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  • From: bobf <bobford79 AT yahoo.com>
  • To: Don Bowen <don.bowen AT earthlink.net>, homestead AT lists.ibiblio.org
  • Subject: Re: [Homestead] DIY home-made welders
  • Date: Sun, 22 Feb 2009 10:59:02 -0800 (PST)

Thanks Don; another one of those 'don't believe everything you read on the
internet'. It looked intereting to me, but I am someone who was talked into
putting his wet finger in a light socket when I was about five.......

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--- On Sun, 2/22/09, Don Bowen <don.bowen AT earthlink.net> wrote:

> From: Don Bowen <don.bowen AT earthlink.net>
> Subject: RE: [Homestead] DIY home-made welders
> To: bobford79 AT yahoo.com, homestead AT lists.ibiblio.org
> Date: Sunday, February 22, 2009, 11:55 AM
> Several problems with this welder. For one thing he mostly
> skips over
> phasing of the teo transformers. Unless you hook both up
> with the correct
> phase and wind both in the same direction you will have
> phasing problems
> which as a minimum will not get you any output and as a
> maximum will have
> sparks where you do not want them.
>
> Another is the 10 ga wire. You need solid insulated wire
> and the thinner
> the insulation the better.
>
> The coils are not isolated from each other so you could
> potentially have not
> 20V on the holder but 220. There needs to be a ground
> otherwise you could
> be the ground.
>
> The use of a vice grip for a holder is something you only
> do when you just
> run over your good holder with a forklift. That puts you
> in the circuit.
> How can you guarantee that there is not a piece of metal
> piercing your
> welding glove? A vice grip does make a very good ground
> clamp.
>
> As a starting point you set the Amps based on the decimal
> size of your rod
> then adjust up or down from that as needed. A 1/8 rod is
> .125 inch so the
> starting current is 125 amps. I like to start under that
> do I would start
> with 80-90.
>
> The leads are way too short and small. Cheap jumper cables
> are way too
> small. You waste much of your energy heating up cables.
>
> I would spend the money on Craig's list or (shudder)
> Harbor freight which is
> where he gets his tools.
>
> Don Bowen KI6DIU
> http://www.braingarage.com/Dons/Travels/journal/Journal.html







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