What term denotes the number of degrees the motor moves per step?

• A. Step angle
• B. Rotation angle
• C. Lead angle
• D. Pitch angle

Answer: (A)

In stepper motors, the term that describes how many degrees the rotor moves for each full step is the step angle. This angle sets the motor’s positional resolution: a smaller step angle means you can move in finer increments. For example, a common hybrid stepper has a step angle of 1.8 degrees, giving 360/1.8 = 200 steps per full revolution. Microstepping can subdivide each step into smaller parts, effectively reducing the angle per microstep (e.g., 1.8 degrees divided by 8 or 16), but the basic term for the per-step movement remains step angle. The other terms—rotation angle, lead angle, and pitch angle—pertain to overall rotation or to screw-thread geometry, not to the per-step movement of a motor.