Rotary Direct Drive-Theta Rotax
COMPACT HOLLOW SHAFT MOTOR
The new, self-developed miniature hollow shaft servo motor ROTAX® Rxhq (high torque) impresses with its extremely compact design of 50 x 50 x 55mm / 1.96 x 1.96 x 2.16″. Direct drive motor, precise bearings and the single turn absolute encoder are completely integrated.
The direct drive servo motor is based on the magnetic flux technology of wind turbine generators. This generates a high torque at low speed. In figures this means a factor 2-3 higher torque with the same construction volume compared to a conventional direct drive of competitors.
The large hollow shaft with a diameter of 12mm / 0.47″ offers generous space for cables, vacuum or compressed air lines, light and laser beams, glass fibres and other media. Another advantage in this context is the short overall length of only 55mm incl. built-in encoder. The connection cable consists of only one cable and offers advantages in the space required for cable installation. Thanks to the precise, precompressed double bearing on the front flange, the drive achieves high rigidity with high axial torque capacity.
The direct drive developed in-house impresses with its flat design, compact external dimensions and a hollow shaft with a diameter of 50mm. Cables, vacuum or compressed air lines, light and laser beams, glass fibers or camera lenses can thus be easily guided through the hollow shaft.
The absolute measuring system allows an immediate start without previous referencing. With a resolution of 120’000 inc. per revolution, repeatability of ± 11arcsec can be achieved. The single-cable connection can be supplied in right-hand or left-hand output configuration.
Together with the patented “Force Calibration” function, undesired cogging, weight and friction forces of the ROTAX® Rxhq direct drives can be easily compensated. This makes it possible to specify, limit and monitor forces in processes. Together with the Forceteq® basic technology included in the XENAX® servo controller, complete force/distance diagrams can be recorded – an additional torque sensor is not necessary.