Aerotech (Pittsburgh, PA) released the ALAR series of direct-drive, large-aperture rotary stages. Coming in five aperture sizes (100, 150, 200, 250, and 325 mm), the units are designed for angular positioning and velocity control, and feature zero backlash, no gear wear, or gear vibration. Features include 45 – 300 rpm continuous rotation speed, continuous or limited travel, axial load capacity of 300 – 1,000 lb, and low wobble. Vac 10 – 6 torr compatible versions are available. The stage is 65 – 160 mm tall. Two configurations, standard profile (SP) and low profile (LP), are available.