Oxford controls

[wyn]

Does anyone know what the circled control knob on this oxford welder does.?

I think it might be something to do with voltage, but not really sure.

Thanks.

 

[aero]

50/80/100 volt selector. I'm guessing as you only have 2 welding connections, so that will be to select the output voltage.

 

[wyn]

Thanks Aero, from what i remember it does have three positions.

 

[zardoz]

If you look at a cropped image of my Oxford, you can see the two bottom posts are 80v and 50v. The top one is 0v

If you look at a crop of your image, which i have made less contrasty for a clearer view, you can see they are similar.
If you give it a clean it might even be written on there under the grime.

Sometimes even if a label is missing people will write it on themselves.

 

[wyn]

Thanks Zardoz, it is a three position switch so from your pic and aero's info i think it must switch between the voltages you say.

As for the dust and rubbish that builds up every day so every time it's used it gets wiped off, multiply that by lots of years use and you end up with a nice shiney plate with no writing on it.