Both motor feedback and load feedback are used to achieve best performance
- Applications requiring total control of load movement
- Scenarios using both low resolution absolute commutation and high resolution position feedbacks
System performance is often adversely affected by undesired external inputs, such as sensor noise and loading base vibrations.
In such situations, a dual loop control structure is often used to improve control over the handled load. A dual loop system generally provides better performance than conventional single loop control srtructures.
Elmo’s dual loop implementation draws input from various sources, including: position, velocity or commutation feedbacks.
The Elmo Application Studio (EAS) is used to define a ratio between the position and velocity resolutions, and the controller units are set automatically.
Dual loop control is especially beneficial in applications with both low resolution absolute commutation feedback and high resolution position feedback, since it can use the multiple feedbacks to greatly improve load motion performance.
The following EAS screenshot shows how the functionality of multiple feedbacks is set. Socket 1 is used for velocity loop control and commutation while Socket 2 is used for position control (load).