Advantages of Linear Stepper Motors (Comparison with Traditional Stepper Motors)

(1) High-Speed ​​Response

Generally speaking, the dynamic response time of mechanical transmission components is several orders of magnitude longer than that of electrical components. Because some mechanical transmission components with large response time constants, such as lead screws, are eliminated in the system, the dynamic response performance of the entire closed-loop control system is greatly improved, resulting in exceptionally sensitive and rapid response.

(2) High Precision

Because mechanical transmission mechanisms such as lead screws are eliminated, the tracking error caused by the lag in the transmission system during interpolation is reduced. Through linear position detection feedback control, the positioning accuracy of the machine tool can be greatly improved.

(3) High Transmission Stiffness and Smooth Thrust

"Direct drive" improves its transmission stiffness. At the same time, the layout of the linear motor can be arranged according to the shape and structure of the machine tool guide rails and the force conditions during the movement of the worktable. It is usually designed to be evenly distributed and symmetrical, ensuring smooth thrust.

(4) High speed and short acceleration/deceleration process

Linear stepper motors were initially used primarily in maglev trains (speeds up to 500 km/h). Now, they are used in machine tool feed drives, easily meeting the maximum feed speed requirements for ultra-high-speed cutting (60-100 m/min or higher). Due to their "zero-transmission" high-speed response, the acceleration/deceleration process is greatly shortened, allowing for instantaneous high-speed start-up and precise stopping during high-speed operation. Acceleration can generally reach 2-10g (g=9.8 m/s²).

(5) Unlimited stroke length

By connecting the stationary components of the linear stepper motor in series on the guide rail, the stroke length of the moving component can be extended indefinitely.

(6) Low operating noise

Because the mechanical friction of components such as the transmission screw is eliminated, and the guide rail pair can use rolling guide rails or magnetic levitation guide rails (no mechanical contact), the motion noise is greatly reduced.

(7) High efficiency

Since there is no intermediate transmission link, the energy loss during mechanical friction is eliminated.