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Command Shaping

Design Features Increase throughput Faster settle time at the work point No additional sensors required Reduced vibration in point-to-point moves Easy tuning Improve Performance Aerotech’s Command Shaping algorithms improve contouring and move-and-settle performance by modifying the commanded trajectory in order to avoid exciting known vibrational modes in the system. Product Spotlight Aerotech’s gantries targeted at…

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Harmonic Cancellation: Optimize Periodic Trajectories, Reject Periodic Disturbances

Design Features Optimize periodic trajectories Reject periodic disturbances Fast and easy setup Adaptable to changes in error source Harmonic Cancellation is available for the A3200 Software-Based Machine Controller, the Ensemble Stand-Alone Multi-Axis Motion Controller and the Soloist Stand-Alone Single-Axis Motion Controller. Optimize Periodic Trajectories Aerotech’s Harmonic Cancellation algorithm dramatically reduces positioning errors on systems with…

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Enhanced Tracking Control (ETC)

Aerotech’s unique Enhanced Tracking Control (ETC) feature improves move-and-settle times in point-to-point positioning and reduces tracking errors during contoured motion. It is available on all Aerotech controllers (A3200, Ensemble® and Soloist®) including our Nmark® CLS high-performance galvo controller. The Enhanced Tracking Control algorithm works in parallel with a conventional Proportional-Integral-Derivative (PID) control architecture and increases the…

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Minimum Incremental Motion and Holding Stability in Beamline Positioning

Background Many beamline applications such as X-ray microscopy and Computed Tomography (CT) require positioning of samples, detectors, and optics in order to perform measurements. Microscopy applications often require imaging of the structure of matter at the sub-micrometer and even nanometer level. Good holding stability, both short-term and long-term, is required because movement of the sample…

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Harmonic Cancellation Algorithms Enable Precision Motion Control

The internal model principle of control theory states that algorithms designed to perfectly reject input signals must contain a model of that input. Feedback control that adheres to this internal model principle has led to the development of harmonic cancellation algorithms and even more complex repetitive controllers. How Are They Useful? Periodic disturbances are commonplace…

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Aerotech’s EasyTune Advanced Autotuning Tool

When a user finds that the accuracy of a motion control application is low, such as unacceptable following error due to friction, low frequency disturbance, etc., they will normally first increase the servo loop gains to reduce the following error. Unfortunately, this “quick fix” can result in excess gains that make the system unstable. In…

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New Data Collection Tool for Complex Positioning Systems at Beamlines

Maximizing measurement throughput is paramount in scientific and industrial applications alike, which is certainly the case with beamline and synchrotron facilities. Beamline and synchrotron facilities allot time to users with the understanding that users will collect all of their data in a given period. A hindrance to this was the slow data collection process implemented…

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