Steps per Revolution and Step Angle in Stepper Motors


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Stepper Motors are well suited for low torque applications which require precise position control. This being true, what considerations are there for selecting the number of Steps per Revolution and Step Angle when choosing Stepper Motors for your application?
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First, there is the relationship between the number of Steps per Revolution and Step Angle in stepper motors. These values can select from our Stepper Motors parametric filters.

Steps per Revolution = 360⁰ / Step Angle
For example, for Trinamic Motion Control GmbH, QSH4218-35-10-027, its step angle is 1.8⁰. So the number of steps per revolution = 360 / 1.8 = 200. This is a fixed relationship - all 1.8⁰ step angle stepper motors will have 200 individual steps. When selecting a stepper, choose a Steps Per Revolution figure or a Step Angle figure - not both.

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More steps per revolution shows that this stepper motor is able to move in smaller increments and thus control its position more precisely.

Please note that more steps per revolution for stepper motors will cause those motors to rotate at a lower speed and provide lower torque than a similarly sized motor with fewer steps per revolution. Therefore, when looking for a high-precision stepper motor, the required speed and torque output for your application are essential to consider.


Stepper Motors Characteristics