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servo motor

FAQ: What are the different ways that industry classifies servo motors?

April 16, 2016 By Danielle Collins 1 Comment

motor terminology

A servo system is one in which the system’s error (in position, speed, or torque) is corrected through the use of a feedback device that compares the system’s actual performance with its commanded performance. What makes a motor a servo motor, then, has less to do with its construction and operation, and more to do […]

Filed Under: AC Motors, Brushless Motors, DC Motors, FAQs + basics, Motors, Servo Motors Tagged With: asynchronous motor, brushed motor, brushless motor, DC motor, servo motor, servomotor, synchronous motor

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

FAQ: What is settling time in a motor-driven servo system?

February 15, 2016 By Danielle Collins Leave a Comment

settling time

One of the unique characteristics of servo systems is that they operate in closed-loop mode. This means they use feedback—from a resolver or encoder on the motor, and sometimes from an encoder on the load—to compare the commanded value (typically position, speed, or torque) with the value that was actually reached. Based on this feedback, […]

Filed Under: Drives + Supplies, FAQs + basics, Motors, Servo Drives, Servo Motors Tagged With: servo, servo control, servo motor, settling time

How are servo motors physically different from motors that run open loop?

February 5, 2016 By Danielle Collins Leave a Comment

servo motors

A servo motor is, by definition, one that runs closed-loop, with feedback to control the motor’s position, speed, or torque. Of motors that run open-loop, with no feedback device, stepper motors are the most common type. Despite their different control mechanisms, stepper and servo motors have a few characteristics in common. First, they both have […]

Filed Under: FAQs + basics, Motors, Servo Motors, Stepper Motors Tagged With: servo motor, servomotor, stepper motor

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