The V-551 linear motor stage uses ironless motors, but instead of moving the coils, the magnetic track is attached to the platform. The reason for this design is that typically, with linear motor stages, the parts with the highest wear are moving cables, limiting the lifetime of such a device.
As with the motor, also the for the absolute position encoder, the scale is moving instead of the sensor head, eliminating all moving cables from the design. Now lifetime is only limited by the linear crossed-roller bearings. The V-115 integrated linear motor integrated is “oversized” running in a low temperature window even under dynamic applications.