New Toy.. No DC welding.. AC Welds good - Help Please - Page 2
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  1. #26
    Join Date
    Nov 2016
    Posts
    121

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    Good evening
    So after I checked the rectifier (it was disconnected when I bought the machine) ... got some education from the nice people on this site!... I found that the diodes were working properly. I do not know why the were disconnected... I re-attached the rectifier, fired the machine up and switched to DC + ... welds like a dream! I love these old copper based machines!
    I wanted to thank everyone for the help and their knowledge! I learned a lot and isn't that what life is all about

    Have a great night!
    Sincerely,
    Kell
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    Name:  7018 weld.jpg
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    Kell in Florida

    Everlast Powertig 200
    Everlast Supercut 51P Plasma

    Several vintage Idealarc 250 Round Tops

    "I don’t care that they stole my idea … I care that they don’t have any of their own."

  2. #27
    Join Date
    Nov 2016
    Posts
    121

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    Here is a picture of the connected rectifier
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    Kell in Florida

    Everlast Powertig 200
    Everlast Supercut 51P Plasma

    Several vintage Idealarc 250 Round Tops

    "I don’t care that they stole my idea … I care that they don’t have any of their own."

  3. #28
    Join Date
    May 2010
    Location
    ct.
    Posts
    976

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    That’s good news. Good job fixing it.
    Miller a/c-d/c Thunderbolt XL
    Millermatic 180
    Purox O/A
    Smith Littletorch O/A
    Hobart Champion Elite

  4. #29
    Join Date
    Jun 2014
    Location
    Southern Illinois
    Posts
    521

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    Great news. Those are wonderful welders. Just for my curiosity, did you check you open circuit voltage after your repair? If it’s close to the spec on the face plate your fine. High OCV indicates the suppressor above the rectifier board is bad. It will still weld but high OCV can be dangerous in certain conditions
    https://uploads.tapatalk-cdn.com/201...68af0fa809.jpg


    Sent from my iPhone using Tapatalk
    Steve

    Miller Dialarc 250 (1990)
    Miller Maxstar 140 STR (2003)
    Lincoln SA200 Redface Pipeliner (1966)
    Lincoln MP210 (2015)
    Victor and MECO torches

  5. #30
    Join Date
    Nov 2016
    Posts
    121

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    Morning Steve,

    Actually I did read something about the OCV and how to check it last week while swimming through Google.. Last night before I re-connected the leads.. I set the dial to it's maximum output on the welder, applied my multi meter and got a reading of 80.2
    From what I have read, this seems to be about right. I am open to second opinions / input from yourself.

    Thanks again Steve.. your time is appreciated!
    Kell
    Kell in Florida

    Everlast Powertig 200
    Everlast Supercut 51P Plasma

    Several vintage Idealarc 250 Round Tops

    "I don’t care that they stole my idea … I care that they don’t have any of their own."

  6. #31
    Join Date
    Jun 2014
    Location
    Southern Illinois
    Posts
    521

    Re: New Toy.. No DC welding.. AC Welds good - Help Please

    80.2 is perfect. Your good to go. Enjoy your classic machine


    Sent from my iPhone using Tapatalk
    Steve

    Miller Dialarc 250 (1990)
    Miller Maxstar 140 STR (2003)
    Lincoln SA200 Redface Pipeliner (1966)
    Lincoln MP210 (2015)
    Victor and MECO torches

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