Absolute Encoder: Unveiling Precision and Accuracy in Position Sensing

14 Sep, 2023
Posts by : Raiseway

Absolute encoders are position sensing devices that provide feedback on the exact position of objects without the need for initialization or reference points.
1. How absolute encoders work
Absolute encoders employ a unique coding mechanism that assigns and generates a unique code for each position (every angle) within a full revolution, enabling it to determine the absolute position of the object without requiring any previous position information. As precise position feedback in applications, such as robotics, machine tools, and motion control systems.
2. Types of absolute encoders

a. Single-turn absolute encoders: Single-turn absolute encoders provide position information within one full revolution (360 degrees). They are commonly used in applications where a single revolution is sufficient to determine the object's position accurately.

b. Multi-turn absolute encoders: Multi-turn absolute encoders offer position feedback beyond one full revolution. They have additional internal gearing or counting mechanisms that allow them to measure multiple revolutions, providing highly accurate absolute position information over extended rotations.
c. Optical absolute encoders: Optical absolute encoders use optical discs with patterns of lines or tracks to generate position information. They employ light-emitting diodes (LEDs) and photosensors to detect the patterns, providing high-resolution and reliable position feedback.
Absolute encoders are prevalent in automatic control of various industries due to their precision and accuracy.