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Nanopositioning Stage Operating Conditions
Consideration of the environmental conditions where a nanopositioning system will operate is important to achieve the desired result for a given application. These conditions include: Piezo stages can be made from various materials such as invar, stainless steel, titanium and aluminum. Each has advantages; however it is often important to...
Resonance Frequency of a Piezo Flexure Stage
The first (or lowest) resonance frequency per axis is typically specified for a nanopositioner. The resonance frequency could be of the mode along the motion axis or along other axes including rotation and other complex modes. In general, the higher the resonance frequency of a system, the higher the stability...
Read More about Resonance Frequency of a Piezo Flexure Stage
Two New Piezo Stages from nPoint
The NPXY60-258 and the NPXY60Z20-257 piezo stages are the latest additions to nPoint’s nanopositioning lineup. These stages are designed for advanced research markets in need of UHV and non-magnetic positioning. Middleton, WI – May 14, 2014 – The NPXY60-258 and NPXY60Z20-257 nanopositioners are piezo driven, flexure guided stages, designed for...
Piezo Stage Sensors for Closed-loop Control
A position sensor is necessary to provide closed-loop control for the nanopositioning system. There are different types of sensors that can be used to provide the measuring feedback to eliminate inherent issues with piezos such as non-linearity and hysteresis. Three common types of sensors include capacitive, strain gauge, and LVDT. ...
Settling time is defined as the time it takes for a piezo stage to move to a commanded position and settle to within 2% of its final value when performing a step response. A small signal step response reflects the dynamic characteristics of the system in greater detail. A step...
The term position noise or resolution is a key measurement associated with piezo stages. This measurement is a determining factor of how small a step size can be achieved (the other being controller resolution). Please note that in a piezo flexure stage the limiting factors are different than other piezo...