Kollmorgen Introduces New Goldline DDR Brushless Servomotor
Kollmorgen Corp. (Radford, VA) announced the release of its new high-resolution sine encoder option for the Kollmorgen Goldline DDR (Direct Drive Rotary) brushless servomotor. Typical applications are rotary tables, indexing assembly machines and film coating. A direct drive motor is a new alternative for industrial motion-control applications that require high torque, flat profile and maintenance-free operation.
Kollmorgen's new motor has continuous torque ratings up to 136N-m (100lbs per foot). Frame sizes are available from 6.9" to 11.2". A key advantage is that it eliminates mechanical parts, such as belts/pulleys and gearboxes, and the backlash and compliance associated with these transmissions. The direct drive motor mounts directly on a machine for a flat, compact and quiet design. In addition, the motor provides a large diameter hollow shaft for fluid and pneumatic or electrical feed-through.
The sine encoder provides position information to the drive in the form of analog sine/cosine signals. The drive then decodes the sine into a fine resolution to improve velocity control, repeatability, increase system stiffness and reduce position dither. The new sine encoder system provides a resolution of 2,097,152 counts/rev or 0.62arc-sec. Also, the sine encoder increases the feedback accuracy to 20arc-sec, compared to 600arc-sec for resolvers, to position a load.
The Kollmorgen Goldline DDR Series is matched with the ServoStar digital amplifier family.
