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OPERATION
PRO-CUT 60
B-7
Cutting Expanded Metal
1. Cut expanded metal with OUTPUT
CURRENT CONTROL set near the mid-
range position using the same methods
listed under Cutting Thin Gauge Metal.
Keep the following points in mind:
a. Place a thin piece of scrap metal over
the area to be cut and then cut
through both to make cutting easier.
b. After 30 seconds of cutting expanded
metal, the pilot arc changes from a
bright continuous arc to an arc that
rapidly goes on and off. This
produces a slight spatter. You can
still cut metal when this condition
occurs as long as metal has been cut
in the last five seconds. If metal is not
cut in this condition for more than five
seconds, the arc shuts off and the
machine goes into postflow.
c. The pilot arc duty cycle is 20 seconds
out 80 seconds. If the torch trigger is
continuously pulled and released to
obtain a bright, continuous arc, the
duty cycle limit will be reached and
the arc will be turned off for the duty
cycle limit. When the arc is turned off,
the OUTPUT ON and FAULT LEDs
flash alternately.
Cutting Thick Sections of Metal
1. Set the OUTPUT CURRENT CONTROL
above the mid-range (Red) position.
a. Use the minimum current needed to make
a satisfactory cut.
2. Hold the torch nozzle about 1/8" (3.2mm) from
the cutting surface. Do not let the torch nozzle
touch the work or carry a long arc.
a. Use the S24114 Drag Cup to protect the
torch.
b. Use only the .052" (1.3mm) or the .042"
(1.0mm) nozzles. Do not use the .035"
(0.8mm) nozzle for cutting thick sections of
metal.
3. Start the cut from the edge of the work piece
when possible. Pierce the work piece by slow-
ly lowering the torch onto the metal at a 30
0
angle. This will blow the dross away from the
torch tip. Slowly rotate the torch to vertical
position as the arc becomes deeper. See
Figure B. 2.
4. Keep moving while cutting. Cut at a steady
speed without pausing.
FIGURE B.2 -- Cutting Thick Piece of Metal.
3030
00
VERVERTICAL ANGLETICAL ANGLE
FOR CUTTINGFOR CUTTING
CUT
90
0
TORCH AT 30
0
ANGLE
TO PIERCE
ROTATE TO
90
0
ANGLE TO CUT
3/993/99
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