Welder/Generator polarization

JDseller

Well-known Member
My brother just got a very good welder/generator given to him. It has only been used 25 hours. The original owner had it installed as a backup generator. The welder has never been used. The original owner died and his widow never used it. It had not been ran in almost twenty years. It was inside the back of a garage. He got it given to him in return for some house repair work. We drained the gas and cleaned/rebuilt the carburetor. It starts and runs like new. The problem is that neither the welder or the generator will generate current. We took it all apart. The slip rings and winding are perfect. This unit(Lincoln) was new in 1987. It does not have any electronics on it.
I saw a posting last week that referred to a generator or welder losing polarization after setting for long periods. That posting did not go into any details. I searched the old posting and did not find how to do it either. So how do we go about re-polarizing this welder/generator??
 
when a welding machine offshore stops working(welding) we usually clean where the brushes contact. its on the end of the genrator. it usually works
 
Slip rings get an oxide film on them that insulates.Ive started many generators by pressing on the brushes with a pine stick.
 
Take the welding leads and clamp them to one another and rev the engine up fast. This will allow any electricity to flow without any resistance thru all the windings. There will be some residual magnetism in the generator yet and this will create a small current and build in a few seconds and re-polarize the fields. I've done this before many times and works everytime on machines that have set for years. You will hear the engine load up. Then it is time to shut it down. Let us know if you get it going.

John B. in Illinois
 
Look at this and see if it would help you.
http://www.endtimesreport.com/dead_gen.html#110%20volt%20Source
 

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