Are servo and stepper functionalities merging?

How many differences still remain between these motors?

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With the advancement of motor control and construction, the operational difference between servo motors and stepper motors has become minimal. Theoretically, a servo motor can move to an infinitely small fraction of a rotational degree, whereas a stepper motor is limited by the number of individual stator windings that create each step. Practically, these limitations do not exist.In general, a servo motor is just a part of a servo system. The system consists of a motor, a drive and a feedback device.The drive, or amplifier, takes the incoming ac power and rectifies it to supply a dc voltage to the drive circuitry. The drive can be a simple rectifier with power relays…

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Voices: Real Answers

Select parts and configure systems online

These are the online tools, stores and portals where the design and purchasing departments can go to select parts and configure systems

By Mike Bacidore, editor in chief

A Control Design reader writes: I work at an OEM that makes process skids for wastewater treatment and custom agricultural-related machines and equipment. It seems like we have a huge number of suppliers, which affects both design and procurement with too much time spent specifying parts, too many…

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Most Recent

  • Are servo and stepper functionalities merging?

    By Tom Stevic, contributing editor

    With the advancement of motor control and construction, the operational difference between servo motors and stepper motors has become minimal. Theoretically, a servo motor can move to an infinitely small fraction of a rotational degree, whereas a stepper motor is limited by the number of individual…

    Full Story
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    By Dave Perkon, technical editor

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    By Eric Rice, Applied Motion Products

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    By Mike Bacidore, editor in chief

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