What are absolute multi-turn encoder and their usages?

 Absolute encoders are responsible for providing unique position values or data words at every point of their rotation. All those points are implied as to the absolute position of the encoder. The absolute multi-turn encoder starts encoding the exact position of the rotating shaft as they get measured from the moment the encoder is activated. The encoder functions using an optical, magnetic, or capacitive sensor. All these principles help in reading the unique code of the rotating disc along with the shaft.

The absolute encoder can maintain the position of the shaft, so you can know the position instantaneously if the encoder is powered. The knowledge of absolute position is essential for many systems, while in some specific positions, it is ideal to continue rotating the shaft in one direction not to cause any damage to the equipment. Most importantly, the absolute multi-turn encoder can provide a real-time position. 

The applications of absolute encoder

·         Application measuring

Unlike single turn encoder, the multi-turn encoders are capable of application measuring. The absolute multi-turn encoder is ideal for measuring both the degree of rotation and the total number of rotations of the application. These encoders can measure longer lengths of the linear motions if you are not using a linear encoder or can't access the rotation point, e.g., tracking the motion of satellite dish, rotation measurement of the slip-ring, or measuring the travel of a logging system.

·         For servo motor feedback

The multi-turn encoders are ideal for use in servo motor feedback where the application engages with coordinated axes that are offset. By using a single-turn encoder, the offsets will surely be lost if the system loses power. Even though having a battery backup can help with this situation, the system would not recover its position if it moves mechanically while the electric power is off. Hence, the operator should not move the device manually. Using an absolute multi-turn encoder in such cases can solve these issues as the encoder can program the offset position into the machine's logic.

It is essential to pick the adequate type of encoder for your product design to solve all of your position feedback requirements. You can contact Netzer Precision Position Sensors to get a solution for any absolute encoder needs. Visit their website https://netzerprecision.com/ for requesting their service.