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Posted: Oct 01, 2010

PI Introduces a Breakthrough Development In Nanopositioning Stage

(Nanowerk News) Piezo system specialist PI introduces a breakthrough development in nanopositioning stage control. The new E-709 provides digital functionality at the price-point of an analog controller, all in the volume of a paperback book! The true digital servo performance comes without compromise:
Features and Advantages
  • 5th order polynomial digital linearization ensures higher accuracy than analog
  • 2 notch filters allow faster response and piezo operation at higher frequencies
  • A fast servo update rate ensures responsiveness
  • DAC-in-the-loop architecture guarantees positional stability
  • Several high speed interfaces: USB, RS-232, Real Time Analog and TTL
  • Easy-to-use setup software for remote access and servo tuning. No trimpots!
  • Extensive, well-documented, interface-independent software support includes Windows .dll, Linux .so, and LabVIEW .llbs
  • Datasheet & More Information:
    E-709 nanopositioning controller
    E-709 nanopositioning controller
    Digital Piezo Control Functionality at a Breakthrough Price – One-Third of the Nearest Competitor
    The E-709 opens up the possibilities of digital control for piezo-driven nanopositioning systems for the same price as analog controllers. It was designed for piezo actuators and nanopositioning stages which low-cost piezoresistive sensors and the higher performing capacitive sensors. The digital servo technology allows higher linearity and precision and provides more control options (changeing parameters on-the-fly, software optimized servo tuning, etc) and very comfortable operation. The E-709 also includes a piezo power amplifier (driver). No additional hardware is required to operate a piezo mechanics.
    Comprehensive Software Support
    In addition, PI provides the full functionality of its comprehensive software packages free of charge. The E-709 can also be used for applications providing analog control signals, as still widely used in microscopy applications. In addition to 2 digital interfaces, a standard broadband analog input is installed as well.
    True Digital or Analog?
    Many "digital" piezo nanopositioning controllers are actually analog controllers with a USB or other communications interface grafted on. The digital command is converted into an analog voltage by a D/A converter that sits outside the servo loop and feeds the analog voltage to the servo. The servo technology in these controllers remains analog (op-amps, capacitors, resistors), with its inherent limits in accuracy, stability and functionality. A true digital controller puts the DAC inside the servo loop.
    Application Examples
  • Bio/Nanotechnology
  • Semiconductor Technology
  • Lithography, Optics.
  • About PI
    PI is a leading manufacturer of piezo systems, nanopositioning controllers, hexapod systems, piezo stages, piezo linear motors and precision motion-control equipment for photonics, bio-nanotechnology & semiconductor applications. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 35+ years. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with eight subsidiaries and total staff of 500+
    Source: PI (press release)
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