miller wildcat 225G no output

[zappa40]

HI,i hhave a wildcat 225g that just quit working all at once,only output is 25 volts on generator or welder we have checked all the obvious things like diods fuses andcompacators even replaced the rectifer and brushes but still only 25 volts output, any ideas of what we could check would be greatly appreciated, thankyou

[slamdvw]

25 v on the a/c power out as well..?

Check for voltage going to the fields ( the brushes ). Do you have a current meter..? If you do, fiddle ( technical term) with the find adjustment and check how much current is going to the fields.

One of the things they mention for 'low output' is engine speed ( other than lack of excitation ). if you have a freq meter, engine speed checking is easy. Running in power mode, should be 3700 rpm, which would be slightly faster than 60Hz.

btw... www.millerwelds.com has owners manuals for download. you'll need the serial number...

From the schematic, not much to go wrong with that machine... let us know.

[MicroZone]

Give Miller a call. They deal with these problems a thousand times a week, day-in, day-out and will get you an answer quickly without having to fiddle with your machine.

Miller Electric Phone: 920-734-9821

[zappa40]

Hi, I had welder checked out and i have a shorted excition coil, problem is miller doesnt have a replacment statorfor this machine ,if anyone has a suggestion where i might get one or possibly have it rewound please let me know. Thankyou

[slamdvw]

kind of a LONG shot... try using 12 volts and feeding it to the rotor, in the welding generator. If I had easier access to my friend's engine drive welder I'd take a measurement for ya.

Might be able to make a power supply to excite the welder part and make it work.

[zappa40]

Good idea it worked to an extent, but after talking to miller teck we actually need 32 volts to excite for full output,does anyone know if it would be possible to install some sort of transformer to boost the 12 volt battery voltage to the 32 we need??? Thanks for the help again

[MicroZone]

Hook 3 batteries in a series to give you 36V.

Like this:


------ neg. IIIIIIIII pos. -------- neg. IIIIIIIII pos. --------- neg. IIIIIIIIIII pos. --------

[zappa40]

Hi, we tried the batterys and it boosted the output some but the ststor overheated,looks like stator needs replaced, miller doesnt have them anymore so if anyone would kow where we might find one please let me know. Thanks again for your help, Mike