Angular Positioners

 

PRS-1 World's First Direct Drive Piezoelectric Rotary Stage with Zero backlash

Accurate angular positioning is extremely important in many fields including: photonics, life sciences, microelectronics and defense/security. Currently all commercial rotary positioning stages fall into one of three main classes depending on motor type: stepper-motor, vector-motor or DC servo-motor. DTI's newly developed precision piezoelectric rotary stage (PRS-1) is a unique software controlled rotary stage incorporating a proprietary direct-drive motor coupling mechanism. The PRS-1 does not use a conventional electromagnetic motor; instead it uses a highly advanced piezoelectric motor under direct digital signal processor (DSP) control. The result is a superior rotary stage that eliminates the well-known disadvantages of all previous rotary stage technology, while at the same time providing intrinsic design and performance advantages.

Key benefits of the PRS-1 Rotary Stage

 

• Rotational Range 360 deg

• Angular Accuracy 10 µrad (2 arcsec)

• Minimum Angular Increment 20 µrad (4 arcsec)

• Unidirectional Repeatability Less than 10 µrad (2 arcsec)

• Bidirectional Repeatability Less than 10 µrad (2 arcsec)

• Backlash Less than 10 µrad (2 arcsec)

• Hysteresis Less than 10 µrad (2 arcsec)

• Angular velocity from 5 µrad/sec up to 2.1 rad/sec (120 deg/sec)

• Low-voltage design - Entire system uses a 12 Volt DC adapter, or optional Li-ion rechargeable battery pack

• Exceptional long-term stability (@ 20 C) Less than 5 µrad/hour (1 arcsec/hour)

• Superior Tracking Bandwidth 2 kHz

• Auto self-locking when system is de-energized

• High load capacity (up to 20 kg)

• High torque (up to 0.5 Nm)

• Multi-channel configurable

• Vacuum compatible option*

* contact DTI for details