Rotary Tables feature ironless, slotless, direct-drive design.
Press Release Summary:
Series ADRT Rotary Stage is equipped with brushless servomotor and direct coupled, rotary encoder. Low inertia and zero backlash make unit suitable for applications requiring frequent directional changes. When coupled with MXH series resolution multipliers, resolution can be as fine as 0.12 arc sec. Integral T-slots ease integration of custom fixtures and instrumentation. Integral mounting flange permits top-down mounting and side-exit cables.
Original Press Release:
New Rotary Tables Feature Slotless, Ironless, Direct-Drive Design
o High torque output, direct-drive brushless servomotor
o Cog-free design for outstanding velocity stability
o Outstanding wobble and runout
o Direct coupled, high-accuracy rotary encoder
o Large diameter clear aperture
Aerotech's new ADRT Series Direct-Drive Rotary Stage provides superior angular positioning and velocity control. Applications range from indexing to high-speed laser machining to precision wafer inspection.
Brushless Direct-Drive
The ADRT Series uses a slotless, ironless design to give ultra-smooth performance and ease of tuning when compared to competitive iron core and variable-reluctance motor designs. This motor has all the advantages of a brushless direct-drive motor - no brushes to wear, no gear trains to maintain, and high acceleration and high speeds. The ADRT is capable of speeds and accelerations that are significantly higher than other competing products. Low inertia and zero backlash make the ADRT the ideal solution for applications requiring frequent directional changes. When coupled with Aerotech's MXH series resolution multipliers, resolution can be as fine as 0.12 arc sec. The motor and high-performance rotary encoder are directly coupled to a common shaft. The absence of gear trains and mechanical couplings means no position errors caused by hysteresis, windup, or backlash.
Superior Mechanical Design and Flexible Configurations
Dual large diameter bearings maximize performance with respect to wobble, moment stiffness, and repeatability, while integral "T-slots" ease integration of custom fixtures and instrumentation. The square package design coupled with the integral T slots permit horizontal mounting without custom brackets. Competitive products require additional mounting plates for top down mounting or special base considerations due to bottom exiting of motor power and feedback cables. The ADRT has an integral mounting flange for easy top-down mounting and side-exit cables. In addition, Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete integrated positioning package.
Slip rings and rotary unions are available to ease integration of custom tooling, and a holding brake is available to limit movement of the stage during large impulse loads or when power is removed from the motor.
To learn more about the ADRT, please contact Ron Rekowski at Aerotech, Inc., 101 Zeta Drive, Pittsburgh, PA 15238, 412-963-7470, 412-963-7459, sales@aerotech.com, www.aerotech.com < aerotech.com>.
