Which welder
in [Car Maintenance]
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From: Harry Bloomfield on 24 Jul 2010 14:57 on 23/07/2010, Fredxx supposed : > "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote in message > news:513b3f1ab8dave(a)davenoise.co.uk... >> 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? >> > > 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? -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
From: Harry Bloomfield on 24 Jul 2010 14:58 asahartz presented the following explanation : > On Fri, 23 Jul 2010 23:05:48 +0100, Tim Watts <tw(a)dionic.net> wrote: > > >> Despite what others have said, I got on fine with pure CO2 for welding >> everything mild steel from car panels to about 5mm (OK, vee'd out with >> grinder, several passes and not a critical application). > > Agreed, I use plain CO2 all the time, no problems. > >> >> Said mate had an auto-blackout mask - it was nice, but at the time (mid >> 90's) too expensive for me to buy one. > > Much cheaper now, mine was about �40 and worth every penny! Agreed, they are brilliant :-) -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
From: Harry Bloomfield on 24 Jul 2010 15:27 Ozie explained on 24/07/2010 : > 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. I managed to weld car structure and body panels quite well using just CO2. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk
From: Jim K on 24 Jul 2010 15:47 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-ca06-4e13-8e58-5fbd1a7367fa(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? > > > 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
From: Harry Bloomfield on 24 Jul 2010 15:51
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-ca06-4e13-8e58-5fbd1a7367fa(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? >>> 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? -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |