Munkul
Jack of some trades, Master of none
- Messages
- 7,370
- Location
- Cumbria
It's too hard a question to answer. You need to know what you want your end result to be.Thanks Munkul, I understand that. So would the one pass suffice, or would it be best to run multiple passes to be sure? If it's multiple passes, would they all be made with the mig running at full power?
(Sorry to hijack the thread, but trying to understand this myself!)
Take a fillet weld in the flat position.
Like Hitch says, a single pass at 250 amps will be a "good" weld that will hold whatever it needs to hold, but the leg length might only be 6mm (for example). Will be fine for a lot of applications where that size of weld is strong enough, but in other cases it might not be. In which case you'd probably run another two passes (top and bottom). Each pass should be in spray transfer to ensure proper penetration and no LOF, so you'd probably have to run those extra two passes at 200-250 amps as well. In which case you might end up with a 10-12mm weld leg length. (for example)
So in this case you only really have two choices - 6mm or 10mm weld, for the sake of argument.
Now in reality you can play tunes with travel speed to give 3 slightly larger or slightly smaller runs, so it's not a clear-cut right-or-wrong answer. It's just whatever works to give you the best quality weld for the size and application.