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Vertical machining center accuracy characterization using laser interferometer: Part 1. Linear positional errors
Journal article   Peer reviewed

Vertical machining center accuracy characterization using laser interferometer: Part 1. Linear positional errors

Anthony Chukwujekwu Okafor and Yalcin M Ertekin
Journal of materials processing technology, v 105(3), pp 394-406
29 Sep 2000
DOI: https://doi.org/10.1016/S0924-0136(00)00661-0

Abstract

CNC machine tool accuracy Error modeling Error prediction Laser interferometer Thermal and geometrical errors
This paper presents the results of accuracy characterization of a Vertical Machining Center (VMC) in the form of linear errors and temperature variation using a low powered He–Ne laser (Renishaw ®) calibration system along with environmental controller unit. The machine investigated is Cincinnati Milacron Sabre 750 three axes CNC VMC with Acramatic 2100 CNC open architecture controller. Temperature distribution of the machine was measured using three temperature sensors strategically attached to predetermined locations on each axis guides. The accuracy of the VMC is characterized in the form of geometric and thermal errors as a function of machine tool nominal axis position, temperature distribution and environmental effect (air temperature, air pressure and relative humidity). Results show that axis drive motors are the major heat sources. Linear positional accuracy is best when the machine is in cold condition and deteriorates with increasing machine operation time for all three axes. X-axis had worst linear displacement accuracy and maximum reversal errors among the three axes being tested.

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49 citations in Web of Science
65 citations in Scopus

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Web of Science research areas
Engineering, Industrial
Engineering, Manufacturing
Materials Science, Multidisciplinary
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