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As I ve stated before , I ve been wanting to test my MM 210 to see if it would produce spray transfer with at least an .030 wire. So on Friday, I was finally able to make it to Praxair to get the bottle of shielding gas that I needed. Wouldn t you know it, the only size bottle that they stock is a style T, which is a 330 cubic ft bottle. The dang thing is 5 ft tall. The last time I wrestled that size of bottle around was back when I was in school. They only stock this size of bottle because spray transfer is generally a production process. Now obviously, I m not wanting to fork out the cash for such a large bottle on an experiment. Once again my salesman came through for me. He was nice enough to loan me a partial bottle that they had in there test room. It turns out though that the bottle was C10 which is 90% argon/ 10% CO2. This is still a spray transfer gas, but I was wanting 98% argon/ 2% O2. Reason for the 98/2 is because it will produce spray transfer at lower parameter settings then other mixtures. And also, because it is the only gas mixture that I have ever used for spray. Anyway, since the 90/10 was free to try, I went ahead and took it, however very worried that the Co2 content of the gas was going to push spray transfer past the voltage out put of my machine. So today I set my MM 210 up with an .030 wire and the 90/10 gas and gave spray a try on some 1/4". Guess what, it worked . Now this wasn t good enough for me. I just had to give an .035 wire an attempt too. So , I set the machine up at the following parameters: voltage tap # 7 and about 62 on the wire speed. The 62 setting, on my machine, this measured out to be around 400 to 410 IPM. I measured this 6 times and each time it fell somewhere in this range. Once again the experiment was on 1/4" material. Joint design was a T joint. So I went ahead and gave it a try, and guess what, Spray transfer . So forget about the .030, the .035 works. Now, I still want the 98/2 gas because like the way the weld puddle wets out with it. Also, the final weld bead has a smoother appearance to it.
Now, if you have been around here long enough you know I ve got some pictures to show you. I m going to post 4 of them, mainly because I m not really certain abouit the quality of the picture. For some reason my magical camera just doesn t seem to be its normal self this evening. Anyway here are the pictures. They are all T joints, on 1/4" mild steel.
Now, if you have been around here long enough you know I ve got some pictures to show you. I m going to post 4 of them, mainly because I m not really certain abouit the quality of the picture. For some reason my magical camera just doesn t seem to be its normal self this evening. Anyway here are the pictures. They are all T joints, on 1/4" mild steel.
If so it would be interesting to compare one of your spray transfer welds with a short circuit weld on the same material with the same machine.
. I got so excited about trying it that I skipped sanding the mill scale off my first peice, and then when it actually worked, all I was thinking is were is my .035. When I put that on and it worked too, I was beyond excited and totally forgot about the mill scale. So everyone knows though when I am welding on an actual project, I always remove the mill scale.
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