A linear stepper motor is an electric motor that converts an electrical pulse signal into linear motion. It converts rotational motion into linear motion through the interaction of pulsed electromagnetic fields generated by the magnetic rotor core and stator. Linear stepper motors can directly perform linear motion or linear reciprocating motion without the need for external mechanical linkage devices, thereby simplifying the design and improving motion accuracy.

To choose the appropriate model, please pay attention to the following points:

1. Load requirements

Determine the appropriate motor size based on the required load, such as Nema 8, 11, 14, 17, 23.

Loads are divided into static loads and dynamic loads. Static load refers to the maximum thrust that the screw bears when it is stationary, and dynamic load refers to the maximum thrust that the screw bears when it is moving. When selecting, both factors should be considered simultaneously.

2. Running speed

Select the appropriate lead screw based on the required linear running speed of the motor, such as Tr8 * 2, lead screw outer diameter=8mm, and lead=2mm.

The running speed of a linear motor is closely related to the lead of the screw, which refers to the displacement distance of the nut on the screw axis when the screw rotates one circle. The larger the lead, the greater the displacement of the nut per turn of the screw, and the faster the movement speed. Generally speaking, when the speed is high, choose a large lead; When the speed is low, choose a smaller lead.

3. Movement distance

Determine the appropriate length of the lead screw based on the required linear running distance.

The length of a screw includes two concepts: full length and thread length. The full length refers to the overall length of the screw, and the thread length refers to the total length of the threaded part.

4. Nut type

There are many types of nuts, and when selecting, the installation size and the performance requirements should be considered comprehensively. For example, the flange form, length, material, and type (standard/anti-backlash nut) of the nut.

5. Usage environment and special requirements

Consider the requirements of special applications, such as waterproof, oil-resistant, etc. If necessary, please communicate further with our sales engineer.

In our product series, we also offer non-captive linear motors in addition to providing external nut linear motors.

The working principle of the non-captive linear motor is to integrate the nut with the motor rotor into one, and the screw shaft passes through the center of the motor rotor. When in use, fix the screw and prevent it from rotating, when the motor is powered on and the rotor rotates, the motor will move in a straight line along the screw; Conversely, if the motor is fixed and the screw is prevented from rotating, the lead screw will move in a straight line.