On Mon, 12 Apr 2010 20:59:30 -0700, "Steve B"
wrote:


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

Spot welding like that takes well north of 1000 amps. Several guys have
made spot welders out of microwave oven
transformers. I haven't done that so I'll defer to someone who has.

I would be one of those who have:
http://www.metalworking.com/dropbox/...rPrintable.pdf

'Cause I just had to know if it would do Steve's job, I tested it. I used
3/16 rod, because I think 1/4 is just too big for spice racks and that
sort of stuff:
http://home.comcast.net/~bobengelhardt/SmRodWeld.jpg

It took 3 or 4 tries to get the timing right ('bout 3 seconds, I'd say).
The joint shown held while the rod bent.

As described in the DropBox writeup, my welder draws 17A at 240v, or 4kVA.
2000A output if one divides the 4kVA by the 2v OCV.

Iggy's 5kVA, $70, welder was a great deal, but it's gone. And it takes
floor space - a serious limitation for some of us G.

Bob

I think I'll just hot spot weld 3/16" square. I need a couple of spice
racks and shelves until such time as we win the lottery and remodel the
kitchen.

Steve

So I cant use my 300 amp square wave tig?

Damnit...sigh


Gunner


"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.

This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost