I'm having a trouble in arc welding process.
There's about 10 locations of weld in each part I produce (like the attachment pictures), but the arc sometimes fails, pulling to one or other side, instead of staying in the center of both pieces. This happens randomly, in various points.
I've already checked the repeatability with the dial and it's ok.
My jig is very firm and well fixed.
Everything seems to be ok, but the problem continues. I just don't know more what to do!
Robot: Fanuc ARC Mate 120iC - R30ia
Power Source: Lincoln Electric POWER WAVE i400
GMAW Process; Wire Ø1,0mm; Metal thickness 0,9mm.