B-5
OPERATION
B-5
Clean, dry air or gas must be supplied to the
machine. A pressure setting above 110 PSI (7.5
bar) could damage the torch. Failure to observe
these precautions could result in excessive oper-
ating temperatures or damage to the torch.
------------------------------------------------------------------------
CUTTING PROCESS
The air plasma cutting process uses air or nitrogen as
a cutting gas and to cool the torch.
The pilot arc is initiated as follows: The torch trigger
energizes a solenoid valve. This valve enables the
gas to flow during the cutting and post-flow stages.
The TOMAHAWK™ 1000 provides constant current at
the set value, independent of the plasma arc length.
When preparing to operate, make sure you have all
materials needed to complete the job and have taken
all safety precautions. Install the machine as instruct-
ed in this manual and remember to attach the work
clamp to the work piece.
• With the machine switched OFF, prepare the torch
with the consumables adequate to the desired
process (CUT / GRID / GOUGE). Refer to the con-
sumable Charts on pages B-9, B-10.
• Connect the Torch and the work cable to the
machine.
• Turn ON the Power Switch on the back of the
machine; the Input Power LED on the front panel
will illuminate. The unit is now ready to operate.
• Verify correct gas pressure using the Gas Purge
function.
• Select the desired process using Operating Mode
pushbutton.
• Set the desired cutting current using the Output
Current knob.
To start the selected process pull the torch trigger,
making sure you are not aiming the torch in an
unsafe manner.
Once the process is completed releasing the torch
trigger will cause the plasma arc to turn off. The gas
flow will continue, allowing the torch to cool.
TOMAHAWK™ 1000
WARNING
7. Primary Air, Gas Pressure Gauge and
Regulator Knob:
Allows the regulation and monitoring of
the primary air/gas pressure.
The inlet primary air/gas pressure is
limited by this pressure regulator, set at
the factory to 80 PSI (5.5 bar). To
adjust the air/gas pressure, place the
machine in Purge mode.
8.
Cutting Operating Mode
Selection:
Press the pushbut-
ton to select the desired operat-
ing mode (the LED indicates the
selected mode):
• CUT (Upper LED): for cutting or piercing opera-
tions on a solid work piece.
• GRID (Middle LED): for cutting operations on a
grid work piece.
• GOUGE (Lower LED): for removing material from
a solid work piece (removing a weld).
The Operating Mode can only be changed with the
machine at idle or during Purge or Post Flow times.
Pressing the pushbutton during Pilot Arc or Cutting
will have no effect.
Items 9 thru 12 on the back of the TOMAHAWK™
1000 (See Figure B.3)
9. Fan:
Provides machine cooling. When the machine
is switched ON, the fan runs continuously.
10. Power Switch:
Turns ON / OFF the input power
to the machine.
11. Input cable:
Connects unit to the input power.
12. Air or Gas Inlet
: Compressed Air or Gas
Connection.
FIGURE B.3
1MPa = 145 psi
11
10
9
12
Summary of Contents for 1000
Page 4: ...NOTES ...
