Longevity FORCECUT 50i User Manual
Page 30
PLASMA CUTTERS www.LWELD.com
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www.longevity-inc.com
the awesome power of your LONGEVITY Plasma Cutter, remember
we want you to be able to enjoy the results of your work time and time
again. So, in situations when you are going to be cutting thick metals at
high amperage with your LONGEVITY Plasma Cutter, we recommend
you start with the torch pointed at a 45 degree angle. This angled
approach allows for the first blast of metal to be released with out back
splash on to your valuable consumables.
Know Your Amperage, Know Your Metal
you can see the cutting thickness
capability.
Understanding the amperage in relation to your cut speed is important.
Some metals respond differently than others. For example the faster
you move on a material such as aluminum, the cleaner your cut will be.
Conversely, when using your LONGEVITY Plasma Cutter to cut
thicker material, set your unit to full output and vary your travel speed
accordingly. Thin material requires you to turn down the amperage and
change to a lower-amperage to achieve a narrow kerf.
Figuring out if you are going too slow or too fast can be a daunting task
that really only comes with time and experience. However, our guys in
the LONGEVITY Facility Testing Team have a few pointers for you:
If your cut has a lot of spray back then you are probably going
too fast.
If the arc exits the material going straight down then you are
probably moving too slow and you will have an unnecessary
buildup of "dross" or "slag."
Your arc should be exiting the material at a 15 - 20 degree angle,
but opposite the direction of your cut path.
Using A Cutting Guide
First thing in using a torch guide with your LONGEVITY Plasma
Cutter is make sure it isn't flammable! Aluminum works as a great
torch guide, but be sure it is attached to the torch cup and not the torch
tip. Aluminum is a great contact guide because of it's smooth surface
but be wary of the torch tip because of electrical conductivity of
aluminum. It would be a terrible mess of a cut, loss of consumables,
and overall depressing mistake if your torch guide melted to the torch
tip or the project at hand. Next you want to mark the material to be cut
with either white chalk or a black marker. If you are unsure of how
steady your hands are, we recommend you try using a straight edge
clamp attached to the work piece or torch guide.