Under normal circumstances, we said that the amount of servo motor and stepper motor are more than a little, then the linear motor is heard less, although we do not have any use, but it is still necessary to have a certain degree of learning.
Wide feed speed range. Can be from 1 (1) m / s to 20m / min above, the current processing center's fast forward speed has reached 208m / min, while the traditional machine tool fast forward speed <60m / min, usually 20 ~ 30m / min.
Good speed characteristics. Speed ​​deviation can reach (1) less than 0.01%. Acceleration. The maximum acceleration of the linear motor can reach 30g. At present, the feed speed of the machining center has reached 3.24g, and the feed machine laser has reached the feed acceleration of 5g, while the traditional machine feed acceleration is below 1g, which is generally 0.3g.
High positioning accuracy. Using closed-loop grating control, positioning accuracy of 0.1 ~ 0.01 (1) m. The feedforward-controlled linear motor drive system can reduce the tracking error by more than 200 times. Due to the dynamic characteristics of the moving parts, the responsiveness, and finer interpolation control, nano-level control can be achieved.
There is no limit to the trip. The traditional screw drive is limited by the manufacturing process of the screw, generally 4 to 6m. Longer strokes need to be connected to the long screw, which is not ideal in terms of manufacturing process or performance. The use of linear motor drive, the stator can be infinitely lengthened, and the manufacturing process is simple, there have been large-scale high-speed machining center X axis up to 40m. The structure is simple, the motion is stable, the noise is small, the moving parts have little friction, wear is small, the service life is long, and the safety is reliable.
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