absoluutenkoodrid

Absoluutenkoodrid, also known as absolute encoders, are rotary transducers that provide a unique digital output code for each distinct angular position of a shaft. Unlike incremental encoders, which require a reference point and count pulses to determine position, absolute encoders maintain their position information even when power is removed. This means that upon power-up, the encoder immediately reports the current shaft position without needing a homing sequence.

The encoder typically consists of a disc with a unique pattern for each angle and a reading mechanism. The pattern on the disc is designed to produce a binary or gray code output that directly corresponds to the shaft's angular position. As the shaft rotates, the reading mechanism senses the pattern and translates it into a digital signal. This signal can be in various formats, such as parallel, serial (SSI, BiSS, Profibus, etc.), or even analog in some specialized cases.

The primary advantage of absolute encoders is their inherent accuracy and the fact that they do not lose position information during power interruptions. This makes them ideal for applications where knowing the exact position at all times is critical, such as in robotics, CNC machinery, industrial automation, and aerospace. They eliminate the need for complex homing routines, reducing setup time and potential errors. However, absolute encoders are generally more complex and expensive than incremental encoders.