Arc ending problems

IsakLeon

I'm new to robotizing and I need some help, I have an irb 1600 and a Fronius cmt welding machine.

The problem is that in every weld I make I always get an ugly ending at the arc. As the whole arc looks pretty good but at the end it is lower compared to the rest of the arc, and I've tried to change the % in final current but then I get a drop (too much arc) at the end of the arc.  It doesn't matter what type of position the robot is welding, it always ends up different then the rest of the arc.

So my question is what can I do to get the ending as perfect as possible? do I use final current, slope? or should I change something else? I've been looking for some information for hours so I hope I get some answers here.

If it helps I can put in a picture of the arc so just let me know.

Sorry for the bad english, and I would appreciate a simple english in the answer, thank you.