MIG welder fault
I've just got an old Cebora 160A MIG welder which was cheap and doesn't work. The cooling fan runs but nowt else.
Looking inside at the transformer, there doesn't appear to by any signs of excess heat. The wire feed motor, contactor and gas valve appear to be all controlled by a small PCB with the wire speed control pot, a couple of 10A relays, a BU348 transistor and a 74HC14.
Does anyone know about old MIG welders? My last one was a small SIP and I remember having to repair the motor control several times during it's life. A circuit for this would be handy, otherwise I'll be drawing one.
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Richard
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