Lincoln Electric FlexCut 125, Руководство оператора, Страница: 10 / 62

FLEXCUT™ 125
GENERAL DESCRIPTION
The FLEXCUT™ 125 is a constant current, continuous control plasma
cutting power source. It provides superior and reliable starting
characteristics, cutting visibility and arc stability. The control system
has a safety mechanism to ensure that the nozzle and electrode are in
place before cutting or gouging. This is extremely important due to
the high voltages involved.
The FLEXCUT™ 125 comes standard with an air regulator and digital
pressure display.
The FLEXCUT™ 125 initiates the plasma arc with a simple, yet
reliable, contact start mechanism. This system eliminates many of the
failure problems associated with hi-frequency start systems.
PREHEAT TEMPERATURE FOR PLASMA CUTTING
Preheat temperature control is not necessary in most applications
when plasma arc cutting or gouging. Preheat temperature control
may be necessary on high carbon alloy steels and heat treated
aluminum for crack resistance and hardness control. Job conditions,
prevailing codes, alloy level, and other considerations may also
require preheat temperature control. The following minimum preheat
temperature is recommended as a starting point. Higher temperatures
may be used as required by the job conditions and/or prevailing
codes. If cracking or excessive hardness occurs on the cut face,
higher preheat temperature may be required. The recommended
minimum preheat temperature for plate thickness up to 1/2"
(12.7mm) is 70°F (21.1°C).
DUTY CYCLE
The duty cycle of a plasma machine is the percentage of time in a 10
minute cycle at which the operator can operate the machine at rated
cutting current.
Example: 60% duty cycle means that it is possible to cut for 6
minutes, then the machine stops for 4 minutes.
Refer to the Technical Specification section for more information
about the machine rated duty cycles.
USER RESPONSIBILITY
Because design, fabrication, erection and cutting variables affect the
results obtained in applying this type of information, the serviceability
of a product or structure is the responsibility of the user. Variation
such as plate chemistry, plate surface condition (oil, scale), plate
thickness, preheat, quench, gas type, gas flow rate and equipment
may produce results different than those expected. Some adjustments
to procedures may be necessary to compensate for unique individual
conditions. Test all procedures duplicating actual field conditions.
DESIGN FEATURES AND ADVANTAGES
The FLEXCUT™ 125 design makes plasma cutting uncomplicated.
This list of design features and advantages will help you understand
the machine's total capabilities so that you can get maximum use
from your machine.
- Light weight and portable design for industrial use.
- Continuous control, 20 - 125 amps.
- Reliable touch start mechanism for plasma arc initiation.
- Rapid arc restrike for fast cutting of expanded metal.
- Input over voltage protection.
- Bright 5.0 second timed pilot arc.
- Gas purge selection.
- Air regulator and pressure gage included.
- Internal water separator included.
- Parts-in-Place mechanism to detect proper installation of
consumables and torch.
- Preflow/Postflow timing. Preflow is eliminated if arc is re-
initiated in Postflow.
- Thermostatic Protection.
- Solid state over-current protection.
- Patented electrode, nozzle and shield cap for optimum cooling,
cut quality and long life.
6