Aerotech Introduces New Ultra-Low Profile Direct-Drive Rotary Tables

  • March 24, 2004
  • Aerotech Inc
  • News
· High torque output, direct-drive brushless servomotor· Cog-free slotless motor design for outstanding velocity stability· Direct coupled, high-accuracy rotary encoder· Ultra-low profile minimizes working heightAerotech’s ADRS series direct-drive rotary stages were designed to minimize stage height. The ultra-low profile of the stage reduces the effective working height of the system, minimizing “stack-up” related errors. In addition to the low height, the ADRS series provides a clear aperture that can be used for product feed-through or laser-beam delivery. Brushless Direct-DriveTo maximize positioning performance the ADRS series utilizes direct-drive brushless motor technology. Direct-drive technology is optimized for 24/7 production environments, as there are no brushes to replace and no gear trains or belts to maintain. Direct drive also provides quicker acceleration and higher top speeds than gear- or belt-driven mechanisms, yielding higher total throughput. The low maintenance and high-throughput of the ADRS series provide a stage that yields the lowest total cost of ownership. Slotless Motor The ADRS series uses a slotless stator design that eliminates torque ripple. This motor technology provides smooth velocity stability comparable to a high-quality DC brush motor without all the DC motor’s inherent maintenance requirements. Since the slotless motor is directly coupled to the tabletop, velocity disturbances created by toothed belt drives or worm gears are eliminated. Multiple ConfigurationsThe ADRS series is available in 100 mm, 150 mm, and 200 mm versions. Each stage has options for different motor windings to better match the stage to different operating conditions. The -B winding option provides the highest possible speed operation for a given bus voltage, while the -A winding gives greater output torque for comparable current levels. Metric and “English” pattern table-tops are available and slotted mounting holes enable attachment to 25 mm and 1" hole pattern breadboards. The tabletop of the ADRS series has a labyrinth seal that protects the bearings and encoder from contamination. An optional shaft end seal is available for applications where the bottom of the stage is exposed to contamination.To learn more about the ADRS, please contact Steve McLane at Aerotech, Inc., 101 Zeta Drive, Pittsburgh, PA 15238, 412-963-7470, 412-963-7459,,

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