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Hey guys,
I’ve been a long time reader but this is my first post. You all have many great ideas and input to the world of welding and it is much appreciated. I would consider myself pretty good at most welding applications since I went through the welding program at the local junior college a few years back. I purchased a MM 212 about a year ago and it has worked great for me. Just recently I have noticed something particularly unusual.
When the machine is powered on for the first time that day, it runs the first bead (about 3-4 inches long) very nice with good uniformity. As you continue to use the machine as it warms up, the popping noise gets more pronounced and the filler will burn back up into the torch, then drop a glob of filler, then burn back up, then drop and so on. FYI – I have been running 75%/25% shielding gas with .030” ER70S-6 filler at tap 5 with a speed of 64. I set the gas at approx. 25 – 30 cfh. I adjusted the tension today (holding the gun and pointing towards the floor – set so it just barely wants to push the gun upwards from the floor when the trigger is pulled) and thought that may have helped some and also noticed that if you don’t pay attention and let the cable get into a loop tighter than about 2 ft. dia. it seams that might cause the problem to occur more often too...not sure. But I’m still baffled…could it be the filler size? Too small running at such a high setting on the machine?? Just curious on your input and if you’ve had this problem before.
Thanks!
Dan
I’ve been a long time reader but this is my first post. You all have many great ideas and input to the world of welding and it is much appreciated. I would consider myself pretty good at most welding applications since I went through the welding program at the local junior college a few years back. I purchased a MM 212 about a year ago and it has worked great for me. Just recently I have noticed something particularly unusual.
When the machine is powered on for the first time that day, it runs the first bead (about 3-4 inches long) very nice with good uniformity. As you continue to use the machine as it warms up, the popping noise gets more pronounced and the filler will burn back up into the torch, then drop a glob of filler, then burn back up, then drop and so on. FYI – I have been running 75%/25% shielding gas with .030” ER70S-6 filler at tap 5 with a speed of 64. I set the gas at approx. 25 – 30 cfh. I adjusted the tension today (holding the gun and pointing towards the floor – set so it just barely wants to push the gun upwards from the floor when the trigger is pulled) and thought that may have helped some and also noticed that if you don’t pay attention and let the cable get into a loop tighter than about 2 ft. dia. it seams that might cause the problem to occur more often too...not sure. But I’m still baffled…could it be the filler size? Too small running at such a high setting on the machine?? Just curious on your input and if you’ve had this problem before.
Thanks!
Dan
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