Lincoln Electric FlexCut 80 Operator's Manual page 32

FLEXCUT™ 80
Suggestions for Extra Utility from the
FLEXCUT™ 80 System:
WARNING
ELECTRIC SHOCK CAN KILL.
• Turn off machine at the disconnect
switch on the rear of th machine
before tightening, cleaning or
replacing consumables.
CONSUMABLE LIFE
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 suggestions that may
be useful:
• Use only Lincoln consumable parts. These parts are patented
and using any other replacement consumables may cause
damage to the torch or reduce cut quality.
• Make sure the air supply to the FLEXCUT™ 80 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 necessary. If
piercing, angle torch about 30° from the plane perpendicular
to the work piece, transfer the arc, then bring the torch
perpendicular 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.
• 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.
B-18
OPERATION