Overview of Singleturn Absolute Encoders and Multiturn Absolute Encoders

Singleturn absolute encodersOverview with multi-turn absolute encoders

Singleturn absolute encodersIn order to measure the various engraved lines of the optical code disk in rotation to obtain the code of *, when the rotation exceeds 360 degrees, the code returns to the origin, so that it does not conform to the principle of absolute coding *, such an encoder can only be used for measurements within the rotational range of 360 degrees, known as a single-turn absolute value encoder.

If you want to measure the rotation more than 360 degree range, you have to use multi-turn absolute encoder. Encoder manufacturers use the principle of clock and watch gear machinery (the basic law), when the center code disk rotation, through the gear drive another set of code disk, in the single-turn code on the basis of an increase in the number of laps of the code, in order to expand the encoder's measuring range, such an absolute encoder is known as a multi-turn absolute encoder, which is likewise determined by the mechanical position of the code, each position code * does not repeat without the need to memorize.

Another advantage of multi-turn encoder is due to the large measuring range, the actual use of often richer, so that the installation is not necessary to find the zero point of effort, will be a certain intermediate position) as the starting point can be, and greatly simplifies the installation and commissioning difficulties. The signal output of the rope displacement sensor is divided into digital signal output and analog signal output, digital output type can choose incremental rotary encoder, absolute encoder, etc., the output signal for the square wave ABZ signal or Gray code signal, the stroke can be done up to 10,000 mm, the maximum linearity accuracy of 0.01%, the resolution according to the different configurations of the maximum can be up to 0.001 mm / pulse.

SSI signal converter display through the coupling and other coupling parts will encoder shaft and the drum shaft or pinion shaft coupling, so that the encoder and the measured shaft synchronous rotation, the measured shaft rotation into the encoder shaft rotation, through the special tester to collect the encoder value so as to accurately measure the displacement of the measured parts. And achieve the purpose of real-time measurement and control of the displacement of the measured parts. Suitable for all kinds of winch, screw starter gate lifting height measurement.SSI signal conversion display is composed of absolute value rotary encoder, automatic cable device or other forms of coupler, display, controller, transmission cable, RS485 digital communication interface and other components, gate movement through the coupler driven sensor rotation, you can output and gate position corresponding to the Gray code encoded signal.

Multi-turn absolute encoders have clear advantages in length positioning and have been increasingly used in industrial positioning.