Absolute encoder output types can be broadly divided into analog and digital signals, most now come with their own digital module, which can save some cost of use, the choice of output type is not repeated under this topic. The number of turns is calculated by the gear set and the single-turn position is reflected on the code plate. For perpetual rotation in one direction, a single-turn encoder is selected and the number of turns is added up in the program. How accurately the encoder measures the position of the motor lies in how much the encoder code plate reads. The commonly used encoder code plate is 12 bits, i.e. 4096 quarters per revolution, these quarters is different from the pulse resolution of the pulse encoder, each quarter per revolution of the absolute encoder is a unique position, the angle of rotation is converted into an analog or digital quantity by the encoder integration signal and sent to the host computer.

 

 

Encoders occupy an extremely important position in lifts, machine tools, material processing, motor feedback systems as well as in measuring and control equipment. Encoders use grating and infra-red light sources to convert the optical signal into an electrical signal in TTL (HTL) via a receiver. By analysing the TTL level frequency Q and the number of high levels, the angle of rotation and the rotational position of the motor are visualised.
As both angle and position can be measured precisely, the encoder and inverter can be formed into a closed-loop control system9 , making control even more precise, which is why lifts, machine tools etc. can be used so precisely.

 

In summary, we understand that encoders are divided by structure into incremental and absolute types, both of which also convert other signals, such as optical signals, into electrical signals that can be analysed and controlled. The common lifts and machine tools in our lives all happen to be based on the precise adjustment of the motor, which is controlled by feedback closed-loop of the electrical signal, and it is only logical that encoders with frequency converters achieve precise control.