Strategies for improving the torque and resolution of stepper motor

    Torque and resolution are two key parameters for measuring the performance of stepper motors. The torque determines the rotational force that the motor can provide, while resolution refers to the minimum positional variation that the motor can distinguish. In certain application scenarios, both high torque and high resolution are required, which requires a series of strategies to optimize the performance of stepper motors. This article will explore how to improve the torque and resolution of stepper motors through different technical means and methods.
 

    Strategies for improving the torque of stepper motors
 

    1. Choose the appropriate motor
    Different models of stepper motors have different torque characteristics. Choosing a motor with a higher rated torque and a better torque speed curve can ensure sufficient torque is provided at low speeds.
 

    2. Increase current
    The torque of a stepper motor is directly proportional to the current passing through its coil. By increasing the current supplied by the driver to the motor, its torque output can be improved without damaging the motor.
 

    3. Use high step subdivision drivers
    Although subdivision technology is mainly used to improve resolution, appropriate subdivision settings can also improve the torque output of the motor, especially during low-speed operation.
 

    4. Optimize the heat dissipation of the motor
    Continuous high torque output may cause the motor to overheat. Improving the heat dissipation system of the motor can prevent torque reduction caused by high temperatures.
 

    Strategies for improving the resolution of stepper motors
 

    1. Application segmentation technology
Subdivision technology is an effective method to improve the resolution of stepper motors. By inserting microsteps between each full step, more precise position control can be achieved.
 

    2. Use a high-resolution encoder
 For applications that require extremely high precision, incremental or absolute encoders can be combined to provide closed-loop control, thereby achieving higher resolution and accuracy.
 

    3. Software algorithm optimization
    By using advanced software algorithms, such as interpolation algorithms, the system's instruction resolution can be improved, resulting in smoother and more accurate motion.
 

    4. Reduce system elasticity and gaps

    The elasticity and clearance in mechanical systems can reduce the effective resolution of stepper motors. By optimizing mechanical design to reduce these non ideal characteristics, the overall system resolution can be improved.
 

    In practical applications, it is often necessary to combine multiple strategies to simultaneously improve torque and resolution. For example, selecting high-performance motors, configuring drivers reasonably, and implementing subdivision techniques are all effective ways to improve the performance of stepper motors. Meanwhile, the design of a closed-loop control system can further enhance the stability and responsiveness of stepper motors under high-speed and high load conditions.