Development of a simple test device for spindle error measurement using a position sensitive detector

Liu, Chien-Hung; Jywe, Wen-Yuh; Lee, Hau-Wei

doi:10.1088/0957-0233/15/9/009

Cited by 48 publications

(25 citation statements)

References 9 publications

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“…In the past, many researchers studied the techniques of multi-degree-of-freedom measurement (MDFM) on the geometric errors of the rotary stage. Liu developed the error motion and the angular indexing measuring devices using position sensitive detectors (PSDs) and diffraction grating [5]. Jywe established a novel technique using diffractive grating and PSDs to calibrate the 4-DOF errors of a rotary table [6].…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Angular Indexing Error of a Gear Measuring Machine

et al. 2018

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Featured Application: The method introduced in the paper can be applied to, and can increase angular indexing accuracy of, all machines equipped with a mandrel to rotate the workpiece, such as gear measuring machines (GMMs), gear grinding machines, polygon grinding machines, cam grinding, and measuring machines. Abstract:In gear measuring machines (GMMs), the tested gear is mounted on a mandrel, which is pivoted at both ends by two centers in a vertical arrangement. The upper center is fixed and the lower center is driven by the spindle of rotation. The coaxiality error between the central line of the mandrel and the spindle average line of a GMM always exists in terms of the offset and angle measured in one plane. Such a coaxiality error would cause an angular indexing error of tested gear resulting in measurement error. This phenomenon has rarely been investigated. In this paper, a GMM is taken as an example and its coaxiality error of the mandrel and spindle error of the rotary stage are measured. The difference of rotated angles between the mandrel and spindle is theoretically analyzed by derived formulae. Calibrated by a precision polygon and an autocollimator, the predicted angular index error of the mandrel was consistent with experimental results. Through the experimental verification, it was found that, when the coaxial deviation between the two centers was 10 µm and the lower center tip's radial motion error was 1.6 µm, the angular indexing deviation of the mandrel was ±5 . If the errors were compensated according to the analyzed model, the residual error was reduced to ±2 . A significant improvement in the angular positioning accuracy of the GMM can be achieved.

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Section: Introductionmentioning

confidence: 99%

An Analysis of Angular Indexing Error of a Gear Measuring Machine

et al. 2018

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“…An optical measurement system consisting of a laser diode and position-sensitive detectors is used for measuring the spindle error during motions in high-speed conditions [4]. A laser interferometer is used for measuring the spindle rotation errors such as the radial motion error and axial motion error in a lathe [5].…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Spindle Radial Error Evaluation Using a Machine Vision System

Kavitha

2017

Metrology and Measurement Systems

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The spindle rotational accuracy is one of the important issues in a machine tool which affects the surface topography and dimensional accuracy of a workpiece. This paper presents a machine-vision-based approach to radial error measurement of a lathe spindle using a CMOS camera and a PC-based image processing system. In the present work, a precisely machined cylindrical master is mounted on the spindle as a datum surface and variations of its position are captured using the camera for evaluating runout of the spindle. The Circular Hough Transform (CHT) is used to detect variations of the centre position of the master cylinder during spindle rotation at subpixel level from a sequence of images. Radial error values of the spindle are evaluated using the Fourier series analysis of the centre position of the master cylinder calculated with the least squares curve fitting technique. The experiments have been carried out on a lathe at different operating speeds and the spindle radial error estimation results are presented. The proposed method provides a simpler approach to on-machine estimation of the spindle radial error in machine tools.

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“…Many different methods and model of spindle deformation measurements have been provided [11][12][13]. As the rotation speed of a machining center spindle is in the order of 15000 r/min, high-frequency response sensing methods are required for spindle error measurement [14]. Laser-based measurement techniques could meet the needs of the measurements and have already been used [15,16], but it requires accurate calibration as the output characteristics of the laser beam is nonlinear with respect to the deformation of spindle due to the reflectivity of the target surface installed in the spindle [1].…”

Section: Introductionmentioning

confidence: 99%