Impressive "Stopping Accuracy." Moves Quickly in the "Low / Mid-Speed Range"
hybrid stepper motor have remarkable stopping accuracy, and accurate control with open-loop is possible. For example, when using the RK II Series for positioning of a rotating table, its stopping accuracy is within ±0.05° (with no load). Because stopping position errors do not accumulate between steps, high accuracy positioning is possible. The structure of the stepper motor, which requires no encoder, allows for the simple drive system and low cost.

Point 1: Fantastic Stopping Accuracy
For example, when converting stopping accuracy ±0.05° of a stepper motor to the ball screw mechanism:

Operating Conditions:
Motor: RK II Series
Lead of ball screw: 10mm
Stopping Accuracy: ±1.4µ m

Generally, accuracy of a ground ball screw type is ±10µ m. When using a rolled ball screw type, its accuracy declines to ±20µ m, indicating that the stopping accuracy of a nema 23 stepper motors is much higher than that of ball screw types.
High torque within the low / mid-speed range is another great feature of stepper motors. One of the main features of servo motors is to generate flat torque from mid to high speed ranges. Servo motors are suitable for long-stroke operations (many rotations). On the other hand, torque characteristics of stepper motors are not flat. The torque curve within the low / mid-speed range tends to become very high, while becoming very low in the high speed range. Besides the stable rotations in the low speed range, which servo motors struggle with, stepper motors can offer high torque within the required speed range for short-stroke operations (less rotations), thus they are suitable for selecting the desired step angle for multiple rotation tables and inching applications. This is due to the short positioning time for the short-stroke operation, thus the motor decelerates and stops before reaching the maximum speed. In other words, high-speed characteristics are usually not required.