Lincoln Electric IM422 PRO-CUT 40 - Manual (Page 10)

Air Input Connections
A source of clean, compressed air or nitrogen must be
supplied to the PRO-CUT 40. The supply pressure
must be between 70 and 150 psi (482 and 1032 kPa).
The flow rate is approximately 4.7 cfm. Oil in the air is
a very severe problem and must be avoided.
Remove the plastic thread protector from the regulator
input port (located on the back of the machine). Use a
suitable gas connection fitting to make the connection
to the available air supply. The input port is a 1/4”
NPT thread. Tighten the air fitting to prevent leakage
but do not overtighten. The use of Teflon tape to seal
the connection is recommended.
Nitrogen from cylinders may be used with this
machine. The cylinder of nitrogen gas must be
equipped with a pressure regulator. No more than
150 psi (1032 kPa) may be supplied to the regulator
on the machine. Install a hose between the regulator
on the gas cylinder and the gas inlet on the cutter.
OUTPUT CONNECTIONS
Torch Connection
The PRO-CUT 40 comes factory equipped with a cut-
ting torch. Cutting torches come with a 25 ft. (7.6 m)
or a 50 ft. (15.2 m) cable.
Illustrations of the torch along with the required
replacement parts are shown in the parts lists as
P210-E and Figure 1. The ends of the cable to be
connected to the power source are unique. Follow the
applicable instructions as given in Figure 1 of the
parts lists.
OPERATING INSTRUCTIONS
Sequence of events:
A. Turn on the line power.
B. Connect the air supply to the machine.
C. Turn the power switch on.
-The green “Power On” LED should begin to
glow.
-The fan should start.
-If the “Safety” LED is glowing, push the “Safety
Reset” button. If there is no problem, the LED
will go off. If there is a problem, refer to Step 5
of the Test Step Chart , and the Troubleshooting
Guide.
D. Set the Purge/Run switch to Purge.
-The air should start.
-The “Air Pressure” LED should be lit.
-Adjust the air regulator for 70 psi (482 kPa).
E. Set the Purge/Run switch to Run.
-The air will continue to run for 20 seconds of
postflow. If the trigger is activated within this
time period, the pilot arc will immediately start.
F. When ready to cut, connect the work lead clamp to
the piece to be cut, place the torch near the work,
make certain all safety precautions have been
taken and pull the trigger.
-Air will flow for a preflow time of 2 seconds
and the pilot arc will start. (This is true unless
the machine is in postflow, then the preflow time
is skipped and the pilot arc will start
immediately.)
-The “Output On” LED will light.
-The pilot arc will run for 3.0 seconds and shut
off unless the plasma is brought in contact with
the work and the arc is transferred.
-When the arc is transferred, cutting begins.
Finish the cut to be made and release the trigger.
G. When the trigger is released, the arc will stop.
-The air will continue to run for 20 seconds of
postflow. If the trigger is activated within this
– 10 –
CYLINDER may explode if damaged
• Keep cylinder upright and chained to a
fixed support.
• Keep cylinder away from areas where it
may be damaged.
• Never lift equipment with cylinder attached.
• Never allow the cutting torch to touch cylinder.
• Keep cylinder away from live electrical circuits.
• Maximum inlet pressure 150 psig.
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WARNING
HIGH FREQUENCY SHOCK CAN
CAUSE INJURY OR FALL.
• Keep the cutting torch and cables in
good condition.
• Secure yourself in position to avoid a fall.
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WARNING