Direct-drive stages promise smoother motion
A
Rockwell Automation product story
Edited by the Engineeringtalk editorial team
Oct 5, 2006
Direct-drive rotary stages provide precise positional and velocity control in light to medium force applications.
Complete freedom from backlash, a resolution of 0.2arc-sec and +/-1arc-sec repeatability are among the key benefits offered by Anorad's new DDR-150 direct-drive rotary stages.
Designed to provide precise positional and velocity control in light to medium force applications, DDR-150 rotary stages are ideal for use in semiconductor wafer inspection, precision assembly and laser machining applications.
The high performance of the stages, which have a durable stainless-steel top plate, is achieved by the use of a brushless DC servomotor, high-resolution optical encoder and precision-ground ABEC-7 four-point contact bearings, all housed in a compact and precisely machined aluminium base.
Direct drive by the brushless servomotor offers numerous benefits over conventional gear-driven rotary stages.
In addition to the absence of backlash, these include minimal torque variation and the elimination of concerns over gear and brush wear in long-term usage.
The large servo bandwidth of the units also reduces step and settle time.
DDR-150 rotary stages are available with range of encoder options to suit the speed and accuracy requirements of the application, and are supplied, as standard, with Hall-effect home and limit sensors.
They have an axial through hole to facilitate use with pneumatic and optical devices, and they incorporate a sheet metal cover to protect the encoder and other internal components.
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