Open AccessMeasurement of Machine Tool Two-Dimensional Error Motions Using Direction-Regulated Laser Interferometers
Author(s) -
Daichi Maruyama,
Soichi Ibaraki,
Ryoma Sakata
Publication year - 2022
Publication title -
international journal of automation technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.513
H-Index - 18
eISSN - 1883-8022
pISSN - 1881-7629
DOI - 10.20965/ijat.2022.p0157
Subject(s) - laser tracker , interferometry , astronomical interferometer , position (finance) , tracking (education) , measure (data warehouse) , laser , linear motion , computer science , optics , machine tool , algorithm , control theory (sociology) , physics , computer vision , motion (physics) , artificial intelligence , engineering , control (management) , psychology , mechanical engineering , pedagogy , finance , database , economics
The volumetric accuracy of a machine tool generally changes with time. Its periodic check, performed at a user’s site in a semi-automated manner, can be a key to ensure a sufficient volumetric accuracy in the long term. A laser interferometer can only measure the linear positioning error motion of a linear axis. This paper proposes a scheme to identify all the two-dimensional (2D) error motions of two linear axes in a plane based on a set of distance measurements using only a laser interferometer. Unlike conventional tracking interferometers, the proposed scheme requires only a numerically controlled rotary table on which a laser interferometer is mounted. It regulates the laser beam direction based on the command target position in an open-loop control manner. This paper presents an algorithm to identify 2D error motions of two linear axes by performing only a single tracking test, in addition to the direct measurement of linear positioning error motions of two linear axes. The experimental comparison of the estimated error motions with their direct measurements is presented. The uncertainty analysis is also presented.