APR series rotary stages provide high precision, low tilt motion errors and large load capacity

Written by: Aerotech Ltd | Published:

APR mechanical-bearing rotary stages offer positional accuracy to 1.5 arc-sec and axial load capacity up to 450 kg. Aimed at high-precision rotary positioning for applications such as precision component testing, optical calibration systems, laser micromachining and sub-micron metrology, the APR's brushless direct-drive technology easily outperforms traditional worm/wheel stages.

Aerotech continues to improve and innovate its direct-drive rotary stage capability with the APR mechanical-bearing rotary stage series which offers positional accuracy to 1.5 arc-sec and axial load capacity up to 450 kg. Aimed at high-precision rotary positioning for applications such as precision component testing, optical calibration systems, laser micromachining and sub-micron metrology, the APR's brushless direct-drive technology easily outperforms traditional worm/wheel stages, delivering considerably smoother and higher speeds, much improved angular precision, with zero backlash and far superior throughput.

The range covers seven models in three frame sizes with nominal square footprint mounting dimensions of 150, 200 and 260 mm, offering a clear through-aperture of 50, 75 or 100 mm, respectively, for electrical or other services such as laser or air supplies.

The APR series builds upon and improves Aerotech's previous performance characteristics for direct-drive/mechanical bearing stage construction. Through design optimisation, improved component precision and superior high-precision angular contact bearings, the resulting large moment stiffness and high load capacity yields exceptionally low error motion performance. Certified results throughout the APR series include total tilt error motion of 2.0 arc-sec with total axial and radial error motion of just 1.5 microns. Other specification notables include resolution to 0.04 arc sec, and bi-directional repeatability to 0.75 arc-sec.

The APR's direct-drive brushless servomotor is cog-free, allowing extremely smooth velocity performance with rapid acceleration and maximum speed up to 800 rpm. Through the high resolution encoder system and Aerotech's advanced motion controls, position stability performance is unsurpassed.

The range includes standard and calibrated accuracy options, incremental or absolute encoders and a choice of direct-drive motors to match load, torque and speed requirements. The APR series can be supplied for continuous rotation or fitted with limit switches for part rotation from 10 to 270 degrees. Further options include brakes and adjustable mechanical hardstops.

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