Lincoln Electric IM10020 TOMAHAWK 625 - Manual (Page 15)

B-5 OPERATION B-5
5. Air Pressure Gauge and Regulator Knob: Allows
regulation and monitoring of the air pressure.
Items 6 thru 9 on the back of the TOMAHAWK™
625 (See Figure B.3)
6. Fan: Provides machine cooling. When the machine
is switched ON, the fan runs continuously.
7. Power Switch: Turns ON / OFF the input power to
the machine.
8. Input cable: Connects unit to the input power.
9. Air Inlet: External Air operating mode only.
Compressed Air Connection.
Clean, dry air must be supplied to the machine. A
pressure setting above 110 PSI (7.5 bar) could
damage the torch. Failure to observe these pre-
cautions could result in excessive operating tem-
peratures or damage to the torch.
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CUTTING PROCESS
When preparing to cut, position the machine as close
to the work as possible. Make sure to have all materi-
als needed to complete the job and have taken all
safety precautions. It is important to follow these oper-
ating steps each time the machine is used.
FIGURE B.3
Turn the machine's ON/OFF POWER SWITCH to the
OFF position.
• Connect the air supply to the machine.
• Turn the main power on and the machine power
switch to the ON position.
- The fan will start.
- The pre-charge circuit will operate for 3 seconds,
then the green "Power" LED will illuminate.
• Attach the work lead clamp to the workpiece before
cutting.
• Set the output current control knob to maximum
position for higher cutting speed and less dross for-
mation. Reduce the current, if desired to reduce the
kerf (cut) width, heat affected zone, or travel speed
as required.
Note: If the circuit breaker trips while cutting at high-
er amperages - reduce the cutting amperage
on the unit, or provide an input circuit with
higher current capacity.
• Rotate the output knob into the purge zone to check
or set the gas pressure. Pull the pressure regulator
cap out and turn it to set the pressure.
- Adjust the gas regulator for 75-80 PSI (0.50-0.55
MPa).
- Turn the output knob out of the purge zone.
- The gas will immediately turn off. The pressure
gage may show an increase in pressure after the
air turns off but this is normal. Do NOT reset the
pressure while the air is NOT flowing.
TOMAHAWK™ 625
WARNING
9 8 7 6