Longevity WeldAll 160PI/200PI/250PI - Manual (Page 28)

160PI/200PI/250PI AC/DC Series IGBT Machines
www.longevity-inc.com 27
Know Your Amperage, Know Your Metal
At www.longevity-inc.com , 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.
All articles are composed by the Longevity Facility Testing Team and
are written with expressed interest of maintain a strong standard in
Longevity Global Inc. quality, to help address topics, and answer
questions for amateur and experienced users alike. Please remember to
always exercise extreme causation and abide by all provided safety
specification.