Ultrasonic Motor Powers Linear Positioning Stages

PI has announced the M-692 series of low-profile, ultrasonic linear translation stages designed for high-speed positioning tasks with limited space. These stages are closed-loop, linear motor equipped, micropositioning systems. Two standard versions are available: M-692.1U4 with 20mm stroke and M-692.2U4 providing 90mm. Both versions are equipped with integrated linear encoders for backlash-free positioning. The stages can be arranged to form compact XY systems.

The M-692 design is scalable and can be varied to provide different travel ranges to 300mm for OEM quantities. Vacuum-compatible versions are also available on request. For optimum performance, the C-867 motion controller is available. This ultrasonic motor controller also integrates the drive electronics to generate the ultrasonic oscillations for the piezo-ceramic element. Furthermore, the controller features a number of special characteristics to address the requirements of ultrasonic motors such as continuous automatic drive frequency adjustment and dynamic parameter switching for optimised dynamics and settling behaviour.

Features of these micro-positioning systems include a self-locking at rest function, with no energy consumption, a 14mm profile (0.6in height); and an ultrasonic linear motor that provides velocity to 350mm/s (14in/s). The motors can be used in biotechnology, micromanipulation, microscopy, automation, research and development and quality assurance testing, for example.

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