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  1. #1
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    Reduction of welding noise

    Dear all,

    I'm going to build a small controller work in welding environment, and the trouble is the noise in this environment.

    Is there anyone has experience in the welding noise reducing ? Any suggestion is welcome too

    Thanks,

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  2. #2
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    welding noise

    I use a RFI filter in the input sheld all control wires coming from and to your controller and make sure you ground your controller box if it is metal.



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    3 phase mains filter for welding

    In addition, consider fitting a good single-phase/3-phase mains filter on the welder power input and, this is a must, put your controller on a metal (steel) enclosure and connect "good" earth to almost everything you can ..

    Regards,
    IanP



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    electrical noise from welder

    RFI filter in the input sheld all control wires coming from and to your controller

    consider fitting a good single-phase/3-phase mains filter on the welder power input
    I don't get it. A little more special please

    many thanks



  5. #5
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    welding noise level

    Here is what I meant:

    If you have 3-phase welder you will need 3-phase filter, if you have 1-phase welder you will need 1-phase filter, and the most effective option is a 2-stage mains filter .. see picture below ..

    Regards,
    IanP



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  6. #6
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    Re: Welding noise

    I don't know what micro you are using. I have some experience with electrical noise. I did an Industrial washingmachine controller before two years. It had some noise problem while switching inductive loads. I used PICMICRO16F84A. I tried somany filters like snubber network to load and to the control relay coil also. but the result was a big failure. used a CPU powersupply(hope it was filtered) but it increased the noise level. finally I accidently read the internal noise filter portion in the datasheet of 16F628. and I recompiled the code for F628. the result was amazing. I removed all the filters and used normal power supply. it was working perfectly. conclution: 16F84 is not suitable for noisy enviornments. use F628 instead.



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