From: Andy Dingley on
On 24 July, 14:46, Jim K <jk989...(a)googlemail.com> wrote:

> > CO2 can't be used for MIG,
>
> bollox!

What do you think the "I" in MIG stands for? If you're using CO2,
it's by definition not MIG and just MAGS (and so works rather
differently).
From: Jim K on
On 24 July, 16:03, Andy Dingley <ding...(a)codesmiths.com> wrote:
> On 24 July, 14:46, Jim K <jk989...(a)googlemail.com> wrote:
>
> > > CO2 can't be used for MIG,
>
> > bollox!
>
> What do you think the "I" in MIG stands for? If you're using CO2,
> it's by definition not MIG and just MAGS (and so works rather
> differently).

strewth... but you do agree you can weld steel together using CO2 as
gas in what's commonly known as a "MIG welding machine"??

http://www.mig-welding.co.uk/welding-gas.htm

Cheers
Jim K
From: Ozie on
Well following advice on the welding forum i bought a Clark Pro90 today
it came with a Co2 bottle and i bought an Argon/Co2 mix bottle.
I will practice with both of these before i decide which large size
bottle to buy as there is such a large difference in price.
On the way home i was passing the local fire station which was having an
open day, they were cutting the roof of an old Astra, so i managed to
get the roof and bonnet to take home for welding practice.
Thanks for everyone�s comments, although their still seems to be a Co2-
Argon/o2 divide
if anyones interested i will report back how the Novice managed.

--
Oz


From: Sla#s on
Cicero wrote:
> On Fri, 23 Jul 2010 13:12:13 +0100, Fredxx wrote:
<SNIP>
>... you might just as well use oxy-acetylene, though
>> I suspect it's not allowed in a domestic environment.
>
==============================================================================
>
> I don't think there are any restrictions on home use of oxy-acetylene.
> BOC Portapak (with outright sale of bottles) has been available since
> early 1970s. I bought mine about 1974 and learned to weld with it. I
> also upgraded to larger bottles without any restrictions except that
> they were rented rather than bought.
>
> It's actually more versatile than other welding methods for many
> purposes since it can be used to form and shape metals as you go
> after initial tacking.
>

I agree - that's exactly what I did and used the kit at home for many years
without any problems. I always used my home address when getting new
cylinders and BOC never queried it.
I re-silled and A-panelled a Mini with it - including using lead filler - a
great learning experience :-)

However the main problem could be your home insurance - welding cylinders
within a certain distance will invalidate it! If your garage is attached
don't risk it but if it is at the other end of your garden check the
distance.

Slatts


From: asahartz on
On Fri, 23 Jul 2010 23:53:01 +0100, "Dave Plowman (News)"
<dave(a)davenoise.co.uk> wrote:

>In article <8au5i1FnpdU1(a)mid.individual.net>,
> newshound <newshound(a)fairadsl.co.uk> wrote:
>> I liked the look of his mini portapak; didn't feel I could justify the
>> cost of gas welding kit until I saw that. Obviously it would get a bit
>> expensive for significant car welding.
>
>Thought gas welding wasn't as suitable for car stuff (thin) due to
>distortion? Mig keeps the heat more localised?

A skilled gas welder can weld car bodies. I saw a resto on a Jag once
where this had been done; they said too that the weld bead is not as
hard as with MIG so it could be planished flat with a hammer rather than
doing so much grinding.

The old workshop manuals recommend placing wet asbestos around the weld
to contain the heat!
--
asahartz woz ere