Influence of bearing ball recirculation on error motions of linear axes |
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| Authors: | Gregory W Vogl Kyle F Shreve M Alkan Donmez |
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| Affiliation: | 1. Engineering Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive, Gaithersburg, Maryland 20899-8220, USA (Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States.);2. Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, USA |
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| Abstract: | For positioning systems utilizing linear guides and trucks with recirculating balls, a method is presented that uses the measured total error motions and the measured phase of ball loops within trucks to determine the influence of each ball loop on the error motions. The influence of ball recirculation on the error motions is estimated a priori via a least-squares solution based on data collected from a multitude of motion tests in which varying phases were measured by sensors integrated into the trucks. This method enables real-time estimation of performance degradations and identification of their sources. |
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