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Thread: Welding Pulse Monitor

  1. #11
    Supporting Member chy_farm's Avatar
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    chy_farm's Tools
    Hi FEM2008, thank you for words. Glad to know you have been somewhat linked to the excellent manufacturer!
    Chy

  2. #12
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    Carnel's Tools
    OK, Chy-Farm, your "old analogue welder" is already a more sophisticated electronic device. Now I can better understand your post. Thank you for your explanation.

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    chy_farm (07-30-2020)

  4. #13
    Supporting Member chy_farm's Avatar
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    chy_farm's Tools
    A small tip about an oscilloscope that I need in this.

    Some of you may feel it's too costly to buy an oscilloscope for a sort of small job like this, namely to see the wave forms of your welding. Then I think I can recommend a cheapest one like the one I use on another tool I posted here;
    Welding Pulse Monitor-oscillo_monitors.jpg
    (Variable Frequency Drive for a larger factory fan)

    I got this (the one you see at the upper part of my VFD) new but it still does not cost too much, nearly $40 or less.
    Oscilloscope for this welder-purpose does not require too big features. We want it to see only very low frequencies like 1Hz to 1kHz (this means it's not pricey though), but one thing we need is that it must have a 'Hold Button' to keep the view when you want to stop its detection.

    Chy
    Last edited by chy_farm; 07-31-2020 at 12:28 AM.

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    Carnel (07-31-2020)

  6. #14
    Supporting Member tonyfoale's Avatar
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    tonyfoale's Tools
    Quote Originally Posted by chy_farm View Post
    A small tip about an oscilloscope that I need in this.

    Some of you may feel it's too costly to buy an oscilloscope for a sort of small job like this, namely to see the wave forms of your welding.

    Chy
    Probably the cheapest oscilloscope is software on a laptop which plots the input on the microphone jack. Unfortunately the frequency response would probably not extent down to the 1 Hz range.

    Other cheap options include Arduino (and similar micros) based scopes, either stand alone with a dedicated TFT screen or even cheaper using a laptop for display and signal processing.
    There are many examples of how-to on the net.

    A big step up the food chain are oscilloscope boxes that connect to a laptop. I use a "Picoscope" which start from around USD 120+ and go up to $1000s. These are full featured scopes but with the advantage over dedicated scopes that the software has more processing power available from the PC.

    Welding Pulse Monitor-picoscope.png

  7. #15
    Supporting Member chy_farm's Avatar
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    chy_farm's Tools
    Showing a sample of usage for this tool in my another thread below;
    Adding Digital Generators to an Old Analogue TIG Welder

    in which I used a comparison data of this;
    Welding Pulse Monitor-dc_600-750hz_comp.jpg

    Hope this can help your welding.

    Chy

  8. #16
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    Could you just post the make/model of your welder?

  9. #17
    Supporting Member chy_farm's Avatar
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    chy_farm's Tools
    Quote Originally Posted by Tooler2 View Post
    Could you just post the make/model of your welder?
    Good evening Tooler, if you mean you want to see my old welder the set-up, see this pls;
    Adding Digital Generators to an Old Analogue TIG Welder

    Chy

  10. #18
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    I would prefer a link to the manufacture's page describing the welder, or a make/model that I can google search.

  11. #19
    Supporting Member chy_farm's Avatar
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    chy_farm's Tools
    Quote Originally Posted by Tooler2 View Post
    I would prefer a link to the manufacture's page describing the welder, or a make/model that I can google search.
    Good morning Tooler, they do not have a site for this old welder made in early/mid 90's.
    Instead I have a copy of the manual here, posting a couple of meaning page out of it. Try read them with your good imagination!

    Welding Pulse Monitor-hitachi-adgp-300a-1990_01.jpg

    Welding Pulse Monitor-hitachi-adgp-300a-1990_02.jpg


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    Last edited by chy_farm; 08-02-2020 at 06:09 PM.

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