Redundancy-enabled stabilisation of linear encoder performance: The biSLIDER

Linear encoders are widely used in industry particularly for machine tools. Their performance may suffer thermal and mechanical instability. This paper presents a technique to stabilise the performance over time by recovering to a reference state. It is based on the simultaneous readings of two head...

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Bibliographic Details
Published inCIRP annals Vol. 67; no. 1; pp. 531 - 534
Main Authors Balsamo, Alessandro, Francese, Claudio, Ottone, Renato, Piccato, Aline
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2018
Subjects
Compensation
Encoder
Redundancy
Redundancy
Encoder
Compensation
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Summary:Linear encoders are widely used in industry particularly for machine tools. Their performance may suffer thermal and mechanical instability. This paper presents a technique to stabilise the performance over time by recovering to a reference state. It is based on the simultaneous readings of two heads separated by an invariant spacer. It requires off-the-shelf components only and is widely applicable in industry. Experimental results in the field and in lab show excellent error recovery even in the presence of highly nonlinear errors.
ISSN:0007-8506
DOI:10.1016/j.cirp.2018.04.004