Lincoln Electric IM10026 TOMAHAWK 1000 - Manual (Page 18)

B-8 OPERATION B-8
Suggestions for Extra Utility from the
TOMAHAWK™ 1000 System:
1. Occasionally an oxide layer may form over the tip
of the electrode, creating an insulating barrier
between the electrode and nozzle. This will result
in false starts. When this happens turn the power
off, remove the shield cup and nozzle. Rub the
inside surface of the nozzle, this will help remove
any oxide buildup. Also, clean any oxide build up
from the electrode. Replace the shield cup and
nozzle, turn on the power and continue cutting. If
false starts continue to occur after cleaning the
consumables, then replace them with a new set.
Do not continue to try and cut with excessively
worn consumables as this can cause damage to
the torch head and will degrade cut quality. Do not
allow torch cable or body to contact hot surfaces.
2. To improve consumable life, here are some sug-
gestions that may be useful:
• Make sure the air supply to the TOMAHAWK™
1000 is clean and free of oil. Use several extra
in line filters if necessary.
• Minimize dross buildup on the nozzle tip by
starting the cut from the edge of the plate when
possible.
• Pierce cutting should be done only when nec-
essary. If piercing, angle torch about 30° from
the plane perpendicular to the work piece,
transfer the arc, then bring the torch perpendic-
ular to the work and begin parallel movement.
• Reduce the number of pilot arc starts without
transferring to the work.
• Reduce the pilot arc time before transferring to
the work.
TOMAHAWK™ 1000
ELECTRIC SHOCK CAN KILL.
• Turn off machine at the disconnect
switch on the rear of the machine
before tightening, cleaning or replacing
consumables.
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WARNING
• Set air pressure to recommended setting. A
higher or lower pressure will cause turbulence
in the plasma arc, eroding the orifice of the
nozzle tip.
• Use only Lincoln consumable parts. These
parts are patented and using any other replace-
ment consumables may cause damage to the
torch or reduce cut quality.
• Where possible, start the cut from the edge of the
work piece.
• Keep moving! A steady speed is necessary. Do not
pause.