Monitoring, modeling and control of EDM

W. M. Wang, K. P. Rajurkar

Research output: Contribution to conferencePaperpeer-review

10 Scopus citations


This paper introduces recently developed EDM gap monitor, a model reference controller, and a self-tuning regulator for EDM servo adaptive control to over come the practical difficulties of poor flushing condition encountered during many EDM operations and to improve the machining stability. In the EDM gap monitor, the high frequency detecting technology has been used to identify discharge conditions for on-line monitoring EDM process. The first control system on-line adjusts the servo reference voltage of the EDM machine according to a model reference adaptive control law to achieve optimal gap geometry to improve the flush condition of the machining. In the second control system a high speed microcomputer, IBM PC 386, directly regulates the servo feed speed, instead of servo reference voltage to improve the process stability. The control strategy is developed with a real-time achieved stochastic model to minimize the variance of the controlled process and to increase the machining speed with the control interval time of 2 milliseconds.

Original languageEnglish (US)
Number of pages14
StatePublished - 1990
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Dallas, TX, USA
Duration: Nov 25 1990Nov 30 1990


OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityDallas, TX, USA

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering


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