Suggestions For Extra Utility From The Tomahawk; 375 Air System - Lincoln Electric TOMAHAWK 375 AIR Service Manual

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Suggestions for Extra Utility from the
TOMAHAWK

375 AIR System:

®
WARNING
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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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
the tripping of the TOMAHAWK
circuit. When this happens turn the power off,
remove the nozzle and electrode and use the elec-
trode to rub against the inside bottom surface of the
nozzle. This will help remove any oxide buildup.
Replace the nozzle, turn on the power and contin-
ue cutting. If the safety circuit continues to trip 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 surface.
2. To improve consumable life, here are some sug-
gestions that may be useful:
• Make sure the air supply to the TOMAHAWK
375 AIR 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.
OPERATION
375 AIR's safety
®
®
TOMAHAWK ® 375 AIR
• 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.
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