ESAB THERMAL DINAMICS CUTMASTER 60i Operating Manual page 44

CUTMASTER 60i
For optimum smooth surface quality, the
travel speed should be adjusted so that
only the leading edge of the arc column
produces the cut. If the travel speed is too
slow, a rough cut will be produced as the arc
moves from side to side in search of metal
for transfer.
Travel speed also affects the bevel angle of
a cut. When cutting in a circle or around a
corner, slowing down the travel speed will
result in a squarer cut. The power source
output should be reduced also. Refer to the
appropriate Control Module Operating Man-
ual for any Corner Slowdown adjustments
that may be required.
Piercing With Machine Torch
To pierce with a machine torch, the arc
should be started with the torch positioned
as high as possible above the plate while
allowing the arc to transfer and pierce. This
standoff helps avoid having molten metal
blow back onto the front end of the torch.
When operating with a cutting machine, a
pierce or dwell time is required. Torch travel
should not be enabled until the arc pene-
trates the bottom of the plate. As motion
begins, torch standoff should be reduced to
the recommended 1/8 - 1/4 inch (3-6 mm)
distance for optimum speed and cut quality.
Clean spatter and scale from the shield cup
and the tip as soon as possible. Spraying
or dipping the shield cup in anti - spatter
compound will minimize the amount of scale
which adheres to it.
OPERATION 0-5561
44