I think you might be mis-interpretating the term "penetration" it does not mean all the way through the weld so that molten metal is coming out the other side on thin metal the likes of what we are using "penetration will be sufficient when there is some outer discolouration with a little roughness in the centreline of the weld....that roughness shows the fusion process has reached through the metal and penetration is good without that part of the metal literally melting.
I'm sure some one on here will show you a piccy of the back of a weld that has good "penetration" hope this helps dude.
ps I use a similar machine with the 4 switches and I use 2-3 and a feed rate of 6-7
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31st August 2011, 06:15 PM
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