Product category:
Industrial Motors
News Release from: PI (Physik Instrumente) | Subject: PI E-710.SCN
Edited by the Engineeringtalk Editorial
Team on 18 March 2003
Smart digital controller for precise
positioning
Polytec PI NanoPositioning Group has a new generation of digital piezo nanopositioning/nanoscanning controllers for applications such as scanning microscopy and surface profiling.
Polytec PI NanoPositioning Group has a new generation of digital piezo nanopositioning/nanoscanning controllers for applications such as scanning microscopy, metrology, surface profiling, material science, nanotechnology and cell tracking The E-710.SCN controllers are available in three-, four and six-channel versions and address the ever growing linearity and speed requirements of today's nanotechnology applications
This article was originally published on Engineeringtalk on 26 Nov 2002 at 8.00am (UK)
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Long range for PZT steering mirror
Polytec PI, NanoPositioning Group, has released what it claims to be the world's longest-range high-speed PZT-driven two-axis mirror scanner.
The need for ever-increasing scanning speeds has led to the development of these new digital controllers.
Conventional PID (proportional integral derivative) piezo servo motion controllers exhibit phase lag and tracking errors due to the nonlinear nature of PZT material and the inherent limitations of the PID controller concept.
With a standard PID piezo controller, tracking errors can be as large as 20% (in closed-loop operation) even at relatively low scanning rates of 5Hz.
This limits both the speed and precision of data acquisition, eg in scanning microscopy applications.
The new PI E-710.SCN controllers use a different, smart digital controller model, reducing nonlinearity and phase lag to indiscernible levels, even with high-frequency dynamic actuation under load.
The effect is an improvement in linearity (usable bandwidth) of two orders of magnitude resulting in significantly increased throughput. Request a free brochure from PI (Physik Instrumente) ...
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