Category: Piezo Mechanics

Piezo Flexure Nanopositioning Stages: Frequently Asked Questions

A piezo nanopositioning stage is defined as a positioning device capable of nanometer or sub-nanometer resolution. There are several types of nanopositioners – PI also makes air bearing stages, linear motor stages and magnetic levitation stages; devices featuring the highest dynamics and precision are piezo-driven, flexure guided and equipped with direct metrology position feedback, such […]

Piezo Transducers, Actuators, and Motor Drive Solutions for Medical Engineering

Medical engineering and life-science disciplines have multi-faceted requirements for motion and positioning equipment: the spectrum spans from ultrasonic transducers to simple low-energy drive components to high-precision positioning systems and ultra-fast actuators for valve and pumping applications. Piezoceramic transducers and motor drives meet these needs and have a long track record of reliability and ruggedness in […]

Advances in Piezo Nanopositioning Controllers – Digital vs. Analog

Digital piezo nanopositioning controllers have a reputation for being expensive and only cost efficient in high-end applications. A recent new design approach has changed this situation, making advanced digital control features affordable for main stream piezo motion applications. History of Digital Motion Controllers Position control for magnetic motors has been almost exclusively digital for nearly […]

Accelerated EDM Microstructuring Aided by Electroceramic Transducers

Piezoelectric high-speed motion improves performance of die-sinking EDM in the micron realm. The basic principle of the machining process, now known as electrical discharge machining (EDM), or die sinking, was discovered in the 1940’s by accident, when Russian scientists were trying to prevent the erosion of electrical contacts caused by sparking. Today, EDM is well […]

Methods to Improve Piezo Dynamics, Accuracy and Linearity: Preshaping / DDL / APC

Piezoelectric materials, like most electro-ceramics, do not show perfectly linear displacement behavior compared to the input voltage. Closed-loop operation with position feedback usually takes care of the nonlinearities.  Although perfect settling to the desired position is achieved to nanometric scale in positioning operation, the deviation in dynamic continuous motion operation can in some cases be […]

Overview of Different Piezo Motor Design Principles

The basic principle of the piezo ceramic motor has been known for almost 100 years. However, it took decades to get from an idea to a reliable, industrial product. Just like with electromagnetic motors, many different types have been developed and tested over the years. Today, one can say that piezo motors have become mainstream […]

Ultra-Stable Mirror Mounts for LINC-NIRVANA High Resolution Imager are based on Self-clamping PiezoWalk Motors

An extremely stable motorized mount for initial alignment of two dichroic beam splitters in the instrument was required. The mirrors reflect visible light and transmit the NIR are located close to the pupil plane are very sensitive to tilt and flexure errors which could be introduced to the wave-front sensor. The technical specifications to be […]

Piezo-Mechanisms in X-Ray Spectroscopy: Energy Selection in a Beam Line

PiezoWalk principle shows advantages for Monochromator crystal fine adjustment Piezo-based mechanisms have long been used in precision scientific instruments for precision motion generation. Previously, the limited motion characteristics of simple piezo actuators often made the use of a dual stage coarse/fine approach necessary. A novel approach based on a long-travel PiezoWalk drive shows promise in […]

Fast Piezo Scanning Stages for Pixel Sub-Stepping, Image Resolution Enhancement, Super-Resolution Imaging and Vibration and Shake Suppression

Increasing the Resolution of Optical Sensor Chips: Applications of Pixel Sub-Stepping Optical Resolution in Imaging Low light conditions create difficult conditions for imaging applications from astronomy to microscopy. Low light intensity means neither the resolution of the chip nor the exposure time for changing or moving objects can be freely chosen. Typical applications are fluorescence […]

Performance and Applications of Inertia Based Positioning Drives: Q-Motion

Size matters in miniaturization and automation – smaller is usually better. Traditional electromagnetic motors have limitations when it comes to shrinking dimensions while maintaining high efficiency and accuracy of motion with minimized energy consumption. Piezo ceramic inertia motors can fill this gap. The Q-Motion dubbed miniature direct drives can be employed in linear positioners, rotary […]

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About PI

PI (Physik Instrumente) is a leading manufacturer of precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with fifteen subsidiaries, R&D / engineering on 3 continents and total staff of more than 1,000.

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