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hi just been paractising MIG welding with a mighty mig 130.

the weld is really weak , i can pull the two bits of metal apart with my hands.

why is this , is it just not a very strong welder or am i missing something ?

im confused as i thought it would be stronger than this ?

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sorry guys just realised that the little screw that press's against the wire when its being fed through hadnt been done up! it seems to be fine now but spluttering, it is stronger though.

practise was on an old pair of metal cutters , very poor i know !

1302543124_12192_FT432049_img_8129_.jpg

1302543124_12192_FT432049_img_8132_.jpg

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what's the gas like? It can splatter a lot and become very weak when the gas is running low.

I've done it before when I've tried to weld something and forgot to turn the gas on :D gives a very rough looking weld that looks messy, also sometimes almost looks hollow if you get what I mean, instead of a smooth pool. Also seem to get a black coloured weld instead of a nice silver pool.

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I'd say so yes. We have a Mig 180 (i think its 180) at work, and anything over setting 3 blows holes in stuff super easy. So I'd say a 150 on a higher setting will do just fine. I have a portable 90 at home too and I used that to weld my 3inch turbo downpipe, and the penetration on that was perfect.

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to be honest, It'd be easier to rip the interior out anyway and probably cut it slowly from underneath.. just make sure no wires are there obviously first.

Then really take your time making the metal patch fit as best and as flush as you possible can to the floorpan. It'll make it so much more easy to weld.

Just go slow with it is all I can say, hard to say sometimes as 2 patches never seem to be the same, always have to do something differently. Oh and get somebody on fire watch ;) amazing how quick under carpet stuff can catch, and the paint that's on the floor.

As for welder, I meant to say a 130 will do just fine on a higher power :D so I wouldn't worry about the 150. Doubt you'd have it up that high to notice the difference. On some floors, our welder at work is normally on setting 2 out of 10, sometimes 1 if it's really thin.

Why don't you see if you can get a picture of the hole from underneath, then maybe somebody can use MS Paint and draw where you might want to cut?

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