Another old toy is getting new life

  1. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    About two years ago I bought Cebora tig welder. Came with side panels and top missing, bit of dirt and rust here and there, no earth or electrode holder leads. It was designed to be powered by two phases 440v so first thing I did was to convert it to 240v as I haven't got three phase power supply and it works perfect. Next step was taking it apart then cleaning, redoing all vital connections. Now everything is back together, meanwhile had new panels made and just waiting for them to be powdercoated.
    Here's a few photos DSC_1379.JPG
     
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  2. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    DSC_0943.JPG DSC_0941.JPG About two years ago I bought Cebora tig welder. Came with side panels and top missing, bit of dirt and rust here and there, no earth or electrode holder leads. It was designed to be powered by two phases 440v so first thing I did was to convert it to 240v as I haven't got three phase power supply and it works perfect. Next step was taking it apart then cleaning, redoing all vital connections. Now everything is back together, meanwhile had new panels made and just waiting for them to be powdercoated.
    Here's a few photos View attachment 196373
     
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    fizzy, minimutly, Ali and 9 others like this.
  3. Pete.

    Pete. Member

    Messages:
    9,490
    Location:
    Kent, UK
    Well done Stan. I had one of those as my first TIG welder. You have to carefully set the points gap to 8 thou I think. Also there's no real need to 'convert' it to 240v - it has the facility right there on the terminal block. You just move the jumper wire and you're done. It's limited to about 100amps on 240v though.
     
  4. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    I know what you mean by moving jumper wire but apart from that I also counted turns of windings of main transformer, calculated ratio then made extra tapping on primary coil so I have full power on 240v.
     
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  5. frank horton

    frank horton V twins are great but 4"s rule.........

    Messages:
    2,068
    Location:
    Soon 2 B Crete
    Nice job,
    Can I ask how much u paid for the tin work....
    Have something in mind and b good to have an idea....
    Ta
     
  6. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    If by tin work you mean panels and top I had them made at my workplace (courtesy of mate from cnc depot), powder coating also at work. Can't tell the price as we do favours to each other so no money involved
     
    zx9 likes this.
  7. Pete.

    Pete. Member

    Messages:
    9,490
    Location:
    Kent, UK
    Nicely done, I wish I had thought of that approach myself. If you're able to share that bit of knowledge with some more detail I'm sure it would be appreciated as these are tough old boxes and there are still a good few of them knocking about.
     
    Parm likes this.
  8. arther dailey

    arther dailey Member

    Messages:
    4,113
    Location:
    England
    Stan , as ever evious of these jobs you do, last one I liked was the oxford(?) mig which you stripped down and rebuilt , superb . are you still using that ? Arther :dontknow: or was it migatronic??
     
  9. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    Yes it was migatronic, still got it and not planning to part with.
     
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  10. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    I'll do it, no problem
     
  11. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    As promised I'm posting description of the way of converting my Cebora to single phase. First two steps are well known to most people interested in the topic.
    Step 1:
    As you look at terminal block on top of the auxiliary transformer first three connectors from right to left should be marked 0/220/440, move wires from 440 to 220
    .If second connector is marked 230 or 240
    Instead of 220 it doesn't matter it is still connector that takes wires from 440 one
     
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  12. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    Step 2:
    Take cover off of grey device called,, FART " (I know...) you will see jumper lead that you can slide from 440 to 220, after loosening screws of course and don't forget to tighten them.
     
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    roofman likes this.
  13. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    Step 3:
    You need to know number of turns of primary coil of main transformer. I can't remember exactly what it was but they are fairly easy to count without unwinding coil. Let say that nr is X then divide it by 1.83 that should give you nr Y this is the nr of turns needed for transformer to run from 240V with same power output as if it was run from 440V.
    Because I didn't want to unwind coil to get access to exact turn I just picked closest possible (rather higher than lower) turn(wire) that was easily accessible and gently pulled out a bit big enough to let me solder extra lead (wire), this is our 240V connection. So starting from bottom of the coil wire nr 1 stays connected as it was, wire nr2(new one 240V) goes in the place of wire nr 3(440V) which MUST be insulated, never leave it loose and not insulated. Good way is to put both in marked connector block so they would be easy to swap back in future if needed.
     
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  14. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    This extra soldered wire MUST be insulated after soldering, don't try to push it back in to coil, no need. Just bring it back close as possible but tiny gap left.
     
  15. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    Step4:
    Don't forget to change plug on power supply lead. I put 32A Single Phase on mine.
    I just thought this actually should be step 1
     
  16. stanbester Member

    Messages:
    76
    Location:
    United Kingdom West Yorkshire Halifax
    Now I think I should start this description with reminder or warning :
    Your machine MUST be unplugged from power supply during this process
    And if you don't feel confident let do it someone who is
    HIGH VOLTAGE ⚡!!!
     
    minimutly likes this.
  17. Pete.

    Pete. Member

    Messages:
    9,490
    Location:
    Kent, UK
    Nice one Stan. So obvious when you point it out, tapping half way through the windings. Thanks for the follow-up.
     
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