Wiring/control for dual alternator setup in patrol
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I have tried the direct connection to battery welder method and found I needed at least 24V to maintain the arc, and 25v gave a bit too much spatter, however if you were really after deep peno welds in a single pass it would be good. i only tried with 2.5mm rods. I have heard this is really not a long term or sustainable proposition as the shorting does eventually damage the batteries, however i am guessing for an emerg repair it would have little impact.
The Uniwelder Alternator i have and didn't have much luke with looks like a standard 80A Hitachi Frame alternator, however it has 3 big plates of diodes on the back of it and requires a cooling horn to funnel the air over the windings and diodes. When it was tested by the autoelec it would barely generate a spark with the rods, at any speed, so i am still guessing as to what the problem was, even after it was rewound. The literature and experiences of others attest to them being really good devices and they have a 240V output as well.
The mig welder also seems to operate better on 24v as well. It can run on flux core of gas wire.
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