) should be in the laser cutting equipment industry, semiconductor manufacturing equipment industry, flat panel display industry, printing equipment industry, medical device industry, precision instrumentation industry , Electronic components surface mount equipment industry, PCB testing equipment industry, logistics equipment industry in different fields.
Tongmao voice coil motor (motor) in the specific application is how to do high-precision position control it? Do you know? Some friends know, but some friends do not understand, so today we talk about what makes Tongmao voice coil motor (motor) do in different areas of application of high-precision position control.
Tongmao voice coil motor (motor) to do high-precision position control of the magic in the final analysis is it - the encoder. Then a friend asked what is the encoder? How accurate encoder voice coil motor (motor) position? Let's talk with everyone today.
Encoders are devices that convert signals or data into signals that can be used for communication, transmission, and storage. Encoder angular displacement or linear displacement into electrical signals, the former known as code wheel, the latter known as yardstick (grating ruler). It is commonly used in industry, motor positioning equipment, can accurately test the motor angular displacement and linear position. According to the principle of encoder can be divided into two types of incremental and absolute.
Now let's take a look at the working principle of the Tongmao voice coil motor (motor) encoder. It consists of a central optical encoder with an annular pass, a dark reticle, and a photoemissive and receiver device to obtain four Group of sine wave signals combined into A, B, C, D, each of the sine wave phase difference of 90 degrees (relative to a cycle of 360 degrees), the C, D signal reversed, superimposed on the A, B phase, Can enhance the stability of the signal; the other output a Z-phase pulse per revolution to represent the zero reference bit.
As A, B two phase difference of 90 degrees, by comparing the A phase in front of B or phase in order to determine the encoder forward and reverse, by zero pulse encoder available zero reference bit. Encoder code disc material is glass, metal, plastic, glass code plate is deposited on the glass thin engraved lines, and its thermal stability, high precision, metal code dial directly to pass and engraved, not fragile, However, due to the metal has a certain thickness, accuracy is limited, its thermal stability than glass is an order of magnitude, plastic disc is economical, its cost is low, but the accuracy, thermal stability, life expectancy should be worse .
Resolution - Encoder to pass every 360 degrees to provide the number of pass or dark line called resolution, also known as resolution or directly called the number of lines, usually in each indexing 5 ~ 10000 lines.
Encoders occupy an important place in elevators, machine tools, material processing, motor feedback systems, and measurement and control equipment. Encoder uses grating and infrared light source to convert optical signal into TTL (HTL) signal through the receiver. By analyzing TTL level frequency and high level number, the encoder can directly reflect the rotation angle or linear position of the motor.
Tongmao high-precision voice coil motor (motor) used by the linear encoder resolution of 0.1μm, 0.5μm, 1μm and other options to meet the customer's choice. At the same time to provide standard products and customer OEM products, with industry in the R & D and manufacturing experience, fully meet the high performance, low cost, short lead time, high quality requirements.
This article originates from Kunshan Tongmao Electronics Co., Ltd. (
www.tmmotion.com) original company, please indicate the source.
Linear motor