- Thread starter burnit
- Start date
malcolm
& Clementine the Cat
- Messages
- 9,679
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- Bedford UK
Welcome burnit. Finding this site could have been the miracle (perhaps we should all use divine intervention (or at least Yahoo rather than Google)). 
WHat are you working on? Have you hit a snag?
Surely someone should get to be a saint?
WHat are you working on? Have you hit a snag?
Surely someone should get to be a saint?
Highway_Star
Member
- Messages
- 299
Welcome.
I've learned loads from the photos, articles and forum on this site, if my experience is anything to go by, you've found your miracle!
I've learned loads from the photos, articles and forum on this site, if my experience is anything to go by, you've found your miracle!
Highway_Star
Member
- Messages
- 299
'Fraid not, it's not something I've ever tried to do.
malcolm
& Clementine the Cat
- Messages
- 9,679
- Location
- Bedford UK
3-4mm sounds very thick. Is it a Land Rover?
The maximum setting of the 90 amp MIG probably isn't enough to get enough heat up to lay a decent weld on 4mm. If you have any scrap to experiment with try the maximum power setting and increasing the wire speed to suit (will have to be quite high).
Then weld onto the chassis beside but not touching the 1mm plate, and if you get enough power to make a weld pool quickly dip across to the plate then back to the chassis. Keep on going until you have a weld. The torch will spend maybe 80% of it's time over the chassis rather than the 1mm plate, otherwise you might melt the end of the plate.
Penetration will be poor in the 4mm sheet, so the weld might not be very strong. I'd normally use maybe 130 amps for that sort of job.
The maximum setting of the 90 amp MIG probably isn't enough to get enough heat up to lay a decent weld on 4mm. If you have any scrap to experiment with try the maximum power setting and increasing the wire speed to suit (will have to be quite high).
Then weld onto the chassis beside but not touching the 1mm plate, and if you get enough power to make a weld pool quickly dip across to the plate then back to the chassis. Keep on going until you have a weld. The torch will spend maybe 80% of it's time over the chassis rather than the 1mm plate, otherwise you might melt the end of the plate.
Penetration will be poor in the 4mm sheet, so the weld might not be very strong. I'd normally use maybe 130 amps for that sort of job.
