adjustments on hobart?

[swampy]

Hello- just curious if anyone knows if I can adjust the voltage on a hobart g-2235. This is a 200 amp, 1800 rpm, 5kw unit powered by a Wisconsin twin.

The issue I have is I dont know if there is a voltage adj independant of rpm or not.
No load- runs at 63 cycles but only 105 volts.
Loaded- pulls down to 59 cycles and about 92 volts.

I can turn up the rpm, but I figured 63 cycles is pushing it already.
Anyway I have seen old detroit gen units that voltage could be tuned without changing rpm. Can I drop the cycles down to maybe 61 or so and adj voltage up to 115? or is rpm the only thing to play with?

Thanks!!

[1baker016]

I don't think you can, I think this unit has brushes right? If so I would clean the slip rings and make sure that your brushes are riding on the rings properly. Also I would clean all of your electrical contacts, wire brush, put on dielectric grease, and reconnect them. I think you might be getting some voltage drop through bad connections. Your 63 Hz at no load is right, most of these machines are designed this way. Your Hz at 59 under load is also in spec. you have to remember that the welder/generator unit is designed to weld and power lights and or grinders. These are not in need of exactly 60Hz to run. Light bulbs are very tolerent of voltage and frequency changes as are grinders. So I would not be trying to plug in sensitive electronic equipment into this, but motors, regular light bulbs, heating equipment are all ok.