Category: Piezo Actuators, Motors

From IoT to IoP – the Internet of Smart Piezos

A discussion with leading piezo experts on ceramics, nanopositioning, intelligent piezo systems, and weather stations Q&A with Dr. Harry Marth, Head of Piezo Technology Innovation, and Dr. Mathias Bach, Head of Piezo Systems at Physik Instrumente (PI), Karlsruhe, Germany. Most people would be looking forward to retirement after a successful career of 45 years. But […]

Advances in Piezo Actuators for High Frequency, High Duty Cycle Industrial Applications

1 Introduction Electromechanical conversion in piezoceramic solid-state actuators can generate highly dynamic motion. Rise times significantly less than 100μs and repetition frequencies in the kHz range are state of the art and are used in applications such as fuel injection, ink jet printing, adhesive dispensing, active vibration damping or in adaptive tools. The control frequency […]

Irradiation Tests for Piezo Actuators in SRF Cavity Tuner at LCLS II

Fermilab (FNAL) is contributing to the SLAC Linac Coherent Light Source II (LCLS-II) project with superconducting radio-frequency (SRF) accelerator technology and cryogenics. The LCLS-II will produce a high-power free-electron laser for research from nano/bio-technology to materials engineering. The SRF technology will increase the pulse rate from 120Hz in the current LCLS to 1MHz in the […]

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 […]

Surface Slope Metrology: High Precision Tilt Stage Achieves 30nrad Absolute Accuracy

A recent paper shows significant advances in the accuracy of long trace profilers, auto-collimator based deflectometers, and other surface metrology instrumentation. Scientists at the ALS X-Ray Optics Laboratory, HZB/BESSY-II and PTB devised a new universal calibration method for deflectometers.  One key component in the system is a high accuracy, piezo-motor-driven flexure tilt stage developed in […]

Automation and Microscopy: Faster Test & Measurement, Surface Metrology – Piezo Speed is Enabler for 100% Testing

Everybody who commutes by car is familiar with the concept: constant velocity gets you faster to your destination than stop-and-go traffic. This well-known principle from the macro-world is now employed in the nano-world by scientists from the Fraunhofer Institute for Production Technology IPT in Aachen, Germany. Their solution speeds up microscopic testing of large-surface objects, […]

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 […]

Self-Locking Actuator for Hexapod Applications Combines High Push-Pull Force with Picometer Resolution for Active Optical Alignment in Astronomy

1. Introduction Astronomical telescopes usually employ active position control for primary mirror surfaces using motorized mechanical actuators. The motion needed is generally quasistatic, to compensate gravitational and thermal effects. Another application for precision actuators within the telescope at a significantly faster motion response is the high speed tip/tilt control of a secondary or tertiary mirror. […]

Precision Motion and Positioning Equipment on Mars Rover Curiosity – Still Going Strong

Almost 4 years after Curiosity landed on Mars, it is still up and running – and while it has not discovered current life forms, the basic question whether Mars could have once supported an environment for primitive life forms is a clear “yes”, according to NASA scientists. The rover identified carbon, hydrogen, oxygen, sulfur, nitrogen, […]

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 […]

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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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