an old welder (with armature)

CNC Dan · Feb 7, 2015

Sodo said:
Theres a 3-phase swing crane and a traveling gantry crane nearby (but no outlets!). Could that plug be anything other than 220v single phase?

I saw that too. Looks like a 220 volt 'crowfoot' plug to me.

Shield Arc · Feb 7, 2015

That doesn't mean someone didn't try to hook it up to single phase. But like I said I don't know if they're 3-phase or single phase.

One thing I do know, they have a very sweet arc!

But very high pitch scream to them.

notme · Feb 7, 2015

ive used these quite a bit years ago...I don't remember the scream? but I do remember one smooth steady arc! they were great welders! im thinking the problem was too many moving parts and as they wore out they were replaced with cheaper transformer machines. I rarely run into them anymore and when they do show up there not wired so I fig they broke and were forgotten about.

stihlman · Feb 9, 2015

As far as I know those Lincoln motor generator welders were all three phase. The large horizontal ones went up to 600 amp output. They were pure DC welding current with controls similar to the engine drives so you could fine tune the volt-amp characteristics

Sodo · Feb 9, 2015

It looks to me like the machine was in-use (for years) with that crows foot plug.

So,,,,, should I plug in in to a 220 dryer outlet and test it? Or was there a crows foot outlet that is 3phase (& no ground) in the old days? This thing has an "inventory date" of 5/71 written on it.

Shield Arc · Feb 9, 2015

I'd ask on Welding Web, there is a moderator there that goes by 7A749 he repairs welders for a living. He would know if these things came in a single phase version.

CNC Dan · Feb 9, 2015

See if one of the plug's prongs is connected to the case/frame. That would be the ground.

oldtimer 66 · Feb 9, 2015

generally used for air arcing now

Sodo · Feb 10, 2015

CNC Dan said:
See if one of the plug's prongs is connected to the case/frame. That would be the ground.

Easy test, ya that would do it!

Shield Arc · Feb 20, 2015

Sodo got some information on your welder on WeldingWeb. Post #59. 7A749 repairs welders for a living.
What is the Cadillac of stick welders?? - Page 3