Susumu Makinouchi

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INTRODUCTION Interpolation-error is the one of the most important performance parameters of precision encoders. We developed the modulated laser encoder which has high digital resolution (3.8pm) and low interpolation-errors [1]. In order to evaluate the interpolation errors, we introduced a unique error-measurement system using a tuning fork [2]. Advantages(More)
In the past 20 years, control methods for two-inertia systems have gradually changed from semi-closed control to full-closed control in order to achieve higher precision positioning. Though there is a trend toward the expansion of the use of load-side encoders in the industry, we can hardly say that control methods using load-side information are(More)
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