Three-face step-diagonal measurement method for the estimation of volumetric positioning errors in a 3D workspace

被引:9
作者
Bui, Chinh B. [1 ,2 ]
Hwang, Jooho [1 ,2 ]
Lee, Chan-Hong [1 ]
Park, Chun-Hong [1 ]
机构
[1] Korea Inst Machinery & Mat, Dept Ultraprecis Machines & Syst, Taejon 305343, South Korea
[2] Korea Univ Sci & Technol, Dept Nanomechatron, Taejon 305333, South Korea
关键词
Step-diagonal measurement; Volumetric positioning error; Motion error;
D O I
10.1016/j.ijmachtools.2012.03.005
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, it is demonstrated that volumetric positioning errors can be calculated by measuring the displacements of three face step-diagonals and three additional linear positions. The three-face step-diagonal tests are used in combination with three directly measured linear errors to estimate nine errors in a three-dimensional workspace, including six straightness motion errors and three perpendicular errors. These errors in the workspace were also directly measured to evaluate the estimated errors. The maximum difference between estimated and measured errors was 0.45 mu m for the straightness errors, 2.8 mu rad for the perpendicular errors. Moreover, in practice, the three-face step-diagonal method is easier and faster than direct measurement along each axis and more convenient than the conventional step-diagonal technique. Hence, this method is suitable for industrial applications. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:40 / 43
页数:4
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