Servo Electric Screwdriveris a type of industrial equipment that is used frequently. It has a large starting torque, and once the control voltage is provided to the stator, the rotor will immediately start to rotate. Therefore, the servo electric screwdriver features quick starting and high sensitivity. In regular use, people often compare it with stepper electric screwdrivers. What are the differences between them?

1. The torque-frequency characteristics of the two are different.

The output torque of the stepper electric screwdriver decreases as the speed increases, and at higher speeds, there is a sharp drop, so its maximum working speed generally needs to be controlled between 300-600 RPM. In contrast, the AC servo electric screwdriver operates in a constant torque output state, so it can output the rated torque within its rated speed range. It is worth noting that when the working speed is greater than or equal to the rated value, it will output constant power.

2. The overload capacity of the two is different.

The stepper electric screwdriver generally does not have overload capacity, while the AC servo electric screwdriver has a relatively strong overload capacity. However, because the stepper electric screwdriver lacks this overload capacity, when selecting a model, it is generally necessary to choose a motor with a larger torque value to overcome the disadvantages of inertia torque. After normal startup, only a small portion of energy is needed, which can easily lead to torque waste. Therefore, if considering torque savings, it is recommended to choose a servo electric screwdriver.

3. The operating performance of the two is different.

The control used by the stepper electric screwdriver is open-loop control. If the starting frequency is too high or the load is too large, it can lead to phenomena such as losing steps or stalling. Additionally, if the speed is too high during the stopping process, it is prone to overshooting. In contrast, the AC servo electric screwdriver's drive system uses closed-loop control, where the driver samples the feedback signals from the motor encoder during operation for real-time adjustments, generally avoiding losing steps or overshooting, making its control and operating performance more reliable.

The above summarizes the differences between the servo electric screwdriver and the stepper electric screwdriver. I hope it can help everyone better understand the products and choose the ones that suit their production and usage needs. Additionally, it is recommended that everyone strictly follow the equipment operating procedures during use to prevent safety risks.