Need help on 3G open root!

admin

Hey guys I'm in my second level of apprenticeship and we are doing open roots. So far I've been okay but I've had trouble with my 3G...I'm running 1/8 6010 at 80 amos(same as all other positions)....3/32 gap and land. I keep getting lack of pen/undercutting at edges of the root. I have 2 days to get this or else I can fail the level. Any help/pointers would be great. I can post a pic in the next post. Thanks guys
Reply:Originally Posted by LIVINtheLIFEHey guys I'm in my second level of apprenticeship and we are doing open roots. So far I've been okay but I've had trouble with my 3G...I'm running 1/8 6010 at 80 amos(same as all other positions)....3/32 gap and land. I keep getting lack of pen/undercutting at edges of the root. I have 2 days to get this or else I can fail the level. Any help/pointers would be great. I can post a pic in the next post. Thanks guys
Reply:Here is back side of root...it is 3G the picture is just sideways from the way it uploaded Attached Images
Reply:LIVINthLIF....you're really close.  Too bad you're short on time.  I find a telltale of how much buildup you're producing is the length of the brighter coloring immediately below where you're depositing metal.  I long arc a touch to preheat and then will drag slowly until about a quarter inch of reddish hue is following the deposit.  Then I'll speed up or start a small whip.  Compared to you, I'm usually around 70-75 amps.  I'm also usually on the heavy side with buildup.  What I'm trying to say is....are you watching this coloured area and maybe it can help you increase your buildup?
Reply:OldSparks I will try to get more build up... As it sits im normally flush it maybe 1/32 to 1/16of build up. My technique normally consists of a small whip forward that preheats/scoops metal out ahead of my keyhole then I dive back into the keyhole to fill. I'm thinking maybe my travel speed is too fast and im not depositing enough metal? I've tried turning it up(82-85amps) but my keyhole normally gets out of control and if I'm anywhere below 80 my arc normally snuffs out. I will get a little more time tomirro before my test im hoping I can figure it out
Reply:A slightly tighter arc length will help with the undercut.ChrisAuction Addict
Reply:slow down a tad.Grind the scale off the backside before you weld.