Nice to find this group.
I am trying to get good at butt welding 1/4 steel plate before starting on a steel sailboat.
Here is where I am now: http://www.youtube.com/watch?v=NZXesmcNEJ0
I know I am too aggressive on the length and size of welds on the back side, after the front side is tacked, but I'm sure there is lots of other tuning I can do too, so suggestions are welcomed.
The video covers most of it, but I'm using flux core, 1/16" wire @ 250amps and 245 ipm welding flat down. I think I'll go back to a square butt tonight to save time over double beveling and up the amps to 275 and maybe the wire speed too in order to get the weld to flatten out more and to get the filler material in with less heat into the plate.