KKKustom exhaust at ASS (lots of pics)

[KrazyKid]

@tougethisDB1

using helium in the mix definately allows for better penetration in thick materials. although mostly used with aluminum welding helium can work well on other things, its also a great way to get above 100% duty on limited machines. if you wouldnt normally have a need to weld say 3/8’s aluminum plate but a wierd circustance came up where you would need to, you could incorporate helium in your mix to get the job done. obviously if you doing thicker material all the time upgrading your welder would be more cost effective in the long run, but its a nice trick if you need it in a bind.

@ninety1two40

How can you get above 100% duty?

I dont think he ment to really say duty cycle, as in 10seconds on, 2 seconds off… I think he ment 185amps is what my machine puts out, I can weld 3/8th aluminum with it nicely. If I use a hotter gas I can do a little thicker material on max amperage that the machine will put out.

there are other tricks to get more out of the max amps on the machine. AC you can change the EN settings. Less cleaning action will put more current on the work side. remember AC is alternating, where the cleaning action comes from. say 60 cleaning 40 heat on 185 amps you can do 1/4 aluminum, if you take some cleaning EN out and make it 50-50 have the current hits the work and half back at the torch (also keeps the torch cooler) now you might be able to do 3/8’s. Pulsing also helps to get more penitration with less HAZ on the piece to prevent warping or distortion.