Which welder
in [Car Maintenance]
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From: Harry Bloomfield on 25 Jul 2010 05:37 It happens that Harry Bloomfield formulated : > Fredxx formulated on Friday : >> I could only get gasless wire at 0.8mm, whereas with gas I only ever used >> 0.6mm. I felt the feed rate ended up being nearly the same. There is a >> lot more spatter than using gas. > > I suppose that is just a matter of swapping the tip over to 0.8mm? Oh, no it isn't - it is a 0.8mm tip already. I feel a gassless weld coming on :-) -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
From: Jim K on 25 Jul 2010 05:48 On 25 July, 10:37, Harry Bloomfield <harry.m1...(a)NOSPAM.tiscali.co.uk> wrote: > It happens that Harry Bloomfield formulated : > > > Fredxx formulated on Friday : > >> I could only get gasless wire at 0.8mm, whereas with gas I only ever used > >> 0.6mm. I felt the feed rate ended up being nearly the same. There is a > >> lot more spatter than using gas. > > > I suppose that is just a matter of swapping the tip over to 0.8mm? > > Oh, no it isn't - it is a 0.8mm tip already. I feel a gassless weld > coming on :-) > machinewart want over a tenner for 0.9mm stuff http://cgi.ebay.co.uk/130402601378 0.8mm & £7.70 posted 2nd class Enjoy! Cheers Jim K
From: Rob Graham on 25 Jul 2010 06:19 On 25/07/2010 09:11, Harry Bloomfield wrote: > Rob laid this down on his screen : >> You still have to have a MIG that will run the gasless wire. The >> results are not so good but still work. Some welders have the option >> gas/gasless. > > It was bought as a gas Mig welder, to do one single job I needed done at > the time. I then used it few more times on other jobs, before loosing > patience with the silly little expensive gas canisters. Apart from the > gas problems it worked quite well, but because of the gas got shoved in > a corner and forgotten. > > So would I likely be able to buy a reel of gasless wire and use that? > > > I just converted my fixings to accept CO2 cylinders (pub ones to start with but now fire extinguishers.) No problems and far, far cheaper. Rob Graham
From: Dave Plowman (News) on 25 Jul 2010 07:11 In article <p66m46ttiq4mlvgpuh7pltjevajmkcpk8q(a)4ax.com>, asahartz <asahartz(a)hotMEATPIEmail.com> wrote: > >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. Jags had lots of lead loading. > The old workshop manuals recommend placing wet asbestos around the weld > to contain the heat! Oh indeed. But that was before MIG arrived, or was cost effective. -- *Honk if you love peace and quiet* Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: Rob on 25 Jul 2010 07:47
On 25/07/2010 6:13 PM, Jim K wrote: > On 25 July, 09:00, Rob<mesam...(a)gmail.com> wrote: >> On 25/07/2010 6:37 AM, Harry Bloomfield wrote: >> >> >> >>> Cicero formulated the question : >>>> On Sat, 24 Jul 2010 20:51:00 +0100, Harry Bloomfield wrote: >> >>>>> Jim K brought next idea : >>>>>> On 24 July, 19:57, Harry Bloomfield<harry.m1...(a)NOSPAM.tiscali.co.uk> >>>>>> wrote: >>>>>>> on 23/07/2010, Fredxx supposed : >> >>>>>>>> "Dave Plowman (News)"<d...(a)davenoise.co.uk> wrote in message >>>>>>>> news:513b3f1ab8dave(a)davenoise.co.uk... >>>>>>>>> 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- >>>>>>>>>> ca06-4e13-8e58-5fbd1a736...(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? >>>>>>>> I could only get gasless wire at 0.8mm, whereas with gas I only ever >>>>>>>> used 0.6mm. I felt the feed rate ended up being nearly the same. >>>>>>>> There is a lot more spatter than using gas. I have bought gasless >>>>>>>> wire of eBay and found it ok. I think machine >>>>>>>> mart do smaller reels which perhaps you can try out. If I was using >>>>>>>> reels of wire I would go for gas in hired bottles, but as I use a >>>>>>>> reel every year or 2, gasless is the cheaper option. >> >>>>>>> That is interesting, I have a mig which is designed for gas and the >>>>>>> reason I don't make much use of it is the gas. Gasless would be handy >>>>>>> if it would be able to use it - how do the gasless ones make contact >>>>>>> with the wire though the coating? >> >>>>>> what coating? :>) >> >>>>>> Jim K >> >>>>> I assumed the gas was produced from some sort of coating on the wire, >>>>> which I further assumed would not be conductive. Have I misunderstood >>>>> how it works, I have never seen any? >> >>>> ============================================================================== >> >>>> It's flux *cored* like electrical solder. >> >>>> Cic. >> >>> Thanks. Next time I see some, I buy it and see how it goes. >> >>> I had thought of the 'flux core', but discounted it as impossible to >>> produce with steel. >> >> You still have to have a MIG that will run the gasless wire. > > <snip> > > AIUI as long as you can change the polarity of the torch/earth any MIG > welder can run gasless (flux cored) wire? > > Cheers > Jim K Some have that facility to switch over. I have always only used gas and not familiar with gasless machines only know they are available. Is it only a polarity thing? I would also be considering if there is enough guts (amps) to the required wire thickness. |