From: NT on 23 Jul 2010 04:38 On Jul 22, 10:58 pm, Mark <M...(a)127.0.0.1> wrote: > If you have never used one before you need to practise and get your > technique perfected before you even think of starting on the VW. > unlike this chap http://i31.tinypic.com/vq4hns.jpg lol
From: Dave Plowman (News) on 23 Jul 2010 04:43 In article <i2bjsq$p9e$1(a)news.eternal-september.org>, Fredxx <fredxx(a)spam.com> wrote: > "Andy Dingley" <dingbat(a)codesmiths.com> wrote in message > news:de442991-ca06-4e13-8e58-5fbd1a7367fa(a)d37g2000yqm.googlegroups.com... > > On 22 July, 20:43, "steve robinson" <st...(a)colevalleyinteriors.co.uk> > > wrote: > > > >> Its not that easy to use on car bodywork though as it tends to cut > >> through . > > > > Are you using the right welder polarity? > I've read an number of articles which suggest it doesn't make much > difference and that its more the current/voltage characteristics which > are more important. > My MIG is wired for gas, and my understanding the ideal polarity is the > reverse for gasless wire, yet I can make satisfactory welds. If you > have an alternative experience I would like to hear them. That's interesting - I have a SIP Migmate for gas only, and would like the option of gasless. Do you need any other parts other than the wire? -- *Time flies like an arrow. Fruit flies like a banana.* Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: Jim K on 23 Jul 2010 04:55 On 23 July, 09:43, "Dave Plowman (News)" <d...(a)davenoise.co.uk> wrote: > In article <i2bjsq$p9...(a)news.eternal-september.org>, > Fredxx <fre...(a)spam.com> wrote: > > > "Andy Dingley" <ding...(a)codesmiths.com> wrote in message > >news:de442991-ca06-4e13-8e58-5fbd1a7367fa(a)d37g2000yqm.googlegroups.com... > > > On 22 July, 20:43, "steve robinson" <st...(a)colevalleyinteriors.co.uk> > > > wrote: > > > >> Its not that easy to use on car bodywork though as it tends to cut > > >> through . > > > > Are you using the right welder polarity? > > I've read an number of articles which suggest it doesn't make much > > difference and that its more the current/voltage characteristics which > > are more important. > > My MIG is wired for gas, and my understanding the ideal polarity is the > > reverse for gasless wire, yet I can make satisfactory welds. If you > > have an alternative experience I would like to hear them. > > That's interesting - I have a SIP Migmate for gas only, and would like the > option of gasless. Do you need any other parts other than the wire? no - tho all "either way" machines have easy access to reverse polarity of torch/earth - tho seems some don't bother.... cheers Jim K
From: Andy Dingley on 23 Jul 2010 05:26 On 23 July, 09:22, "Fredxx" <fre...(a)spam.com> wrote: > My MIG is wired for gas, and my understanding the ideal polarity is the > reverse for gasless wire, yet I can make satisfactory welds. Yes, reversing the polarity is ideal. If you don't do this, you'll burn the base metal, just as reported here. Some cheap gas/gasless welders run permanently with gasless polarity (wire hotter than base), so they would suffer from poor penetration if used for thick metals, which admittedly they're unlikely to be used on.
From: Andy Dingley on 23 Jul 2010 05:28
On 22 July, 23:54, Pete M <pete.mur...(a)SPAMFREEblueyonder.co.uk> wrote: > You can get a secondhand TIG welder for about £350. They rock! Slow though. I can't imagine why I'd use TIG on car bodywork, when I could use oxy-acetylene instead. Both have just the same problem of being a slow, high-skill process to handle the torch and filler. |