Enhancement of sensor-less tool fracture detection method applying rotational digital filter

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Detection of tool fracture is important to avoid tool breakage and ensure cutting accuracy. Though additional sensors are generally used for monitoring a tool condition, installing them causes high cost and increase of failure rate. In this study, a novel in-process method to detect a tool fracture is proposed on the basis of a disturbance observer theory. It uses only servo information in a ballscrew driven stage and never requires external sensors. Furthermore, a rotational digital filter is invented and applied to drilling tests to improve the detection accuracy. A tool fracture is successfully detected by the proposed method.

Original languageEnglish
Pages (from-to)52-57
Number of pages6
JournalProcedia CIRP
Publication statusPublished - 2012
Event3rd CIRP Conference on Process Machine Interactions, PMI 2012 - Nagoya, Japan
Duration: 2012 Oct 292012 Oct 30


  • Digital filter
  • Disturbance observer
  • Drill
  • Fracture
  • In-process monitoring

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering


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