Aerotech announces ABRT Air-Bearing Stage
Superior Mechanical Design
The ABRT design features large air-bearing surfaces and innovative preloading for high stiffness and load capacity, producing not only excellent axial and radial error motions (asynchronous is <20 nm for each), but outstanding tilt error motion (asynchronous is <0.04 arc sec), as well. The resultant performance is significantly better than other rotary air-bearing tables and spindles, greatly benefiting applications requiring exceptional planar performance. Furthermore, this stage family provides a clear aperture up to 50 mm in diameter that can be used for product feed-through, laser beam delivery, cable clearance, or application-specific requirements.
The ABRT series utilizes optimized versions of Aerotechs S-series slotless, brushless motor to maximize positioning performance. The S-series motor uses an advanced magnetic circuit design to produce high torque output with minimal heat generation. The slotless design is inherently zero-cogging and torque-ripple-free. This makes ABRT stages ideal for applications requiring smooth scan velocities at low or high speeds. Maximum speed is up to 1200 rpm.
Custom versions of the ABRT are available to satisfy rate table and high precision inertial guidance test-stand applications. Other features, such as slip rings and rotary unions, are available.
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