How do you achieve “closed-loop?”

Our nanopositioners use piezo actuators to generate motion. The expansion of a piezo actuator is normally proportional to the driving voltage. In an open-loop system a linear voltage is applied for motion control. However, piezo actuators exhibit nonlinearity, hysteresis and creeping, which will be translated as positioning errors in the positioning system. The term “closed-loop” […]

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What materials are your stages available in?

nPoint’s stages are available in Aluminum, Super Invar and Stainless Steel. Assuming the same mechanical design, an aluminum stage will have the highest resonant frequency, which will translate to higher scanning speeds and faster settling times. Aluminum exhibits a high strength to weight ratio making it an excellent choice for weight critical applications (e.g. aerospace). […]

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What are the benefits of flexure stages?

Flexure stages employ a non-conventional ‘flexure bearing’ mechanism in the system, in which the moving platform is linked to a static base by flexure hinges. The platform’s movement, driven by piezo actuators, is guided by the flexure mechanism. The guiding motion is generated by elastic deformation of the flexure material. Therefore, the linkage is friction […]

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