The ARMS series direct-drive rotary motion simulators from Aerotech (Pittsburgh) can provide resolutions as fine as 0.02 arcsecond, with accuracy to +/-2.5 arcsecond and repeatability to +/-0.5 arcsecond. The motor and high-performance rotary encoder and directly coupled to a common shaft. The ARMS provides rate resolution down to 0.0002 deg/s and rate stability to 0.0001%.

The simulators incorporate dual large diameter bearings to maximize performance with respect to wobble, moment stiffness, and repeatability. The bearings can handle payloads to 230 kg.

The ARMS series utilizes Aerotech’s S-series brushless, slotless motor to eliminate cogging and torque ripple. With its low inherent inertia and optimized motor design, the simulators reportedly handle speeds and accelerations higher than competitive products.

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Motion Control Technology Magazine

This article first appeared in the December, 2007 issue of Motion Control Technology Magazine.

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