Process monitoring of electrochemical micromachining

A. K.M. De Silva*, J. A. McGeough

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


Electrochemical micro-machining (ECμM), utilises very small inter-electrode gaps (< 20 μm) in order to obtain the accuracies necessary. The narrow gaps make the control of the process much more complex than normal ECM. Furthermore, difficulty in gap flushing leads to an increased tendency to cause electrical discharges, which is highly detrimental to the process. In order to formulate spark prevention and gap control strategies, this paper investigates the discharge mechanism in narrow electrolytic gaps. A monitoring method using radio frequency emission is given, which together with the current and voltage signals, identifies more clearly the events occurring within the gap.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalJournal of Materials Processing Technology
Issue number1-3
Publication statusPublished - Apr 1998


  • ECM
  • Gap monitoring
  • Micro-machining

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering


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