Lincoln Electric INVERTEC V270 Bedienungsanleitung Seite 6

For V270-T machines,
connect the gas hose
from the TIG torch to the
gas connector (B) on the
front of the machine. If
necessary, an extra gas
connector for the fitting on
the front of the machine is
included in the package.
Next, connect the fitting on the back of the machine to a
gas regulator on the cylinder of gas to be used. An input
gas line and the required fittings are also included in the
package. Connect the TIG torch trigger to the trigger
connector (A) on the front of the machine.
Remote Control Connection
Refer to the accessories section for a list of remote
controls. If a remote control is used, it will be connected
to the remote connector (C) on the front of the machine.
The machine will automatically detect the remote control,
turn on the REMOTE LED, and switch to remote control
mode. More information on this mode of operation will
be given in the next section.
Controls and Operational Features
A. Power Switch: Controls
the input power to the
machine. Make sure the
machine is properly
connected to the input
supply before turning the
machine on.
B. Fan: The cooling fan will
turn ON when the machine
is turned ON and it will
continue to run whenever
the output of the machine
is ON. If the output of the
machine is OFF for more
than five minutes, the fan
will turn OFF. This
reduces the amount of dirt
that is deposited inside the machine and reduces
power consumption. Refer to the Output LED
section below for more information about conditions
when the output of the machine is ON.
If a Coolarc 20 is connected to a V270-T, it will be
turned ON and OFF with the operation of the fan.
When Stick welding mode is used the Coolarc 20
will be OFF.
C. Gas Inlet (V270-T only): Connector for the TIG
shielding gas. Use the supplied gas line and
connector to connect the machine to the gas
source. The gas source must have a pressure
regulator and flow gage installed.
D. Mode Switch: This switch changes the welding
modes of the machine. The V270-S has two
welding modes: Stick (SMAW) and Lift TIG (GTAW).
The V270-T machines have three welding modes:
Stick (SMAW), Lift TIG (GTAW) and HF TIG
(GTAW).
When the mode switch is in the Stick position, the
following welding features are enabled.
• Hot Start: This is a temporary increase in the
output current during the start of the stick
welding process. This helps ignite the arc
quickly and reliably. The amount of hot start
can be adjusted on the V270-S, refer to Hot
Start, described below.
• Arc Force: This is a temporary increase in the
output current during normal stick welding.
This temporary increase in output current is
used to clear intermittent connections between
the electrode and the weld puddle that occur
during normal stick welding. The amount of arc
force can be adjusted on the V270-S, refer to
Arc Force, described below.
• Anti-Sticking: This is a function which
decreases the output current of the machine to
a low level when the operator makes an error
and sticks the electrode to the work piece. This
decrease in current allows the operator to
remove the electrode from the electrode holder
without creating large sparks which can
damage the electrode holder.
When the mode switch is in the Lift TIG position, the
stick welding functions are disabled and the
machine is ready for Lift TIG welding. Lift TIG is a
method of starting a TIG weld by first pressing the
TIG torch electrode on the work piece in order to
create a low current short circuit. Then, the
electrode is lifted from the work piece to start the
TIG arc.
The last mode switch position, HF TIG, is only
available on the V270-T. When the mode switch is
in this position, the stick welding functions are
disabled and the machine is ready for HF TIG
welding. During the HF TIG mode, the TIG arc is
started by HF without pressing the electrode on the
work piece. The HF used for starting the TIG arc
will remain on for 6.5 seconds; if the arc is not
started in this time limit, the trigger sequence must
be restarted.
6