When the incremental rotary encoder shaft rotates, there is a corresponding pulse output. The discrimination of the direction of rotation and the increase or decrease of the number of pulses are realized by the rear direction judgment circuit and counter. The starting point of the counting can be setting freely, and the infinite cumulative and measurement of multiple circles can be realized. When the number of pulses is fixed and the resolution needs to be increased, the original pulse number can be multiplied by using two signals of 90° phase difference A and B.

Rotary encoder is the sensor which could convert the shaft mechanical displacement to digital or pulse signals. On the incremental encoder disc， there are many square holes equally spaced. The rotary encoder could output the pulse signal through the electrical part reading the holes on disc.

Magnetic encoder is mainly including a magnet and a PCB which could read the magnet N and S poles. And then the sensing parts could tell the rotational position information in the form of signal output. Magnetic encoder has the advantages of anti-shock, reliable performance, simple construction. Incremental magnetic encoder is with lower cost than optical encoder. Optical encoder 's resolution depends on the lines on glass disc. The bigger disc, the more lines, the higher resolution. Magnetic incremental encoder can be in high resolution with small size.

Incremental optical encoder is a device converting physical data to digital mode. In the motion control systerm, the function of incremental optical encoder is converting angle and position information to digital pulse signal. The A,B,Z 3 channels output in wave form. Direction and speed can be judged from the 3 channels.

The rotary incremental encoders passed the certification of CE ISO9001 & ROHS and the manufacturer of the incremental encoder has high quality control, better delivery control and better cost control.The rotary incremental encoders are applied to the lift, textile machines, cnc machine tools, packing machines and conveyor industry.

An incremental rotary encoder working principle is provides cyclical outputs (only) when the encoder is rotated. The incremental rotary encoder is the most widely used of all rotary encoders due to its low cost and ability to provide signals that can be easily interpreted to provide motion related information such as position and velocity.

Encoder can be divided into absolute encoder and incremental encoder. Incremental encoder is relatively easier in realizing its function than absolute encoder. Its cost is lower than absolute encoder. The measuring range of incremental optical encoder is one turn(360 degree). After 360 degree, it will start from 0 again. Optical sensor has higher accuracy than magnetic encoder. The optical glass can provide the accurate position feedback.

The incremental optical DC motor encode passes the certification is CE ISO9001 & ROHS and the manufacturer of the sensor has high quality control, better delivery control and better cost control.The hollow shaft encoder apply to the lift, textile machines, cnc machine tools, packing machines and conveyor industry.

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