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Nov 22, 2015 15:58:02 GMT
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Nov 22, 2015 15:59:29 GMT
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I'm on my lowest setting and had my wire speed at 4, I tried to crank it up to 7 but it did the same thing ?? Do I need to go lower ?
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Nov 22, 2015 16:13:38 GMT
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You pic of the panel doesn't show enough detail, but if it's a heavily stretched area when pressed the material will be thinner, and likely to blow through more, Try lower wire speed and just do overlapping tacks until all joined up, this minimises heat input and distortion. What wire thickness is it? I was told 0.6mm is easier to melt therfore increases the chance of blowing through when compared to 0.8mm. This being harder to melt consumes more of the welding ampage and less goes into the panel.
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Nov 22, 2015 16:46:43 GMT
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It's not too thin there, probably 1mm thick because I cut it back quite far to get thick metal, the patch I've used is probably a bit thinner and I'm on 0.8mm wire, there's a smaller patch so I think I'll do that so that I can keep cutting it back if I mess up again. Just annoyed, I thought I was ready but obviously not? ![???](//storage.proboards.com/forum/images/smiley/huh.png)
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93fxdl
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Nov 22, 2015 17:06:10 GMT
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Have you run out of gas? Don't try and run a continuous bead, just keep doing tacks till they all join up. Ttfn Glenn
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Nov 22, 2015 17:30:39 GMT
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yes gas looks low is it co2 or a argon mix, better.
try welding from a position where the torch is practically lying down.
Weld off your previous weld beads, welding backwards instead of forwards, and weld on off, on off, on off watching the weld pool cool down through the mask before going back on.Only do a couple of cm at a time. In this way you can weld with quite a high current and with good penetration.
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jgtr
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Nov 22, 2015 17:59:10 GMT
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Nov 22, 2015 18:58:35 GMT
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It's just a co2 bottle, I think the gas is fine ? I can hear it coming out when I pull the trigger? I can't even do a cm at a time, it blows through pretty much as soon as I pull the trigger. Would a bad earth cause it ? I cleared a section of metal down to metal that you should see in the pic ?
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taurus
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Nov 22, 2015 19:23:11 GMT
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I'm no expert with a mig but I find that a lower amp setting helps prevent me blowing too many holes. I also took the advice to weld in very short bursts and that makes a difference.
On thin metal (old Japanese cars!) I start with low ampos and wire feed and work up slowly until it's just enough to sizzle. A good earth and clean metal are also essential to making life easier.
Are you working outdoors? If so you need to shield the work from any wind.
Straight co2 isn't ideal of course, but it's all I've got and it can work well enough for a structural repair that isn't cosmetically perfect.
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Last Edit: Nov 22, 2015 19:24:51 GMT by taurus
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Welding helpDeleted
@Deleted
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Nov 22, 2015 19:55:50 GMT
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I have that welder, setting on low and the wire speed turned right down most of the time. are you using a regulator with the gas?
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Nov 22, 2015 20:33:56 GMT
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As said above , you need to weld of of your weld if that makes sense , ie. the lumo of weld you have on there is thicker than the parent material and takes some of the heat out , meaning you don not blow through . A slow process but the only way [ slowly to avoid heat distortion , and blowing through ]
Best of luck .
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Nov 22, 2015 22:11:33 GMT
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What's a regulator look like ? I have dial with a needle that pings round when I open the gas and it's set to nearly full. Skylinedave I think I get you, get a blob of weld on there and use that as a start point
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Nov 22, 2015 22:39:39 GMT
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Put up a pic of your reg dial mate, if it's set to nearly full you're using too much gas too. Leave your switch settings where they are, turn your wire speed down to around 2.5 or the amps will be too high and you'll keep blowing through. Those hobby type welders take a bit of mastering as they don't really go low enough on the amp setting, but with it set up right you'll get decent weld penetration. Whereabouts are you?
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'96 Volvo 850T5 x2, '97 Alfa 145 Cloverleaf '96 Alfa 155, '91 XR2i 2.0 Zetec (sold), '88 BMW 520i slug (sold), '81 Escort Mk3 Project, '68 Mk1 Escort Estate, Berlingo Parts Chaser.
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Nov 23, 2015 12:04:03 GMT
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cheers people, i'll get a pic up of the regulator dial later - and try and have a bash again at some point, i might try building a welding trolley up first though - I'd forgot how heavy and awkward everything is to shift around !!
also what are people doing after they've welded ? seam sealer, high build primer and then top coat ? or do i need to do some kind of hammerite type thing in there ?
I'm assuming underneath i need seam sealer, primer and then some kind of stone chip ? someone said shultz spray or shutz spray ?
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![](http://images.tapatalk-cdn.com/15/11/24/e45fffa6567c7999b6824b263a86988d.jpg) This is my gas setting ? Too high ?
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Nov 24, 2015 11:43:18 GMT
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Ideally when you're mig weldin your flow rate should be 12-14lpm
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Nov 24, 2015 14:39:53 GMT
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I thought it should be about 12 but my dial only goes round to six that's why I had it cranked up, unless I'm reading the dial wrong ??
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Nov 24, 2015 16:38:54 GMT
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Last Edit: Nov 24, 2015 16:40:14 GMT by colnerov
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Nov 24, 2015 16:52:02 GMT
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you,ve a tough job with a DIY welder.......make sure the torch and lance are in a straight line from the welder to your work piece,this should help the wire feed....turn your gas off on the regulator then press the trigger and slowly turn the regulator up until you here the gas coming out at a reasonable rate...(undo the wire rollers to save mig wire)..whats the power supply like??..if your running the welder through a normal extension lead it will struggle to get the amps...is there any sign of rust on the wire spool? if so your liner will be knackered....I'm using a 250 lincoln welder on .8 wire with 40 mete 2.5mm cable...i struggle to burn 0.8 wire on number 7 power setting it goes upto 8.....
edited to say...............youve cut the rust out correctly and the new piece looks great BUT make the plate your putting back in slightly bigger than the hole youve cut out..much much easier weld......
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Last Edit: Nov 24, 2015 16:56:02 GMT by woz1972
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sparkyt
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Nov 24, 2015 22:45:33 GMT
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Put some ali behind the weld tight against the back this will stop blow through and when your don't it won't stick as it's a dissimilar metal
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