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Posted: January 7, 2008

Zero-Wear Piezo Flexure Actuators Replace Classical Leadscrew Actuators

(Nanowerk News) Piezo specialist PI’s flexure-based piezo actuators such as the P-601 series provide up to 10 times larger travel ranges than classical piezo stack actuators a in low profile package, with virtually unlimited resolution and lifetime.
The stiff construction allows for fast response with rise times much shorter than one millisecond. The design involves no friction, no lubricants and no wear.
Because of the many advantages over motor/leadscrew-driven positioners, more and more flexure actuators are used in fast-valve actuation mechanisms, and for other precision positioning tasks, ranging from automotive to data storage and biotech applications.
piezo flexure actuators
Several piezo flexure actuators shown with the E-831 driver module
Features & Advantages:
  • Flexure Guidance for Frictionless, Ultra-Straight Motion
  • Low Cost, OEM Piezo Driver Modules also Available
  • Low Profile, High Stiffness, Travel Ranges to >1000 µm feasible
  • Closed-Loop Control, Resolution Better than 1 Nanometer
  • PICMA® Long-Life Ceramic Encapsulated Piezo Actuators
  • Optional Vacuum and Non-Magnetic Versions
  • Fast Response, < 1 Millisecond Feasible
  • Typical Applications: High-Speed Valve Control, Photonics, Clean Room Micro-Manufacturing, Laser & Spectrometer Tuning, Medical Instrumentation, Nanotechnology, Auto Focus, High Throughput Screening, Micro-Dispensing.
    Lifetime
    The lifetime of the actuators depends mainly on the integrated piezo-ceramic “motion engine”. Here, the latest ceramic encapsulated low-voltage multilayer piezo stacks provide protection from humidity and moisture, and deliver up to 10 times longer service life than the still widely used epoxy-coated multilayer piezo stacks. A preload protects the ceramics from tension forces during dynamic positioning.
    Easy Mounting and Integration, no Guiding System Required
    The latest flexure actuators already incorporate a precision frictionless guiding mechanism. When integrating the actuators into a positioning system, no extra linear bearings or roller bearings are needed, saving further cost and space.
    Vacuum Compatible and Non-Magnetic Designs
    Piezo flexure actuators require no lubricants, and if ceramic encapsulated piezo ceramics are used (no outgassing / high bakeout temperatures) they are ideal for ultra-high-vacuum applications. Non magnetic designs are also available.
    More Info
    http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=202600
    http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=201900
    http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=202300
    http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=601950
    About PI
    PI is a leading manufacturer of nanopositioning and precision motion-control equipment for photonics, nanotechnology, semiconductor and life science applications. PI has been developing and manufacturing standard & custom precision products with piezoelectric 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
    Source: PI