How to choose a suitable stepper motor?

    If you are looking for a suitable stepper motor, you need to consider several key factors such as step angle, maximum torque, rotor inertia, matching driver and power supply voltage.

    I. Step Angle

    The step angle refers to the number of pulses required for a stepper motor to complete one step, usually between 0.9 degrees (200 steps/rev) and 1.8 degrees (100 steps/rev), where 1.8-degree step angles are more common. The smaller the step angle, the higher the precision and efficiency of the motor, but also the higher the price. Therefore, when choosing a stepper motor, it is necessary to determine the appropriate step angle according to the specific application scenario.

    II. Maximum Torque

    The maximum torque refers to the maximum output torque that the stepper motor can provide, usually expressed in N.m. The maximum torque depends on the magnetic flux inside the motor and the properties of the ferromagnetic material. A larger maximum torque usually means a greater load-carrying capacity of the motor, but also increases the complexity and cost of the motor.

    III. Rotor Inertia

    Rotor inertia is an important parameter that measures the dynamic response capability of the stepper motor, representing the size of the inertia during motor rotation, usually expressed in kgcm2. The smaller the rotor inertia, the stronger the acceleration and deceleration ability of the motor. For some high-demand application scenarios, such as 3D printing, CNC machines, etc., stepper motors with small rotor inertia should be selected.

    IV. Matching Driver

    In order to ensure the normal use of the stepper motor, a driver that matches its characteristics must be selected; otherwise, the motor may not operate normally. When purchasing a driver, it is necessary to consider factors such as the stop mode, control method, and power supply voltage of the driver.

    V. Power Supply Voltage

    The power supply voltage refers to the rated working voltage of the stepper motor, usually between 12V and 48V. The correct power supply voltage can ensure the safe and stable operation of the stepper motor. At the same time, it is necessary to pay attention to the maximum power supply voltage and protection level of the driver used by the stepper motor to prevent burns caused by excessive voltage.

    In summary, choosing a suitable stepper motor requires considering the above factors comprehensively. For different application scenarios, it is necessary to choose according to actual needs and budgets.