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Publication Date: 12/1/2012
Archive >  December 2012 Issue >  electronica Product Preview > 

3 Piezo Motor Technologies Explained in New PI Catalog
Piezo motors catalog and brochure.
Auburn, MA — PI has released a new catalog of its piezoelectric motors. The 70-page brochure covers three different types of piezo motors — inertial motors, often referred to as "stick slip" motors; ultrasonic motors; and stepping (walk) type motors.

In addition to applications and commercially available products with drawings and technical data, background information on the operating principles and physics behind of each type of motor is available. All three types of piezo motors are self-clamping at rest (no energy consumption, very high stability) and the technology is

intrinsically non-magnetic and vacuum compatible. These novel motors and actuators are also available fully integrated in precision positioners from miniature linear stages to 6-axis Hexapods and Z/tip/tilt platforms.

Inertial stick-slip motors are very compact and economical. Their motion is based on a piezoceramic element that expands slowly and then retracts very quickly. Due to their small size they lend themselves to the integration into miniature positioning stages, such as linear and rotary positioners. PI's latest generation achieves a breakthrough in speed — up to 10mm/sec and provides forces to 10N.

Ultrasonic motors (resonant piezo motors) provide the highest velocities, typically from 100mm/sec to 1000mm/sec. Their motion is very smooth, and forces on the order of 5 to 15 N are typical. Piezo Stepping Motors (PiezoWalk®) are the most complex of the three motor types. They are based on several preloaded actuators performing coordinated motion similar to the way humans walk. PiezoWalk motors are very robust and can provide high forces to 800 N. In addition to a long-range step mode a high dynamics sweep/scanning mode is also available, enabling picometers of resolution and kHz range bandwidth.

Applications include semiconductor test and metrology instrumentation, aerospace, high energy physics, optics and photonics, precision motion control, and microscopy. The piezo motor brochure can be downloaded at:

Contact: PI (Physik Instrumente) L.P., 16 Albert St., Auburn, MA 01501 508-832-3456 fax: 508-832-0506 E-mail: Web:

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