Yes your so right, originally when I was doing it the weld would run away with itself, so when I did the halfway stop I would let it cool down . The actual test piece is two prices 50 mm (2 inch) x 200mm (8 inch) long so should be a breeze
Looking forward to trying it out tomorrow

Cheers guys I will give that ago tomorrow . I wish I came across those specs earlier as I've been going crazy trying to achieve the weld. I though something must be wrong that's why I did hours of searching to find the specs, they weren't easy to find I can ell you . I will let you know how I get on...

I've found this as the specs for the test peice 3 Multiple-run welds are permissible 4 There is a requirement for stop/restart positions to be included and identified 5 Where BUTT WELDS are required the following options are available square butt welded from one side single vee-butt welded from one ...

Ok I give up, I don't normally but this has got me beat. I have now used 24 metres about 70 ft of 3 mm x 20 mm of mild steel (over 100 attempts) and I'm still not any closer. I either get I nice 5 mm bead and no full penetration or full penetration but a concave bead or full penetration and a saggin...

Thanks for that, that's a real help. Just so you know I'm 49 years old and have dabbled in Tig on and off . It's just recently I decided to take the plunge and buy a decent ac/dc machine. I want to do it justice by producing neat and tidy welds constantly. That's why I enrolled on a Tig course at co...

Please excuse my ignorance but what do you mean by 'land'. Yes the weld has to be done in one pass. Just got some bad news from the college today, my course won't be starting in Jan . There not sure when but they will be in touch. Looks like the tutors op was more serious then he thought. I can't se...

Thanks for that sorry for the delay didn't notice it had gone on to 2 pages. I know it might be a pain but any chance you could take me through step by step how you would tackle it including filler size, amperage , electrode size, root gap ( if at all ) , bevel ( I'm doing a 45 deg full depth) If it...

I've tried bevelling to full depth and increased the amps which seems to vastly improve things, I'm trying to get the bead as neat and narrow as I can. If I could achieve 4mm then I would be pleased but am I expecting too much

Wow thanks guys for all the help your giving me. Right, to clarify a few points . I've enrolled on a city and guilds level 2 course here in the UK the course starts at the end of January next year. The welds that will be examined are lap joint, fillet joint , corner joint, round tube to flat plate a...

I thought the frequency adjustment was only for AC use. I'm using DC obviously for mild steel. Please correct me if I'm wrong. Otherwise that's something new I've learned

Can anyone give me good advice on doing a full penetration butt weld with a stop half way on 6 inch long 1/8th inch thick mild steel. It's for my City & Guilds qualification. I'm currently using copper backing bar, 2,4 mm electrode ground to a long taper point, 100 amps foot peddle control. I ca...