Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)

  • 2005.06a
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  • Pages.1555-1558
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  • 2005
  • /
  • 2005-8446(pISSN)
Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Drilled Hole Variation of Air Bearing Spindle for PCB according to RUNOUT

PCB드릴링용 공기베어링 스핀들의 런아웃(RunOut)에 따른 가공 홀의 형상변화

  • 배명일 (충남대학교 공과대학) ;
  • 김상진 (충남대학교 대학원 기계공학과) ;
  • 김형철 (충북과학대학 기계자동차과) ;
  • 김기수 (충남대학교 기술교육과)
  • Published : 2005.06.01
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Abstract

In this study, we measured cylindricity and Runout of the air bearing spindle, and tested PCB(printed circuit boards) drilling with 0.4mm micro drill at 90,000rpm and 110,000rpm in order to obtain drilling hole error. Results are as follows; The air bearing spindle's Runout was not so high within $10\mu{m}$ from 20,000rpm to 80,000rpm but it grew after 80,000rpm. Drilling hole size error was 9% at 80,000rpm and 12% at 110,000rpm because of spindle's Run out. Drilled hole shape falsified more 110,000rpm than 90,000rpm.

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