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Movement Methods of Linear Stepper Motors and Linear Actuator

Linear stepper motors are one of the common methods for achieving precise linear positioning. It integrates the screw and stepper motor, and customers do not need to install a coupling when using it, which not only saves installation space, but also improves system assembly efficiency.

According to different structures, linear stepper motors can be divided into three types: external linear stepper motor, non-captive linear stepper motor and captive linear stepper motor; the modular platform integrating the linear stepper motor is also called a linear actuator.

The screw rod of external linear stepper motor and the motor rotor are integrated into one body and serve as the output shaft of the motor. The nut is located outside the motor and is engaged with the screw rod and connected to the drive device. When the motor rotates, the nut moves linearly along the screw.

The non-captive linear stepper motor integrates the rotor and nut of the motor, and the screw shaft passes through the center of the motor rotor. When in use, fix the motor and prevent the screw from rotating. When the rotor starts, the screw will move in a straight line; conversely, if the screw is fixed, the motor will move in a straight line along the screw.

The nut of the captive linear stepper motor and the motor rotor are also integrated into a whole, and the screw rod passes through the center of the motor rotor. The screw rod is connected to a plunger and anti-rotation measures are taken. When starting, the nut rotates to drive the screw rod to move and drive the plunger to move linearly.

Linear actuator is a highly integrated transmission platform that makes it possible to convert rotational movements into smooth and precise linear movements.It integrates multiple components such as linear motors, drive circuits, sensors, etc. It precisely assembles the guide rail system and transmission system and integrates it into in one unit.

Updated on: 25/03/2024

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