Splatter Help

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This is my first post here so if I have skipped over any rules please let me know. I have a miller 211 autoset and welding up some mild steel 16 gauge exhaust tubing. Running into a couple of issues. When I am welding with the .23 ER70S-6 wire I can lay down some really really good welds with little to no splatter, but when I have to step to .30 309l stainless wire to weld some stainless v-bands on the ends I get massive splatter. Just wondering how do I keep splatter down when I have to use larger wire. This is not isolated to the stainless wire as I have the same issue with .35  ER70S-6. Any help will be greatly appreciated Patrick
Reply:Patrick, excessive spatter usually comes from wire speed too low in relation to voltage.  Either turn your wire speed up, or turn your voltage down to control it.
Reply:I think you'll find it's the opposite, wire feed too high/volts too low
Reply:uhmmmm haha do I take the red pill or the blue pill??
Reply:I would also try increasing the wrie speed till you get the right sound.  They also make a spray you can coat the welding area to keep the splatter from sticking.  Keep you gas nozzle clean as well.Dan
Reply:The type of shielding gas will also have an effect.  Obviously you just have to fine tune.  Sometimes the adjustment is very small... just a tweak and it runs much better.  Carbon dioxide produces more spatter than mixes. Stainless requires special mixes to weld with hard wire.  I would check the wire manufacturer's recommended gas mix for stainless.
Reply:According to post #8 in the link below, you need to take the blue AND the red pills.  Several other good points are made in this thread as well.http://weldingweb.com/vbb/showthread.php...hlight=spatter
Reply:A couple of points that may help:Are you using the Auto-set function? It is meant for steel wire only, and I'm not sure if it works for different wire sizes (I don't own one). Also, Auto-set will get you "in the ballpark" but may require tweaking for different circumstances.If you are using 75/25 you will not get good welds with stainless wire. You should use Argon with 2 - 5% CO2 or tri-mix (90% He, 7.5% Ar, 2.5% CO2).Considering that .035  wire is maxing out the capabilities of the MM211, I vote for the voltage being too low for the wire speed, as the cause for the spatter.HTH,JohnA few weldersA lot of hammersA whole lot of C-clamps