Specializing in Piezo Stages and Nanopositioning Solutions

Piezoelectric Actuators Used in Flexure Stages

nPoint uses piezoelectric stack actuators to provide motion to its flexure stages. These stacks are often referred to as “piezos” and this is what puts the “piezo” in “piezo stage.” Actuators are stacked with multiple piezo tiles to provide larger displacement and hence the term “piezo stack”.  The material used for the piezo tiles is […]

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Custom Programming for Nanopositioning Stages

nPoint uses digital control electronics in its nanopositioning systems. Electrical, mechanical, and software engineering are all done in-house. This flexibility allows for custom development to meet the requirements set forth by an external user. The following provides an example of custom software features programmed at nPoint directly for a customer application. Read: OEM and Custom […]

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OEM and Custom Piezo Stage Development

The goal at nPoint is to meet the specifications set forth by each customer. In many cases, this can be done with nanopositioning systems that have previously been designed and manufactured. There are however, many applications where a custom stage is necessary, such as a component of an OEM product. nPoint works with a variety […]

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Parallel vs Serial Kinematic Flexure Stage Design

When designing piezo flexure stages two examples that dominate mechanical design include parallel and serial kinematics. At nPoint we employ both strategies to meet customer requirements. Testing and calibration are always done with external interferometric sensors regardless of flexure design and feedback sensor choice. Specifications tested in this manner are actual, not theoretical sensor or […]

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How Fast Can I Scan With A Piezo Stage?

Elements of Scan Speed 1. The Loaded Mechanical Resonance of the Piezo Stage2. Use of Controls Such as Notch Filters and PID Settings3. Electrical Current of The Piezo Driver / Controller A typical nPoint nanopositioner consists of a flexure-guided sample platform that is driven by a stack actuator. The motion of the platform is sensed […]

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The New NPXY250-405 Piezo Stage

  The NPXY250-405 piezo stage is the latest addition to nPoint’s nanopositioning lineup.  This stage is designed as an economical XY piezo flexure stage. The NPXY250-405 nanopositioner is a piezo driven, flexure guided stage, designed for economical XY positioning and scanning. Having a position noise of 3nm with strain gauge sensors, this system provides the […]

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Deciding Between Open-Loop and Closed-Loop Piezo Stages

The term “closed-loop” in nanopositioning indicates that a sensor is used to monitor the position of the stage in real time. These readings feed back to the controller to provide error correction for the system. Closed-loop control ensures that the nanopositioner reaches the desired commanded position. nPoint uses interferometric calibration for each stage to confirm […]

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Benefits of Piezo Flexure Stages

Flexure stages employ a flexure bearing mechanism as a foundation for motion control. A moving platform is connected to the static base of the stage by flexure hinges. The moving platform is driven by piezo actuators to achieve desired motion. Guiding motion is provided by the deformation of the flexure material. This linkage is virtually […]

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