ESAB 0558002834, Instruction Manual

Page: 17 / 48

SECTION 3 OPERATION
17
Figure 3-1. PCM-1125 Controls
E. When ending a cut, the torch switch should be
released (press and release if using trigger LOCK
mode) and lifted off the workpiece just before the
end of the cut. This is to prevent the high frequency
from reigniting after cutting arc extinguishes and
causing damage to the nozzle (double arcing).
F. For rapid re-starts, such as grate or heavy mesh
cutting, do not release the torch switch. In the
postflow mode, the arc can be re-started immedi-
ately by depressing the torch switch. This avoids
the 2-second preflow portion of the cutting cycle.
REAR VIEW
AIR REGULATOR
CONTROL KNOB
FAULT LIGHT
(AMBER)
POWER LIGHT
(WHITE)
AIR
PRESSURE
GAUGE
AIR TEST
SWITCH
TRIGGER LOCK
SWITCH
CURRENT
CONTROL
KNOB
POWER ON-OFF
(I-O) SWITCH &
CIRCUIT BREAKER
FUSE (3A)
Figure 3-2. Recommended Torch Angle of 5° to 15°
NOTE: When replacing the nozzle, always inspect the
electrode for wear. If less than 19/32" of elec-
trode shaft is remaining, replace the electrode.
If the electrode is used beyond this recom-
mended wear limit, damage to the torch and
power source may occur. Nozzle life is also
greatly reduced when using the electrode below
the recommended limit. Refer to Figure 3-3.
Figure 3-3. Electrode Wear Limit
19/32"
3.3.1. Drag Cutting with the PT-27/PCM-1125 System
Reduce current to 40 Amperes. Then follow steps in
Section 3.3.
(15.1 mm)
ELECTRODE
REPLACE ELECTRODE BEFORE
LENGTH BECOMES SHORTER
THAN 19/32 INCH (15.1 MM)