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Stepper Motor a “digital” version of the electric motor. The rotor moves in discrete steps as commanded, rather than rotating continuously like a conventional motor. When stopped but energized, a stepper motor holds its load steady with a holding torque. Wide spread acceptance of the stepper motor within the last two decades was driven by the ascendancy of digital electronics. Modern solid state driver electronics was a key to its success. And, microprocessors readily interface to stepper motor driver circuits.

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Step Angle Stepper motors have a step angle. A full 360° circle divided by the step angle gives the number of steps per revolution. For example, 1.8° per full step is a common step size rating, equivalent to 200 steps per revolution.

Holding Torque? Stepper motor holding torque is one of the main specs of any stepper motor. It is a simple indication of the "strength" of the motor. Stepper motor torque is usually measured in oz/in or ounces per inch.



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