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Study on high accuracy optical encoder with 30 bits

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4 Author(s)
Kojima, T. ; Dept. of Tech. Manage., Tamagawa Seiki Co. Ltd., xx, Japan ; Kikuchi, Y. ; Seki, S. ; Wakiwaka, H.

This paper describes a fabrication method for a high accuracy disk which has a higher accuracy than a drawing system of an original disk pattern, and development of an optical rotary encoder with a resolution of 30 bits. High accuracy disk technology is the most significant technology regarding fine angular sensors, and it has an accuracy of less than 0.5 μm and 1 sec as it reaches its limitation. However, concerning the disk for an angular sensor it is necessary to obtain a higher accuracy. And then, this study has enabled the creation of a higher accuracy disk and encoder by rejecting disk error which measured at repeatable errors. By using the studied technology, it was possible to make the high a resolution and high accuracy optical encoder with the resolution of 30 bits.

Published in:

Advanced Motion Control, 2004. AMC '04. The 8th IEEE International Workshop on

Date of Conference:

25-28 March 2004

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