[TheForge] TIG welding

Sun Jan 26 21:20:01 2003

The long post purge is to help cool the electrode and tip. on some units it 
is adjustable
L Brown

At 08:36 PM 1/26/2003 +0000, you wrote:
>I've got a Lincoln square wave 175 it is a great welder the only real
>complaint I have about it is there is no way to control the pre and post
>purge it uses alot of gas'
>post purge is about 10 seconds which seems a little long for some of the
>welding I do.
>----- Original Message -----
>From: "Howell Steve" <[email protected]>
>To: <[email protected]>
>Sent: Friday, January 24, 2003 10:22 PM
>Subject: RE: [TheForge] TIG welding
>
>
> > Hi Rich- welcome to the show.
> > I'm surprised how quiet the list is lately so I will step out on a limb
>and give people ammunition with which to shoot me down (smirk)~!
> > I know some folks are tig welding alum. with DC but for most applications
>you will need an AC machine with HF (high freq.) An AC capable machine is
>not cheap. The AC package for the little Miller Maxstar machine I have ups
>the price from $1600 to 2800$ That's alot to pay for the occasional aluminum
>session.  Air-cooled torches are cheaper but give less duty cycle. Heavy
>duty TIG units ( > ~200A) should have a water cooled torch and for that and
>the cooler you can add about $400. Get's spendy in a hurry.
> > Although it will cost $$, I can't say enough about the new inverter
>welders that are being made out there. My last stick/tig box weighed 650lbs
>and the new equivalent is near ~37lbs. The site work you can do with one of
>these will pay for itself. best of all they can run on anything from 110 1
>phase to 480 3 phase without doing a thing.
> > Oh yeah- the three best selling 'economy' models of TIG boxes:
> >
> > linclon square wave 175
> > Miller econo-tig
> > Miller syncrowave 180SD
> >
> > Would any owners of the above care to speak up about features, etc? I'm
>not sure if they are all DC machines.
> > hope that helps
> > Steve
> > Seattle
> > *********
> >
> >
> > Hi all,
> >
> > Just to briefly introduce myself - I'm a UK teacher, who does a bit of
>metalwork manufacturing and design in my spare time.
> >
> > I have a 250 amp MIG welder that uses Argoshield as a shield gas at the
>moment, and access to a gas welding setup as well. However, I can't help
>feeling that TIG welding might produce neater results and make for less
>grinding afterwards, as well as offering the option to weld aluminium as
>well.
> >
> > I don't really know much about it, though, and would appreciate some basic
>info on the subject. I've had a look around at some machines in catalogues,
>and one difference between the cheaper models is 'scratch starting' and 'HF
>starting'. Would this make a huge difference; is it worth the extra cash?
>Could I weld aluminium with the cheaper scratch start models?
> >
> > Any info would be appreciated,
> >
> > Rich.
> >
> >
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