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PID

FAQ: How to tune servo systems for high dynamic response?

June 21, 2016 By Danielle Collins Leave a Comment

feed-forward

The purpose of a servo control loop is to minimize error, and this is often done through the use of PID (proportional-integral-derivative) gains, which correct errors between the target value and the actual value. But the PID algorithm is reactive, and takes time to respond. Case in point: the proportional term requires an error in order […]

Filed Under: Controls, FAQs + basics, Servo Drives, Servo Motors Tagged With: dynamic response, feed-forward, PID, servo tuning

FAQ: What are servo feedback gains, overshoot limits, and position error limits?

March 22, 2016 By Danielle Collins 1 Comment

Feedback Gains

Servo tuning can be accomplished by several methods, but the most common way is to use a PID algorithm. The PID algorithm uses three feedback gains—proportional gain, integral gain, and derivative gain—to compare the commanded position (or velocity) with the actual value and issue commands to correct errors between the two. Feedback gains determine how […]

Filed Under: Controls, FAQs + basics, Motors, Servo Drives, Servo Motors Tagged With: feedback, feedback limit, overshoot limit, PID, servo gain, servo tuning

FAQ: How are the controls for servo motors tuned?

February 24, 2016 By Danielle Collins 2 Comments

Servo Tuning

Servo motors are used in closed loop systems and operate based on error feedback—the comparison of a target value to the value actually reached by the motor/load. Because mechanical systems have inertia and compliance, the target value is rarely achieved on the first position command—hence, the need for feedback and correction commands. Servo tuning is […]

Filed Under: Controls, Drives + Supplies, FAQs + basics, Motors, Servo Drives, Servo Motors Tagged With: PID, servo controller, servo drive, servo motor, servomotor, tuning

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