Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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The Analysis of Measuring Error in OMM System

OMM 시스템에서의 측정오차 해석

  • 이상준 (대천전문대학 기계자동차계열) ;
  • 김선호 (한국기계연구원 자동화연구) ;
  • 김옥현 (충북대학교 기계공학부)
  • Published : 1998.05.01
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Abstract

This paper describes an analysis of measuring error of on the machine measuring(OMM) system which directly measures machined surface dimensions using scanning probe on a CNC milling machine. 21 inch TV shadow mask mould clamped to a pallet was measured using PTP(point to point) measuring algorithm in OMM system and the results were compared with those using coordinate measuring machine(CMM). The OMM error was evaluated by probe error, stylus contact error, center shift error, repeatability, work-piece clamping error and etc. The results show that elastic deformation of the pallet is most affecting factor on the measuring error, thus pallet design and clamping method need very careful cosiderations.

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