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My mig stopped working***FIXED***

Discussion in 'The Tool Shed' started by ssped, Jan 28, 2007.

  1. ssped

    ssped 1/2 ton status GMOTM Winner

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    I checked and eveything is working but it is not putting power to the wire. it feeds the wire and the fan is going... any ideas on what and how to check it? it is a century250.

    Thanks

    See the last post. thanks guys.
     
    Last edited: May 24, 2007
  2. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Check your connections where the cables come into a main block. There should be some sort of metal block with two studs and two cables bolted there, I'd check that first.
     
  3. ssped

    ssped 1/2 ton status GMOTM Winner

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    At the transformer? I checked conections to most everything and it all looks tight!
     
  4. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    edit..nevermind
     
  5. camiswelding

    camiswelding 1/2 ton status

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    find the century factory service manual.. hopefully online..
    without it youre flying blind

    begin diagnostics

    1) Discharge the capacitors so it is safe to be inside the machine... if you dont you can receive a hi voltage shock that WILL kill you... do not skip this step... DO NOT SKIP THIS STEP.. if you dont know how to do it you shouldnt be in there
    2)Methodically begin checking all connections, obviously there is power to the machine... but there may not be power to the transformer or capacitors
    3) Next it will be the silcon controlled rectifier and the diodes
    4) Transformer test

    thats pretty much a simplistic diagnostic... the service manual will have the trouble shooting section and wiring diagram which are both invaluable

    Lastly.. welder repair station.. century is an off brand and parts are harder to get... but they are still around...
    IIRC that has a tweeko gun on it ..right? make sure the gun connections are also good.. I suspect they are because you are getting 110v to it...
    it was my first welder...then I went red for life

    btw Lincoln aquired Century in 2003 and now they are begining to look like lincolns... but they have cheaper components inside.. I looked around lincolns site to see if I could find any shop manauls or anything pertinent about them,,,, I couldnt.. google didnt help much either... but give it a shot

    sorry I couldnt be more help
     
    Last edited by a moderator: Jan 29, 2007
  6. ssped

    ssped 1/2 ton status GMOTM Winner

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    Thanks. I know how to discharge Capacitors from a points system. you just toss them to a friend right?:D I looked too for a shop manual and also ran out of luck. maybe I can call Lincoln and see if they have one. It is a Red unit and looks like a Lincoln.
     
  7. SLOK5

    SLOK5 1/2 ton status

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    Check make make sure its full of jet fuel ... regular wont work and that your flaps are down and ready for take off....If all else fails trade it in for a nice F16 of maybe a Apache helicopter.............
     
  8. sgarrison

    sgarrison 1/2 ton status

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    It might be the contactor.
     
  9. darkshadow

    darkshadow 1 ton status

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    my money is on the relay might be dead, mine doesent always work because the relay is bad, and the contacts are worn.
     
  10. ssped

    ssped 1/2 ton status GMOTM Winner

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    What does the relay drive and where is it in the cuircut.
     
  11. ssped

    ssped 1/2 ton status GMOTM Winner

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    Fixed it!

    I contacted lincoln tech support and they knew exactly what to look at. The guy who owned it previously Mickey moused where the hose mounts and gets its power feed right after the rollers. Dumass didnt know what he was doing. The guy on the phone from lincoln was like(there should not be any allen screws there!) Ah ha. I refitted the hose properly and she works great again.:D I am a happy camper again, even though I suck at welding:haha:
     
  12. darkshadow

    darkshadow 1 ton status

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    ah give it time. but a book with pic that show what good and bad welds look like, burn up some wire.
     
  13. ssped

    ssped 1/2 ton status GMOTM Winner

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    I know the difference and am even a certified welder but that was 20 years ago. I just need a bit O practice. I was out yesterday and was able to make some sweet beautiful welds and got it dialed in. today though, is another story. They SUCKED ARSE today.
     
  14. darkshadow

    darkshadow 1 ton status

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    you might need to adjust it every day.

    At the shop I used to work at the power was ALWAYS low in the mornings, you had to crank it up to get it to run right, then later had to drop it back down because it was way to hot :dunno:

    that a little bit in the country so maybe the power lines sucked
     
  15. ssped

    ssped 1/2 ton status GMOTM Winner

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    I am allways working with different metal too so I am alwasy trying to get it right.
     

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