"Bob Engelhardt" wrote in message
...
Don Foreman wrote:

Yes, you can put rectifiers on a stick welder to make it DC for either
stick or TIG. I've done it. The usual problem is that with a bridge
rectifier, neither stinger (or torch) nor groundclamp are really "ground"
so the work can't be grounded. ...

Why can't the work be grounded? Neither side of the welder secondary is
grounded and the whole secondary circuit is floating.

Then you could. The secondary was grounded on the buzzbox I did this with.
You are exactly right: float everything and then ground what you want
grounded for the job at hand.