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IndustryArena Forum > CNC Plasma, EDM / Waterjet Machines > General EDM Discussion > High electrode wear and instable burn with thin electrodes on my DIY EDM machine
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  1. #1
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    Join Date
    Mar 2016
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    3

    High electrode wear and instable burn with thin electrodes on my DIY EDM machine

    Hi,

    my newly selfbuild simple R/C EDM machine works well with 'normal' sized electrodes.

    But with my needed slim sheets it only burns very instable and the wear is unacceptable (up to 300% vs Stainless steel (1.4571,V4A)) high.

    The last thing I know to try is milling round E-Cu57 (sheet copper is a different grade?!) rods to sheets, finding the right graphite or try tungsten copper.

    Has somebody any hints for me or is the only possibility for me to build a better pulse EDM ?

    Does anybody know a good description for a pulse EDM matching my demands? (I have the pulse-EDM Book of Ben Fleming but its very complex without a microcontroller)

    To make yourself a picture of my machine, my problems and my demands here is a YouTube Video:

    Thanks for your interest and with best wishes

    Ralf

  2. #2
    Junior Member
    Join Date
    Sep 2018
    Posts
    5

    Re: High electrode wear and instable burn with thin electrodes on my DIY EDM machine

    I spent a few years as a toolmaker using standard manual and CNC EDM machines. There is a reason why fine detailed work needs more control than just your simple R/C setup. Fine work requires precise control of on and off times as well as current, voltage, frequency and polarity. If you simply want to burn out a tap then R/C will probably do. Fine high surface finish work is going to require some pain if you want to build a controller yourself. There is no way around it. It's a complex field with many variables. There are no shortcuts. Congratulations on what you have done so far. A great effort.

  3. #3
    Member
    Join Date
    Oct 2021
    Posts
    3

    Re: High electrode wear and instable burn with thin electrodes on my DIY EDM machine

    Maybe try using edm 244 oil instead of water? Just a suggestion. Also try and add more flushing. Discharge can build up causing erratic burning.

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