Articles on: Learning & FAQ

Segmentation Choices and Usage Limitations of T-series Closed-loop Drivers

1. Selection of Subdivision for Drivers

In the absence of subdivision, a stepper motor generally rotates one step angle for every pulse signal it receives. Therefore, without subdivision, a motor with a step angle of 1.8° completes one revolution every 200 pulses, while a motor with a step angle of 0.9° completes one revolution every 400 pulses. To control the motor more accurately, drivers usually have subdivision functionality. Subdivision reduces the actual step angle of the motor, thereby improving precision.

Our stepper drivers have a Pulse/rev Table, which represents the number of pulse signals the motor needs to receive to complete one revolution. For example, if a motor with a 1.8° step angle is set to 2000 Pulse/rev, it will complete one revolution for every 2000 pulses, resulting in an actual step angle of 1.8°/(2000/200) = 0.18°.

However, larger subdivisions are not always better. Subdivision technology in stepper motors is essentially an electronic damping technique, primarily aimed at reducing or eliminating low-frequency vibrations in the motor. Improved motor precision is just an additional feature of subdivision technology. In practical motor applications, if high speed is required and precision and smoothness are not critical, there is no need for high subdivision. Conversely, in situations where the motor operates at very low speeds, larger subdivisions should be selected to ensure smoothness, reduce vibrations, and minimize noise.

In the absence of specific customer requirements, we generally recommend setting the driver subdivision within the range of 1600-6400.

2. Limitations of T-Series Closed-Loop Drivers

Our T-Series closed-loop drivers (CL42T, CL57T, CL86T) are only suitable for motors with a 1.8° step angle. Additionally, the motor encoder must be a differential 1000-line encoder.

Updated on: 29/02/2024

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