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regulating welding current

regulating welding current

regulating welding current

(OP)
Greetings, My question involves finding the most appropriate point to regulate welding current remotley on an older shunt regulated transformer type welder. I have added a high frequency generator and am tig welding with it but need to be able to regulate the amperage "on the fly" with a foot pedal or other means. Since the shunt must be loocked during welding, I will preset the basic range with the shunt, but must then make fine adjustments while welding to compensate for the progressivly hotter base metal etc. Can I regulate the input line voltage with a rheostat? Can I regulate the output current with a rheostat? Any help would be appreciated.
OTTO

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