Compact servo motors: shorter - lighter - more dynamic

19 January 2011

The 8LV servo motor series from B&R Industrial Automation has been expanded to include additional high-performance products. All the mechanical and electrical elements in this series have been integrated into an extremely compact unit. Equipped with the smallest possible absolute encoder system with a resolution of 262,144 steps per revolution, the system is able to achieve the highest precision while taking up the least amount of space.

In order to save weight, installation space and the amount of mass being moved, gearboxes are mounted directly on the motor. This new mounting system was made possible by totally reconstructing the motor's output flange and adapting it completely to the gearboxes. The centre gear rests directly on the motor shaft and replaces the input shaft on the gearbox.

This type of mounting renders an adapter flange, the clamp system and the gearbox input bearing obsolete. In addition to an approximately 20% savings in weight and installation space, the amount of mass that has to be moved is considerably reduced as well.
Because of the rigid structure and the small amount of mass, high-performance control loops can be created for dynamic applications, even in tight spaces.

With gearboxes that are mounted directly on the motor, it's possible to select between the 8GM30 economy series, the 8GM40 standard gearboxes and the 8GM50 reinforced gearboxes.

Gearboxes in the standard series are available as single-stage and two-stage units with a backlash less than 8, and less than 15 arcminutes respectively. The 8GM50 series uses bearings optimised for radial and axial forces for mechanical compatibility with Wittenstein products.