ACS Motion Control has developed an algorithm -- ServoBoost -- designed to provide significant throughput enhancement for motion-control products. The company noted that ServoBoost also minimizes settling time and stand-still jitter. According to ACS, the algorithm provides automatic adaptation to large load changes and automatic compensation for disturbances, resonances, axes interaction, and cogging -- all in real-time.
The ServoBoost algorithm was designed to identify disturbances in real-time while also analyzing the root cause, compensating for it, and attenuating its impact. This results in decreased move and settle time, the ability to handle significant changes in load, and the elimination of cogging and similar issues.
ACS noted that field results have shown measurable performance improvements over current motion-control products. “ServoBoost offers a significant improvement in servo performance and stability when compared with even the most advanced types of PID feedback control,” Jason Goerges, general manager at ACS Motion Control, told Design News. “ServoBoost provides a significant reduction in motion following error, which increases machine process accuracy and precision. It also minimizes the time it takes to move and settle into position, which results in better machine throughput.”
ACS developed the algorithm to deliver improvements on several fronts. The degree of improvement over existing motion control varies by deployment. “The standard ACS servo algorithm is an advanced PID with cascaded loops, filters, feed forwards, and several other features for improving performance,” Goerges told us. “ServoBoost will always yield better performance than such an algorithm. How much better is dependent on the application.”
ACS noted that the ServoBoost algorithm has been field-proven in various applications. In one example -- a three-axis machine designed to manufacture and test ultra-precision optical components -- ServoBoost helped increase performance significantly.
To develop the new algorithm, ACS used both theory and real-world experience. “The ServoBoost algorithm is the result of advanced control theory combined with several years of in-the-field experience and corresponding tweaks and adjustments,” said Goerges. “Implementing the ServoBoost algorithm on the entire SPiiPlus product family has only become possible with the latest generation of products that employ the latest generation of ACS servo processors, since the algorithm requires a large amount of processing power.”
ServoBoost algorithm is available as a plug-in feature. It can be ordered with ACS motion-control products or as an upgrade at a later date.