Linear Actuator/Manipulator replaces motorized actuators.

Press Release Summary:

Based on Piezo Walk principle, N-380/N-381 NEXACT® ceramic linear motor actuators provide piezo-class resolution below 1 nm and millisecond responsiveness. Piezo Walk drive effects linear motion directly, eliminating backlash and wear. Self-locking when powered down, actuators accommodate virtually unlimited travel ranges due to stepping technology while retaining stiffness. Characteristics include 1 kg push/pull force, 30 mm travel, and 10 mm/sec speed.

Original Press Release:

Novel Piezo Linear Actuator / Manipulator Replaces Motorized Actuators

Auburn, MA, Jan 2009 -- Piezo systems specialist PI will introduce the novel
N-380 / N-381 NEXACT® ceramic linear motor actuators at this year's Photonics West conference in San Jose, CA. The new actuator is based on the Piezo Walk principle and replaces classical lead screw actuators combining high forces and long travel ranges with sub-nanometer resolution in a small package.

Features and Advantages

o 1 kg Push/Pull Force, 30 mm Travel, 10 mm/sec Speed

o Self-Locking, Stiff Design; convenient ½" front mount or clamp mount.

o Stepping Mode + Sweep Mode, Millisecond Response & High Bandwidth

o Non-Magnetic and Vacuum-Compatible Options

Typical Applications:

Micromanipulation & Nanomanipulation, Nanotechnology, Microscopy & Optics, Nano-Imprint, Laser Tuning, Semiconductor Test & Production Equipment, Bio-Technology, Medical Technology.

Piezo-Class Resolution, Low Power Consumption, Long Travel Range

NEXACT® actuators provide piezo-class resolution (far below one nanometer) and millisecond responsiveness. In contrast to conventional piezo actuators, the new stepping technology allows virtually unlimited travel ranges while retaining the high stiffness, in a very small package. The special drive design reduces the operating voltage to 40 V or less, with minimal power consumption.

Very High Stability, Self-Locking, No Wear & Maintenance, No Lubricants

In contrast to DC servo or stepper motor actuators, the piezo walk drive effects linear motion directly, without the need to transform rotation with gears and leadscrews. Backlash and wear are eliminated and the drive is maintenance-free. NEXACT® actuators exhibit high stiffness and are self-locking when powered down with nanometer position stability, and zero heat dissipation or servo-dither at rest.

Working Principle: Piezoceramic Bending Elements Drive a Ceramic Runner

In operation, piezoceramic bending elements act on the ceramic runner, connected to the moving tip of the actuator. For long distance motion, the stepping mode is used. For smaller distances & for ultra-high dynamic motion, the analog (sweep) mode can be employed.

Control Electronics / Software

The actuator can be controlled through USB, RS-232 as well as with a joystick. The controller comes with a variety of software drivers and programming examples.

Proven, Award Winning Technology

N-380 series piezo walk actuators are closely related to PI's award winning, NEXLINE® linear actuator family, the NEXACT® actuators' big brothers.

Datasheets & More Information:

About PI:

PI is a leading manufacturer of piezo systems, piezo stages, linear motors and precision motion-control equipment e.g. 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

USA / Canada:

East: David Rego

Tel: (508) 832-3456

Fax: (508) 832-0506


Midwest Joe McGonagle

(815) 793-3776


West David Steinberg

Tel: (949) 679-9191

Fax: (949) 679-9292



Germany: +49 (721) 4846-0

Italy: +39 (02) 665 011 01

France: +33 (1) 481 039 30

UK: +44 (1582) 764 334


Japan: +81 (6) 6304 5605

China +86 (21) 687 900 08

Stefan Vorndran
Dir. Corp. Product Marketing & Communications
PI (Physik Instrumente) L.P.
16 Albert St.
Auburn, MA 01501
Tel: 508-832-3456,
Fax: 508-832-0506

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