Mig welding: Bubbles? holes?

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I'll start off by saying, i KNOW i was going to slow (i was playing to see what would happen), but i'm curious as to why this happens.I am a new guy, please don't be to harsh.Welding Equipment so far:First Welder: Blue Hawk Flux-MIG 100 (no tanks, so only Flux for me right now)Second Welder: Miller MillerMatic 211 Auto-Set with MVP
Reply:is this with gas, and not flux core? Best guess is not enough gas coverage, probably caused be excessive wire stickout. Stick out is the distance you hold the nozzle from the work. Excessive stickout also lowers the energy going into the welds. That bead looks cold and "ropey", which further leads me to think you had too much stickout.You also need cleaner metal than that for MIG. You really should get some of that rust off.Miller Multimatic 255
Reply:With gas, not flux core.Thanks for the note, i'll watch what for that a little more.I am a new guy, please don't be to harsh.Welding Equipment so far:First Welder: Blue Hawk Flux-MIG 100 (no tanks, so only Flux for me right now)Second Welder: Miller MillerMatic 211 Auto-Set with MVP
Reply:are you welding outside or with a fan blowing?   if its windy it will blow your shielding gas away,  make a wind block in that case.  contaminants on the surface will sometimes do that too  25 CFH is a good flow rate to start at.  make sure you set it with trigger pulled as it usually drops a few CFH from the static stateTiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Are you using 100% C02 or C25?Is the MIG gun inserted into the machine fully? It will leak gas around the feed motor if not. Is the polarity correct for gas?
Reply:Is your nozzle filled with spatter?Just a couple welders, big hammers, grinders, and torches.Work will free you.Men in dirty jeans built this country, while men in clean suits have destroyed it. Trump/Carson 2016-2024
Reply:in a work room, the door/window was open with a little breese but i also only had the gas at 15 CFHI am a new guy, please don't be to harsh.Welding Equipment so far:First Welder: Blue Hawk Flux-MIG 100 (no tanks, so only Flux for me right now)Second Welder: Miller MillerMatic 211 Auto-Set with MVP
Reply:Originally Posted by AKweldshopIs your nozzle filled with spatter?
Reply:Originally Posted by Labmaster02Are you using 100% C02 or C25?Is the MIG gun inserted into the machine fully? It will leak gas around the feed motor if not. Is the polarity correct for gas?
Reply:Turn up the heat. Most likely poor gas coverage or tried welding over some debris. I usually run higher flow rates of gas usually 20-25 cfh. I weld on steel like that quite frequently make sure you push the bead.Millermatic 252millermatic 175miller 300 Thunderboltlincoln ranger 250smith torcheslots of bfh'sIf it dont fit get a bigger hammer
Reply:Originally Posted by farmshopTurn up the heat. Most likely poor gas coverage or tried welding over some debris. I usually run higher flow rates of gas usually 20-25 cfh. I weld on steel like that quite frequently make sure you push the bead.
Reply:Figured it out, it was the Gas!... seems i left it off with that last pass (that's what happens when kids interrupt welding)Thanks for the tips everyoneI am a new guy, please don't be to harsh.Welding Equipment so far:First Welder: Blue Hawk Flux-MIG 100 (no tanks, so only Flux for me right now)Second Welder: Miller MillerMatic 211 Auto-Set with MVP
Reply:Originally Posted by farmshopTurn up the heat. Most likely poor gas coverage or tried welding over some debris. I usually run higher flow rates of gas usually 20-25 cfh. I weld on steel like that quite frequently make sure you push the bead.
Reply:When kids interrupt welding,that should never happen.Are they getting flashed?
Reply:Originally Posted by farmer37When kids interrupt welding,that should never happen.Are they getting flashed?
Reply:Oils, dirty metal, too much stickout, poor gas coverage, gun angle. Try leaving the bottle off tiggin. POP CRACK HAHAPowcon 300st (my favorite)Miller Goldstar 600ssLincoln Idealarc 400/400Miller 12vs2 LN25'sMiller Deltaweld 302Miller Bobcat 250 G EFIMiller Bobcat 225d Plus (Dropped a valve, up soon)Everlast 255ext (ordering soon!)