Kistool Powermig 200, Migatronic built

  1. DJHcom New Member

    Messages:
    5
    Location:
    Switzerland - SG
    Hello Forum,
    my name is Dominik, I'm from Switzerland, and my patient is a Kistool Powermig 200 from 1988, built by Migatronic for the Swiss market.

    My machine has the same problem as Jaak had with his. Here is the link to his thread:
    http://www.mig-welding.co.uk/forum/threads/migatronic-166-rally.47289/

    Like his, I have a problem with the board, pictures attached. I've replaced all capacitors with same value ones, I think even the same make - therefor it looks like they're unchanged, but they actually are new.

    And just like Jaaks' ceramic resistors, mine were disintegrated due to age / fatigue.
    Originally, they were MΩ , but due to availability, I've replaced them with Vitrohm type 208-8 resistors.

    The lower one near the edge is a 208-8 R12 10%, meaning it is a 0.12 Ohm resistor with 5 Watts.
    But what is the upper one? The upper one on my machine keeps burning thru, so I cannot read the print on it anymore. You see the burning on my pictures, I used a Dremel with a wire wheel to grind the charring off.

    At this time, I've replaced the upper resistor several times, and currently, the wire feed motor speed cannot be adjusted. The motor turns for 2 seconds, but always at the same speed.

    I must say: I've never tried welding !
    The 2 second problem - I was told - is due to the machine sensing no spark... True?

    No idea if just the speed cannot be adjusted, or else, it won't even weld. I've never bought a bottle and regulator, only a ground cable and a wire package from Abicor Binzel.

    Yes, the machine was meant to be discarded, so the ground wire was cut off on the outside, so with the little stubble that was left inside of the machine, I installed a 13mm standard connector. I think this shouldn't be the problem though, since the machine was discarded as defective.

    Can please, please anybody help me further?

    Kind regards,
    Dominik
     
    • IMG_0262.jpg
    • IMG_3177.jpg
    • IMG_3187.jpg
  2. DJHcom New Member

    Messages:
    5
    Location:
    Switzerland - SG
    Current picture, I've apparently replaced the large capacitor again. Also, the diode just above it looks to be replaced, too.
    Here you can see how hot the upper resistor must have gotten, since it turned darker, and the print is almost gone.
     
    • IMG_5006.jpg
  3. AdrianH Forum Supporter

    Messages:
    1,737
    Location:
    Blackburn with Darwen
    Hi Dominik, You left me a message on Youtube, I just thought I would let you know that I do not have the circuit for that style of control board. I wish you luck in trying to find the information and solution to you machine.

    Adrian
     
  4. DJHcom New Member

    Messages:
    5
    Location:
    Switzerland - SG
    Thank you Adrian for letting me know.
    I still hope I can somewhere find the schematic for this board. This many components overwhelm my somewhat little knowledge of electronics, and Migatronic doesn't want to give it out. They did offer to sell me a new machine - I compared the machines' main schematics, and those are the same, even 30 years later. So I can't give up hope. Thank you again.

    Dominik
     
  5. mechman Member

    Messages:
    1,885
    Location:
    great britain n.e.lincs
    They can be fixed, had something similar with the Migatronic company, sorry it can't be fixed etc you need a new machine, local electronic repair shop fixed it no problem.
     
  6. DJHcom New Member

    Messages:
    5
    Location:
    Switzerland - SG
    Sure, something that breaks can always be fixed, unless of course, it is not feasible.
    Like for example those pod-style coffee machines that you get new for 10 pounds if you also buy 3 packs of coffee pods. I've repaired them, too.
    But I have this 30 year old welder, which is still the same in 2018, just with a sleeker housing. I do want to get this going again.
    Unfortunately, nobody here in Switzerland would touch this, we don't have that kind of "specialists" anymore who can repair electronics without seeing the diagrams. Neither can I, unfortunately. I am here, on a Saturday morning at 4:30 in the morning comparing my PCB to the schematics I've found on this forum. Unfortunately, the MX180 is not the same. I thought, maybe it's just a different layout and connector. Apparently not. Dominik
     
  7. mechman Member

    Messages:
    1,885
    Location:
    great britain n.e.lincs
    Have a look at my posts under Migatronic, mine's a 180 but not the MX it's an auto it's more than 30year old had a bit of a rough life but still going at the moment.
     
  8. slim_boy_fat

    slim_boy_fat Forum Supporter

    Welcome to the forum, @DJHcom :waving:

    I don't understand most of what you say about the machine problem so can't help :ashamed: but wish you success with it.

    If you DO manage a fix please be sure to report how, it could help another Member in the future. :thumbup:
     
  9. DJHcom New Member

    Messages:
    5
    Location:
    Switzerland - SG
    So far, there's little to report.
     
    slim_boy_fat likes this.
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