Recaping= doing it over and over.  Stacking iron= stacking beads on top of each other.  Doing it in 3's= 3 pass weld.  What kind of joint are you trying to run here brotha?  It says your a pipeliner so I'm assuming your talking about an open butt v-groove.  Am I right?  We need a bit more info on what kind of trouble you are having with stacking iron.

'Stacking iron' is basically the height of your cap. Most inspectors out here want your cap to be 'a nickel high and dime wide' as in reference to the size of the weld. With this diesel machine it creates such a strong arc force that even if i have my heat turned down as low as possible my puddle can't cool quick enough to freeze to the pipe. Thus pulling the puddle down the pipe with my rod(not letting it stack iron). It basically leaves a concave weld especially in the middle where it's hottest. Let me tell you it can be extremely frustrating especially when i've tried every weave i know and asked for the opinion of other welders, all to no avail. The best advice I've gotten is to speed up and even though that helps, it's still usually not high enough after just one pass. After the cap is done, if it's not tall enough i'll have to go back over it with a 5/32 to try and let it stack up more. Sorry about the confusion and I hope this helps.