Evaluations of spark distribution and wire vibration in wire EDM by high-speed observation

A. Okada, Y. Uno, M. Nakazawa, T. Yamauchi

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)


In fine wire EDM using thin wire electrode, uniform distribution of spark location is necessary to achieve stable machining performance. However, it is difficult to precisely evaluate the distribution of spark location by the conventional branched electric current method when the workpiece is thin. A new evaluation method by using a high-speed video camera is proposed. The locations of spark are measured by analyzing the recorded images. Then the effects of machining parameters, such as servo voltage, pulse interval time, wire running speed and others on the distribution of spark location are investigated. The possibility of evaluating the wire vibration is also discussed.

Original languageEnglish
Pages (from-to)231-234
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Issue number1
Publication statusPublished - 2010


  • Analysis
  • Spark location
  • Wire EDM

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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