Spot welding challenge, question

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Hey, Guys. Sorta a newbie to welding and mostly self taught on a small mig, GMAW and FCAW. I've got a new problem with some artwork I'm doing. I need to attach very thin sheet metal pieces, about 30ga. galv to 1/8" cold rolled steel rod. I was going to run out and get a spot welder, but then I read the "3 to 1" thickness ratio and I'm thinking I'll have trouble or it won't work well. I've tried dialing in my mig just to make a quick "tack" which is all I really need, but the thin sheet just vanishes under the heat. Any suggestions on how to make these many attachments quickly and permanantly?All the best, Don
Reply:If you can get a piece of copper behind the thin metal, it will act as both a heat sink and a backer but won't stick to the sheet steel.  same idea as a welders spoonhttp://www.harborfreight.com/welding-spoon-66785.htmlMiller 250x & Lincoln V205-TSmith Oxy-Prop torch
Reply:Thanks, Chuck - I'm out to the shop to try it now.
Reply:Ive gotten by by making sure the arc starts on the thicker piece and then sort of "rolling" the puddle into the thinner metal without actually letting the arc hit it
Reply:Hey, Guys and thanks so much for trying to help. The copper almost worked, but it's not consistent enough to bet on every time. And yes, Ironman, I tried that many times too and it almost works a good percentage of the time, but I think my sheet metal is just too thin. I gave up and those connections are now being soldered. Learn something everyday - remembering it is the problem.All the best, Don