Worm-Drive Rotary Stages Launched By Aerotech
Aerotech has launched a range of precision worm-drive rotary stages featuring large through-apertures and a preload system that provides a high level of accuracy with minimal wear. The AGR series covers five models with internal diameter from 50-200mm and is available with continuous 360deg travel, or with a mechanically limited travel range (down to 5deg). Axial load capacity is up to 570kg and rated speed to 30rpm; and the range includes optional directly mounted encoders for best performance repeatability and negligible levels of hysteresis and backlash. Typical specifications across the AGR series include a 120 arc-sec positional accuracy without encoder fitted and 20 arc-sec when the servomotor mounted encoder option is used. Corresponding without- and with- encoder specifications for bidirectional repeatability are 30 arc-sec and 8 arc-sec. Stage resolution, with a 2500 line servomotor mounted encoder fitted on the largest stage, is 2.1 arc-sec - while the same size stage wi...