Lincoln Electric 12716, Руководство оператора, Страница: 40 / 64

OPERATION
WELDER OPERATION
STICK (SMAW)
TIG (GTAW)
FRONTIER
®
400X
B-19
CROSSLINC® TECHNOLOGY
This machine has been equipped with CrossLinc® Technology to
provide voltage and amperage control at the arc without the need
for additional cables. CrossLinc technology allows for remote
control of the welding output using the weld cables rather than a
separate cable when connected to a CrossLinc compatible wire
feeder or remote control.
To start CrossLinc, simply connect a CrossLinc enabled
accessory to the machine using the standard weld power cable
and the attached the sense lead from the accessory to work
piece. When weld output is ON, the CrossLinc accessory will
automatically link to the machine, and a CrossLinc indicator light
will appear on both the accessory and machine to show active
communication. No additional pairing of the machine to the
device is needed.
When CrossLinc is active, the remote control is disabled and the
CrossLinc device will set values remotely.
CrossLinc technology uses a communication protocol coupled
in the electrode and work cables. For best performance the total
voltage drop in the welding loop should be kept under 10V.
CrossLinc is not compatible with High Frequency TIG. If high
frequency is in the area, the cables need to routed as far as
possible from each other. Also, follow all high frequency best
practices, including a driven earth ground.
For Touch Start TIG applications, the machine should be placed
on HIGH idle to ensure the most robust CrossLinc connection.
DUTY CYCLE
Duty cycle is the percentage of time the load is being applied in a
10 minute period. For example, a 60% duty cycle represents 6
minutes of load and 4 minutes of no load in a 10 minute period.
NOTE: The duty cycles for the IEC rated output and max output
are listed on the rating plate of the machine.
PARALLELING
When paralleling machines in order to combine their outputs, all
units must be operated in a constant current (CC) mode at the
same output settings. To achieve this, select the STICK weld
mode. Operation in other modes may produce erratic
outputs, and large output imbalances between the units.
ARC GOUGING MODE
For optimal performance when arc gouging, select to the
GOUGING weld mode and use the knob to adjust output current
to the desired level for the gouging electrode being used
according to the ratings in Table B.2 above.
For optimal performance when arc gouging, it is recommended
to set the machine to HIGH IDLE.
NOTE : If desired the CV-WIRE mode can be used for arc gouging
applications.
Maximum current setting is limited to 400 amps.
TABLE B.2
ELECTRODE CURRENT RANGE
DIAMETER DCEP (+)
1/8" (3.2 mm) 30-60 Amps
5/32" (4.0 mm) 90-150 Amps
3/16" (4.8 mm) 200-250 Amps
1/4" (6.4 mm) 300-400 Amps
5/16" (7.9 mm) 350-450 Amps
The Frontier
®
400X can be used with a broad range of DC stick
electrodes.
The Stick (SMAW) weld mode is designed for horizontal, vertical-
up and over head welding with all types of stick electrodes,
especially low hydrogen. Once the mode is selected, the output
can be adjust by using the knob located on the user interface.
ARC FORCE sets the short circuit current during stick welding.
Increasing the number from -10 (Soft) to +10 (Crisp) increases
the short circuit current and prevents sticking of the electrode to
the plate while welding. This can also increase splatter. It is
recommended that the ARC FORCE be set to the minimum number
without electrode sticking. Start with the knob set at 0.
The Frontier
®
400X can be used in a wide variety of DC TIG
welding applications.
Once TIG (GTAW) mode is selected, the operator has the option to
select TOUCH START TIG or SCRATCH START from within the weld
settings.
If TOUCH START TIG is selected, to initiate a weld, set the output
to the desired current and the tungsten is touched to the work.
During the time the tungsten is touching the work, there is very
little voltage or current and, in general, this avoids tungsten
contamination. Then, the tungsten is gently lifted off the work in
a rocking motion, which establishes the arc.
To stop the arc, simply lift the TIG torch away from the work
piece. When the arc voltage reaches approximately 30 volts, the
arc will go out and the machine will automatically reset to the
touch start current level. The tungsten may then be retouched to
the work piece to restrike the arc. The arc may also be started and
stopped with an amptrol or arc start switch.
NOTE: While using TOUCH START TIG mode, it is important to use
the proper welding cable size to ensure expected performance
levels.
If SCRATCH START is selected, the operator can scratch the
tungsten against the work to initiate the arc.
Further, the operator can activate pulsed TIG by adjusting the
frequency from “OFF” to a value between 0.1-20 Hz will turn on
pulse TIG. The frequency changes the number of pulses per
second. Pulse TIG can help to minimize burn through on thin
materials by reducing the heat input.