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I am welding quarter inch plate, vertical fillets. I am using 90/10 gas (25 CFH), 0.035 wire (L56), the WFS is 225 ipm, the arc length is turned down to 45 (this is the same as "trim" on a Lincoln, but different scale, the default is 50 and goes from 0-100), arc control is set at 30 (Sharp arc on a 350P, not sure if there is an equivalent setting on a Lincoln, default is 25 and range is 0-50). I am getting semi decent beads without any significant crown and the metal is not dripping out of the puddle. Most of the issues are me working on my travel speed consistency. trying to keep a flat gun angle and proper CTWD. The puddle seems nice most of the time (not too wet, not too stiff/dry), but sometimes, the arc seems to slip out of pulse spray and into a globular transfer and everything goes to sh!t. I am not sure if I am just losing shielding gas because I have the garage door open, or if it is something else, like maybe I need to turn up the WFS? Everything has been ground bright and shiny clean and I have the work clamp right on the metal being welded (inches from the weld), so there should be no issues with mill scale or poor grounding. I have experimented with the settings to see what I liked the best and the ones above seem to be best. I had the WFS as low as 200 and as high as 275 (dripping right out of the puddle above 250), I have had the arc length anywhere from 35 to 55 and the arc control anywhere from 25-35 If I go to low on the arc length or the arc control, it really starts to crackle and pop. The settings I landed on seem to give a good arc with no popping or crackling (except when it drops into globular transfer) without being too fluid of a puddle.Miller Multimatic 255
Reply:At 225 IPM, what is the arc voltage set to at the machine when the arc length parameter is set to 50? When you saw it go into globular, did you notice a lot more sparks/spatter?

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Reply:I would try turning up the gas flow some before experimenting with other adjustments. 25 scfh isn't by any means excessive, especially when you figure in the possibility of the gas getting affected by draft. |
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