Linear servomotors from NPM have high precision and are free of
cogging
The NPM linear servomotors are suitable for applications requiring a high-precision direct-driven motor. They
are ideal not only for complex motion in confined spaces, but also for parallel drive systems with, for
example, two or more parallel linear motors controlled by a single drive controller.
There is no iron in either the shaft or the coil (forcer), which ensures high precision and no cogging. The
coils themselves form the core and thus give the motor the necessary stiffness. These linear servomotors are
contactless. Since the coil wraps completely around the magnets, the magnetic flux is used effectively. This
allows a large annular nominal air gap of 0.5 to 5 mm. This air gap is non-critical, meaning there is no
variation in force. The linear shaft motor does not require lubrication and does not show any power drop due
to wear and aging.
DThe play between shaft and driver eliminates the need for settings such as guide
positioning or concentric settings. Dust and noise, as with ball screws and pneumatic systems, do not occur
in the linear servo motor. This is not only beneficial for cleanroom applications, but also helps to improve
the working environment. The linear shaft motor enables a level of precision not achieved by ball-screws and
allows you to drastically improve the yield of high precision processes, which are limited by other linear
mechanism. The precision of repetitive positioning is dependent on the resolution of the linear encoder.
Complex movements
within limited spaces
The SS series of linear servomotors are an economical solution for applications that perform multiple
complex movements under confined spaces with high reproducibility.
The linear motor has the smallest available runner (Forcer) with a diameter of 25 mm and a length of 30
mm. It has a higher thrust compared with other standard motors in the market. The maximum usable travel
distance on a shaft is larger than two meters. The compact Forcer enables a high-density implementation.
Upon customer request, the servo motors can be manufactured in the desired length.
Linear servo motor
