cell phone pics came out crappy, I didnt have time to find the digital cam this am.
I played with it last night and just cant figure it out. I tried 60 amps, 6 background, 50% peak, and 4pps, 20pps, 60pps, 100pps... nothing helped.
60 - 6 - 50% - 20pps gave me the best bead profile, good travel speeds to where I wasnt feeling rushed and I felt I wasnt putting alot of heat into the metal sitting there tinkering with making a pritty weld. but they still were grey. but the surface was smooth, not porus with lots of micro pits.
tired 60 amps 6 bg, 40% peak, 10pps, 20 pps... still grey, alot less heat and had to travel slower to flatten out the puddle. HAZ was about the same though.
lowered the peak time to 35 and 30% and couldnt even make a puddle flatten out.
I even tried the interesting 150amps, low background, 50% peak, 4pps suggestion and it still didnt solve the problem. but it was fun! it was like blasting spot welds, I could only dab ever 4th or so.
I took the pulse off and found that 30-40 amps would be the sweet spot to make a nice weld and run with it quick. still grey though.
Then I got to thinking, maybe its my filler rod. If I used the 150 amp pulse thing on across the tube, it left a shiney weld, but only if I moved it fast. If I used my 60 amp settings above it would make a grey weld.
Also for what its worth I notice the end of my filler rod is grey where it melts, yet shiney and a slight blue haz a mill or so up the end.
I think its just crappy base metal and crappy filler? I dont really know.