Re: Lincoln v205 or Miller Dynasty 200DX?

In article <[EMAIL PROTECTED]>,
Richard Smith <[EMAIL PROTECTED]> wrote:

> Harry Culshaw wrote:
> > Ernie,
> > I have taught welding for over 40 years and I have not heard the term
> > "crozzle" either.
> > I do think he is referring to the American term " Stack of dimes"
> > 
> > Harry
> 
> Hi - Richard Smith calling back.  Sorry about that description without 
> reference to convential terminology.  In Britain you would use the term 
> "crozzle" for really badly burned stuff around the rim of a pie-dish, or 
>   pork-rind heated 'til it is crunchy and just about going black.
> 
> Thing is, not now but when I first tried welding stainless, I used to 
> move the torch far too slow, wave it around and not get good shielding 
> and so on, so that I got horrible black oxides on my welds.  These days, 
> you can see metal shining through after hardly a rub with a brush.
> 
> I'm now trying to master back-purge, by-the-way.  Haven't had anyone 
> trying to qualify on stainless for some time at the college I go to, I 
> gather.  Hope to borrow a friend's Dremel tool and make lots of little 
> holes along one side of a copper tube, which I can but into the 
> corner-channel in my home-made 90degree outside-corner joint 
> back-purging assembly (in sheet metal).  Then will need to make the 
> sheet-metal "thing" for butt-welds.
> 

You should add a diffuser to your design.
Stainless steel wool behind some thin screen materiel will help
disperse the gas better.