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SelfA-inclinometer: A novel device for evaluating the accuracy of tilting rotary tables in five-axis machine tools.

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Bibliographic Details
Title: SelfA-inclinometer: A novel device for evaluating the accuracy of tilting rotary tables in five-axis machine tools.
Authors: Takahashi, Naoyuki1 (AUTHOR) takahashi_n@szk.sankyo-seisakusho.co.jp, Watanabe, Tsukasa2 (AUTHOR) t.watanabe@aist.go.jp, Tobita, Kazuteru3 (AUTHOR) tobita.kazuteru@sist.ac.jp
Source: Precision Engineering. Aug2025, Vol. 95, p38-51. 14p.
Subjects: Inclinometer, Machine design, Rotational motion, Angles, Calibration, Machine tools
Abstract: In this study, we developed a compact, high-precision angle measuring device called the "SelfA-inclinometer". The purpose of the SelfA-inclinometer is to enhance the performance of a tilting rotary table, a crucial component of five-axis machine tools responsible for positioning the tilt and rotation axes. This device measures the tilt angle of the working surface of the table, where a workpiece is mounted, as it rotates around the tilt axis. The measurements are highly accurate, providing indicators for improving design, machining, and assembly accuracy. The measuring device comprises a compact self-calibrating rotary encoder (the SelfA), a rotating device, and a precision level. It mounts directly onto the surface to be measured and can measure a wide 360° range with precision on the order of an arc-second (1 arc-second:″ being 1/3600th of a degree). Comparing it with a national standard angle calibration system as a higher-level device revealed a measurement accuracy of ±2 arc-sec or better. Simultaneous measurements were conducted to compare the results with those obtained from a conventional measuring device like a rotary encoder, assessing the validity and superiority of the measurement. • Introducing "SelfA-inclinometer": a compact, high-precision angle measuring device. • Enhances performance of tilting rotary tables in five-axis machine tools. • Measures tilt angle on working surface, aiding design quality & machining accuracy. • Offers wide 360° measurement range with precision to an arc-second. • Confirmed worst measurement accuracy of ±2 arc-seconds in comparative evaluations. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In this study, we developed a compact, high-precision angle measuring device called the "SelfA-inclinometer". The purpose of the SelfA-inclinometer is to enhance the performance of a tilting rotary table, a crucial component of five-axis machine tools responsible for positioning the tilt and rotation axes. This device measures the tilt angle of the working surface of the table, where a workpiece is mounted, as it rotates around the tilt axis. The measurements are highly accurate, providing indicators for improving design, machining, and assembly accuracy. The measuring device comprises a compact self-calibrating rotary encoder (the SelfA), a rotating device, and a precision level. It mounts directly onto the surface to be measured and can measure a wide 360° range with precision on the order of an arc-second (1 arc-second:″ being 1/3600th of a degree). Comparing it with a national standard angle calibration system as a higher-level device revealed a measurement accuracy of ±2 arc-sec or better. Simultaneous measurements were conducted to compare the results with those obtained from a conventional measuring device like a rotary encoder, assessing the validity and superiority of the measurement. • Introducing "SelfA-inclinometer": a compact, high-precision angle measuring device. • Enhances performance of tilting rotary tables in five-axis machine tools. • Measures tilt angle on working surface, aiding design quality & machining accuracy. • Offers wide 360° measurement range with precision to an arc-second. • Confirmed worst measurement accuracy of ±2 arc-seconds in comparative evaluations. [ABSTRACT FROM AUTHOR]
ISSN:01416359
DOI:10.1016/j.precisioneng.2025.04.009