(1) The stepping motor adjusts the frequency of the stator phase current, such as the input pulse from the driver circuit, which allows it to operate at a low speed. When the motor is waiting for a stepping command, the rotor remains stationary. However, during low-speed operation, the speed fluctuation can be quite significant. Switching to high-speed operation may reduce these fluctuations, but it often results in insufficient torque. This means that at low speeds, the torque tends to vary, while at high speeds, the torque becomes inadequate.
(2) A PM-type stepping motor with a small step (50 mm or less) typically has a step angle of 7.5 degrees. Such a motor might experience issues with position control accuracy, especially under varying load conditions.
(3) The output shaft of the stepping motor is directly connected to the load. When the load has a large moment of inertia, the motor may struggle with sufficient acceleration torque, leading to poor performance and potential stalling.
(4) In situations where low-speed operation requires high torque and braking capability, the motor may not perform optimally. This can result in missed steps, reduced precision, or even mechanical failure.
To address these challenges, it's important to consider using a gear reducer. The reducer used with a stepping motor should have minimal backlash, strong resistance to impact, and high surface hardness on its gears. These features ensure smooth and precise motion control, especially when dealing with high-inertia loads or demanding applications.
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