What is the difference between an absolute and incremental encoder?

When it comes to position - sensing devices, absolute and incremental encoders serve distinct purposes with unique characteristics. Understanding their differences can help you make the right choice for your specific application, especially when considering the high - quality offerings from Shanghai Hengxiang Optoelectronics Co., Ltd.

An incremental encoder works by generating a series of pulses as the shaft rotates. These pulses represent the change in position, and the device needs to start from a known reference point and count the pulses to determine the current position. If power is lost, the encoder loses its position information and must be re - initialized. On the other hand, an absolute encoder from Shanghai Hengxiang Optoelectronics provides a unique digital code for each position of the shaft, regardless of power interruptions. It can immediately tell the exact position at any moment, offering seamless operation even in complex, multi - turn scenarios.

In terms of accuracy and application, incremental encoders are great for measuring speed and relative movement, commonly used in basic motion - control systems where high - precision absolute position isn't always necessary. However, for applications demanding pinpoint accuracy, such as robotics, CNC machines, and aerospace equipment, our absolute encoders shine. They eliminate the need for homing routines after power - off and provide continuous, reliable position feedback, enhancing overall system performance.

Moreover, Shanghai Hengxiang Optoelectronics' absolute encoders are engineered for durability, ensuring consistent performance in harsh industrial conditions. Whether it's extreme temperatures, vibrations, or dusty environments, our products maintain their precision. This makes them a superior choice over many incremental encoders in challenging industrial settings. So, when accuracy, reliability, and co