Physik Instrumente

Ultrasonic Motion Controller for Precision Positioning Systems and Microscope Stages

Press Release   •   Nov 07, 2011 06:13 EST

Auburn, MA, November 07, 2011 - Piezo motor specialist PI introduces a new 2-axis digital motion controller for ultrasonic high-stability piezo motor stages such as those used on the latest generation microscopes:

Features and Advantages of the new Motion Controller

  • Controller Optimized for High-Stability Ultrasonic Piezo Linear Motors
  • Dynamic Servo Parameter Switching for faster Settling
  • Integrated Drive Electronics for Ultrasonic Motors
  • USB, RS-232 and Joystick Interfaces
  • 4 + 4 Programmable TTL-I/Os for Flexible Automation
  • Data Recorder and Macro Programming Language
  • Extensive Software Support, LabVIEW, DLL, etc

The new 2-axis C-867 piezo motion controller is especially designed for closed-loop micropositioning systems equipped with piezo linear motor drives. It can be operated from a host PC either via a USB port or an RS-232 interface. Alternatively, stand-alone operation is possible by joystick or via preprogrammed macro commands.

Why Ultrasonic Ceramic Motors?

Ultrasonic ceramic motors are non-magnetic and self locking by nature. They provide significantly better position stability than conventional motor / leadscrew drives or magnetic linear motor. A paper documenting long term stability of different positioning stage principles is available here:

Faster Settling with Dynamic Control Parameter Adaption

The C-867 motion control is highly specialized in DSP handles all of the motion properties typical for ultrasonic piezomotors, such as dynamic control parameter adaption. Optimized settling behavior of the mechanics within 10s of milliseconds is achieved by automatically switching between gainsets for dynamic and static operation.

Highest Stability by Automatic Frequency Control

Changes in the mechanical properties of the ceramic motor due to temperature or load changes are automatically compensated for by a control loop which adjusts the operating frequency of the driving voltage. This leads to the highest constancy in motor force, velocity and closed-loop stability.

About PI

PI is a leading manufacturer of piezo systems, linear actuators, linear motors, linear slide and presion motion control equipment for microscopy, bio-nanotechnology photonics and semiconductor applications. The company has 4 decades of motion control experience with OEM and research customers. PI was ISO 9001 certified in 1994 and is present worldwide with eight subsidiaries and a total staff of over 500.

Datasheet & More Information:

Additional information on piezo motors is available at


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