My mig learning curve

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Spent some time today with the new HH190 and this is the result. Overall I'm pretty new to this process  but already I'm starting to kick myself for not getting this machine sooner.Setup is tap 6 (appx 27 1/2 v) @ appx 400 ipm (55 on dial) C25 gas .0301/4 " welded to 5/16 .I didn't spend enough time burning into my tacks on the ends Sent from my SCH-I605 using Tapatalk Attached ImagesLast edited by bandaidmd; 03-18-2014 at 04:51 PM.
Reply:I have the same machine and have been practicing on similar size material. What I did next was to lay two more beads: the second pointed at the toe of the first weld, aiming mostly at the bottom plate, with a roughly 50% overlap. The third pointed at the top toe of the second weld, and tying in to the top edge of the upper plate.Miller Multimatic 255
Reply:You might try pre heating the metal first, you are welding the max thickness with that welder and if your not an experience welder you might no be getting good penetration and a strong weld.
Reply:Originally Posted by kctgbYou might try pre heating the metal first, you are welding the max thickness with that welder and if your not an experience welder you might no be getting good penetration and a strong weld.
Reply:I thought about that afterwards that I should have put it on 7.This was not a critical part so I wasn't too worried about max penetration but now that I think about it why practice at the wrong settings.  The old saying about practice makes perfect is wrong, only perfect practice makes perfect.Thanks for the advice guys.Sent from my SCH-I605 using Tapatalk
Reply:what do you use to etch a weld slice? I cut a weld in half to check the penetration and cant see the difference in the base and the weld, its some sort of acid?  Will anything  that I may likely have already on hand work such as toilet bowl cleaner???I already know that i didn't have very good penetration on a 5/16 to 5/16 lap joint by the piece i chiseled apart. I will post some pictures for critique later.