On 2008-01-03, Harold and Susan Vordos wrote:

"DoN. Nichols" wrote in message
...
snip----

I think that in *that* situation -- the welder is depending on the
current through the back loop to trigger the solenoid which brings the
ends of the blade into firm contact to make the weld. I've never
bothered to actually trace out the circuitry for the stand-alone blade
welder which I have, however.

My unit is pretty primitive. The motion that brings the blade ends together
is manual, a lever that is depressed. I'm mystified by this thing, DoN.

Interesting. Mine has a solenoid which unlatches the blade
holders to slide together -- or which draws them together. I would have
to clear the space to open it up again to verify which in this case.

Unplug the unit and press the button, and the holders stay
separated. (And yes, I think that they all are rather primitive -- but
if that does the job -- who cares? :-)

Enjoy,
DoN.

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