Rapid calibration method for measuring linear axis optical paths of computer numerical control machine tools with a lase
- PDF / 4,328,351 Bytes
- 18 Pages / 595.276 x 790.866 pts Page_size
- 108 Downloads / 143 Views
ORIGINAL ARTICLE
Rapid calibration method for measuring linear axis optical paths of computer numerical control machine tools with a laser interferometer Xiaogeng Jiang 1,2 & Tianfang Meng 1,2 & Liang Wang 1,2 & Chang Liu 1,2 Received: 17 February 2020 / Accepted: 17 August 2020 / Published online: 22 September 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract The optical path calibration process using a laser interferometer is time-consuming and tedious, requiring repeated adjustment and experienced operators, leading to a significant reduction in measuring efficiency. A novel optical path calibration process of the linear axis of a three-axis machine tool using a Renishaw XL-80 laser interferometer is proposed in this paper. The homogeneous coordinate transformation error model of the measured axis is established. Using the established error model, only the initial distance from the laser transmitter to the beam splitter and the initial distance from the beam splitter to the linear mirror are required to accurately calibrate the laser beam. The relationship between the fixed distance from the center of the light target to the quarter point on the edge of the light target and the movement distance of the measured axis are obtained. Eight deviations of the optical path affected by the laser transmitter, the beam splitter and the linear mirror are solved. Calibrations based on the deviations can be achieved by adjusting the positions and orientations of the laser interferometer components, leading to a rapid and accurate calibration method for measuring the optical paths. Keywords Laser interferometer . CNC machine tool . Error model . Optical path calibration
1 Introduction Laser interferometry has been used extensively in the precision inspection field such as error measurement and instrument calibration [1–6]. Dual-frequency laser interferometers are a major type of laser interferometry application, which are widely used in error measurement and compensation of multiaxis machine tools and coordinate measuring machines [7–9]. In order to reduce the Abbe error between the optical path and the measured motion axis during the setup process of the laser interferometer system, as well as the cosine error caused by the multi-degree of freedom motion of the measured axis during measurement [10], the optical path of the laser interferometer should therefore be calibrated and adjusted accordingly. However, the optical path calibration and adjustment of the * Chang Liu [email protected] 1
Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tiangong University, Tianjin 300387, China
2
School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
laser interferometer is time-consuming and require experienced operators [11–13]. At present, several adjustment methods are available for optical calibration process. Chen introduced a triangle adjustment method to measure the positioning errors of a machine tool by replacing the magnetic base with a gauge block fr
Data Loading...
