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On the Origin of Motion Control Specifications: An Investigation of Repeatability

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On the Origin of Motion Control Specifications: An Investigation of Repeatability

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  • Author: Bing Kongmebhol, Reed Farrar, Thomas Bartholomäus
High-precision motorized positioners are used for a wide variety of applications such as fiber alignment, semiconductor wafer positioning, micro-assembly, and device testing in a number of different industries. When selecting the appropriate positioner for an application, it is common to evaluate them with regard to the product specifications – such as repeatability, accuracy, pitch, roll, and yaw – as supplied by the manufacturer. In particular, users often compare different manufacturers’ products in a "spec-to-spec" comparison. This can be a very risky way to choose a product – especially in the submicron performance range.

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