Electrical Discharge Machining (EDM) Control

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• Introduction Images

• Research Goal

• Developement of a control system which is efficient for EDM
• Developement of a stable feedback system for high voltage
  
  

• Research Statistics

• Research resource: 2 people
• Research term: 2005.2 ~ 2006.5 (16 months)
• My role responsible of this research: 60%
• Research output: Schematics (Used P-Spice), Artwork (Used Or''Cad), Micro-Controller program (Used C language), CNC Control program (Used C language)
   

• Techniques used for this research

• Computer Numerical Control (CNC): CNC refers specifically to a computer "controller" that reads G-code instructions and drives a machine tool, a powered mechanical device typically used to fabricate components by the selective removal of material. CNC does numerically directed interpolation of a cutting tool in the work envelope of a machine. The operating parameters of the CNC can be altered via software load program.  
• Electrical Discharge Machining (EDM): EDM is a machining method primarily used for hard metals or those that would be impossible to machine with traditional techniques. One critical limitation, however, is that EDM only works with materials that are electrically conductive. EDM can cut small or odd-shaped angles, intricate contours or cavities in pre-hardened steel without the need for heat treatment to soften and re-harden them as well as exotic metals such as titanium, hastelloy, kovar, inconel and carbide.
  
  

• My contribution to the research

• Control System: As EDM Machine is operated on high voltage, such as 350V pp, we needed a stable system which was endurable to extreme environment. So I designed the numerical control system and hardware module which was applicable. Using seperate archetecture, I reduced noise that could be happened and delievered to main conroller.  
• Feedback System: Although the main controller is so important in EDM machine, it couldn't operate normally without a good feedback system. Because it is significant factor to response immediately, feedback system is a critical point to improve the functionality. So I designed a powerful signal system that is efficient for EDM machine using control system algorithm.
  
  

• Results