Miller welder ID

Fellow has a Miller Engine powered unit, trying to ID it.
Looks like a Wildcat
Teccumseh OHV engine
DC output
S/N jb516058
Looks like about 200 amp
Owner claims it is a "2E"
Pretty beat up, someone messed with the wiring. I really don't want to
start in on it without some documentation
Comments?
Reply to
RoyJ
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You gotta have some pictures.
Reply to
Ignoramus26765
Roughneck 2E
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But this one has some massive diodes and is marked '+' and '-'
Reply to
RoyJ
Sounds like someone converted it to DC. Welding machines designed for DC, especially DC produced from single phase (as produced by the Roughneck 2E), will have an output inductor (AKA smoothing inductor) to keep the arc going reasonably steady while the AC input to the rectifier goes through the zero crossing. A good AC to DC conversion will also install this inductor; if your machine does not have it, then it is not a very good conversion and you will probably not like welding with it. If it does have an inductor it might be a decent conversion worth trying as is.
It should be easy to convert back to AC - remove the diodes and return the wiring to that shown in the manual.
Reply to
Glen Walpert
Appears to have factory stock inductor and diodes. Front panel does not quite match the manuals.
Reply to
RoyJ
The DC version of this machine was the 2F:
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Possibly the rectifier and inductor for a 2F was installed in a 2E?
I would be inclined to sketch up the actual wiring diagram by marking up either the 2E or 2F wiring diagrams, and try and fix it.
Reply to
Glen Walpert

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