Assessment of non-rigid body, direction- andvelocity-dependent error motions and their cross-talk by two-dimensional digital scale measurements at multiple positions
Precision Engineering 66 巻
144-153 頁
2020-06-13 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Assessment of non-rigid body, direction- andvelocity-dependent error motions and their cross-talk by two-dimensional digital scale measurements at multiple positions
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| 作成者 |
Hiruya Mashu
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| 収録物名 |
Precision Engineering
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| 巻 | 66 |
| 開始ページ | 144 |
| 終了ページ | 153 |
| 抄録 |
The conventional volumetric error compensation for a machine tool is based on the machine's kinematic model, which formulates the tool center point (TCP) position based on the assumption of rigid-body motion of each axis. Particularly in large-sized machine tools, error motions that do not satisfy this assumption may have a significant impact on the machine's overall volumetric accuracy. In addition to position-dependent quasi-static error motions included in the conventional kinematic model, this paper proposes a scheme to assess quasi-static cross-talk between axes and direction- and velocity-dependent error motions. This paper proposes test procedures to measure two dimensional (2D) contour error trajectories by using a 2D digital scale (cross grid encoder). Unlike many previous works, this paper proposes to perform the tests at multiple positions over the machine tool's entire workspace, and the error motions are assessed by comparing contour error profiles. An experimental case study on a large-sized bridge-type vertical machine tool shows that such influences can be significant error contributors. The proposed tests can assess error motions only at discrete points where a 2D digital scale is installed. It can be applied as accuracy inspection to ‘‘roughly’’ assess the machine's volumetric accuracy by using a 2D digital scale only, but it is generally not for the compensation.
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| 著者キーワード |
Machine tool
Two-dimensional digital scale
Cross grid encoder
Volumetric accuracy
Measurement
Kinematic model
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| 内容記述 |
This work was in part supported by NSK Foundation for the Advancement of Mechatronics in 2016. Heidenhain supported this study by providing a 2D digital scale, KGM282.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
Elsevier
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| 発行日 | 2020-06-13 |
| 権利情報 |
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
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| 出版タイプ | Author’s Original（十分な品質であるとして、著者から正式な査読に提出される版） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0141-6359
[DOI] 10.1016/j.precisioneng.2020.04.008
[DOI] https://doi.org/10.1016/j.precisioneng.2020.04.008
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| 備考 | The full-text file will be made open to the public on 13 June 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving' |
