This is my first post to this group. I have moderate experience of welding steel with my arc welder and have just bought a SIP topmig 150 MIG to weld aluminium. All my efforts so far have resulted in little balls of aluminium flying off everywhere or the workpiece melting completely. I'm using 0.8mm alu wire and pure argon gas, I've tried loads of combinations of amperage and wire speed and gas pressure but I'm getting nowhere. I cannot get a bead of molten metal that actually fuses with the workpiece. Can anybody give me some advice? possibly a website with good instructions? any help seriously appreciated (I'm desperate!!!!). Many thanks Paul.
- posted
18 years ago