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Electro-Optic Sensor and System Performance Verification with Motion Systems

This article describes electro-optic (EO) sensors and how to use motion control equipment for their testing. EO sensors and the type of photonics tests employed to verify their performance are discussed, along with fundamental test design rules, best practices for selecting appropriate motion equipment, different ways to precisely steer the EO sensor line of sight…

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How to Manipulate Objects in Six Degrees of Freedom with Hexapods

Hexapods are incredibly useful tools for manipulating objects in six degrees of freedom. As the name suggests, a hexapod is a robot featuring six independently controlled struts that are coordinated to move an object in six degrees of freedom. Those familiar with robotics will know that an object’s position and orientation in space can be…

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The Basics of Scanner Field of View and Strategies for Improving It

You’ve decided your process requires the speed and precision of a galvanometer-based laser scanner and you’re faced with determining which field of view your application will require. Many questions may come to mind, including: “What is a field of view?” “How will my laser and optical equipment affect my field of view?” “Which strategies exist…

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Metal Additive Manufacturing

The State of the Industry Metal additive manufacturing holds tremendous promise in how it will enable the production of components that were previously cost prohibitive or could not be produced with conventional manufacturing processes. As a result, industry and academia are making a concerted effort to further the development of metal additive processes. An increasing…

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Estimating Combined Servo and Galvo Motion Accuracy

In modern motion control systems, the primary figure of merit is often the global accuracy that may be achieved on the workpiece surface. However, when configuring the motion control architecture for more advanced features, such as Infinite Field of View (IFOV), characterizing each element of the systemic errors can be very challenging. This white paper…

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Machine Positioning Uncertainty with Laser Interferometer Feedback

The purpose of this discussion is to explain the major contributors to machine positioning uncertainty in systems with laser interferometer feedback near the work point. We will use an example to quantify these uncertainties in a real implementation of a laser-feedback-driven machine. Laser interferometers are used as a measurement reference for machine correction and accuracy…

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Advanced Motion Control Optimizes Laser Micro-Drilling

In micro-drilling process equipment, the most popular ways to create microvias (blind or buried vias with a diameter ≤150 µm) are mechanical drilling and laser drilling. Mechanical drilling is mainly used in larger apertures such as PCBs or IC substrates. Laser drilling is mainly used in finer apertures such as silicon wafers, ceramic substrates, and…

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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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