Precision positioning of a surface motor-driven multi-axis stage using a surface encoder (2nd report) - Experiment of dynamic micro-positioning

Translated title of the contribution: Precision positioning of a surface motor-driven multi-axis stage using a surface encoder (2nd report) - Experiment of dynamic micro-positioning

Shuichi Dejima, Wei Gao, Hiroaki Yanai, Satoshi Kiyono

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a surface motor-driven multi-axis stage system employing a surface encoder as the position feedback sensor. The surface motor consists of four two-phase linear motors, two pairs in X- and Y-directions. The thrust force generated by each of the linear motor's two phases was investigated for the purpose of constructing dynamic controller of the stage. It was confirmed that the thrust forces of the two phases were sinusoidal functions of positions with a shift in space by one-quarter of the motor pitch length of 5 mm. A simple commutation law was applied to the two-phase forces so that a constant force can be obtained throughout the full range of travel. A PC-based PID controller was designed and constructed for micro-positioning experiments of the stage. Experimental results indicated that dynamic micro-positioning can be carried out independently in X and Y-axes with a positioning resolution of 50 nm.

Translated title of the contributionPrecision positioning of a surface motor-driven multi-axis stage using a surface encoder (2nd report) - Experiment of dynamic micro-positioning
Original languageJapanese
Pages (from-to)433-437
Number of pages5
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Volume69
Issue number3
DOIs
Publication statusPublished - 2003 Mar

ASJC Scopus subject areas

  • Mechanical Engineering

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