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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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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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: Vacuum (HV, UHV, etc.) Magnetic Fields Temperature Moisture External Vibration Piezo stages can be made from various materials such as invar, stainless steel, titanium and aluminum. Each has advantages; however […]

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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 and the wider working bandwidth […]

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Piezo Scanner Settling Time

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 response for 1μm is a […]

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