Thermal Dynamics CutMaster 58 - 4 T.06 Mechanized Torch Operation

CUTMASTER 58
Manual 0-5544 OPERATION
4T-7
4T.06 Mechanized Torch Operation
Cutting With Mechanized Torch
The mechanized torch can be activated by remote
control pendant or by a remote interface device such
as CNC.
1. To start a cut at the plate edge, position the center
of the torch along the edge of the plate.
Travel Speed
Proper travel speed is indicated by the trail of the arc
which is seen below the plate. The arc can be one of
the following:
1. Straight Arc
A straight arc is perpendicular to the workpiece
surface. This arc is generally recommended for the
best cut using air plasma on stainless or aluminum.
2. Leading Arc
The leading arc is directed in the same direction as
torch travel. A ve degree leading arc is generally
recommended for air plasma on mild steel.
3. Trailing Arc
The trailing arc is directed in the opposite direction
as torch travel.
Standoff Distance
Straight Arc
Trailing Arc
Leading Arc
Direction of Torch Travel
A-02586
Mechanized Torch Operation
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 aects 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 Manual 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
stando 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 en-
abled until the arc penetrates the bottom of the plate.
As motion begins, torch stando 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 pos-
sible. Spraying or dipping the shield cup in anti - spatter
compound will minimize the amount of scale which
adheres to it.