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M. Postflow Control (V160-T machines only): In the TIG
welding modes, this control knob will adjust the
shielding gas postflow time from 0.5 to 30 seconds.
(The preflow time is always 0.5 seconds.) In Stick
welding mode, this is not used.
N. Meter (V160-T Pulse only): This meter displays the
preset welding current before welding and the actual
welding current during welding. Like the output
current control, the function of the meter is changed
if a remote control is connected. If the Remote LED
is ON, this indicates that a remote control is
connected and the meter will display the following
information before welding (during welding, the meter
always displays the actual welding current):
Stick Welding Mode: The meter displays the preset
welding current but this is adjusted from the remote
control as explained in the Output Current Control
section.
TIG Welding Modes: The meter displays the
maximum output current which is set by the output
current control knob. The preset welding current is
then adjusted by the remote control, but it is not
displayed on the meter.
O. Pulsing Mode Switch (V160-T Pulse only): In the TIG
welding modes, this switch turns the pulsing function
ON and controls the pulsing frequency range (20Hz
or 300Hz). In Stick welding mode, this is not used.
P. Pulsing LED (V160-T Pulse only): This indicator
shows the pulsing frequency when pulsing is turned
ON. With this indication, the operator can adjust the
frequency to the desired value before welding. (Note:
At higher frequencies the LED flashes very fast and
seems to be continuously ON however it is pulsing.)
If pulsing is turned OFF or if the machine is in Stick
welding mode, the indicator will be OFF.
Q. Pulsing Frequency Control (V160-T Pulse only):
When the pulsing function is ON, this control knob
will adjust the pulsing frequency. The pulsing
frequency adjustment range is 0.2-20Hz or 3-300Hz
depending on the Pulsing Mode Switch position.
R. Pulsing Background Current Control (V160-T Pulse
only): When the pulsing function is ON, this control
knob will adjust the pulsing background current. This
is the current during the low portion of the pulse
waveform; it can be adjusted from 10% to 90% of the
welding current.
S. VRD LED's (enabled on Australian Machines only):
This machine is provided by VRD (Voltage Reduction
Device) function: this reduces the voltage at the
output leads.
The VRD function is enabled by factory default only
on machines that meet the AS 1674.2 Australian
Standards. (C-Tick logo " " on/near the Rating Plate
applied on the machine).
The VRD LED is ON when the Output Voltage is
below 32V with the Machine at idle (no welding time).
For others machines this function is disabled
(the LED is always OFF).
English
TIG Trigger Sequences
TIG welding can be done in either the 2-step or 4-step
mode. The specific sequences of operation for these two
trigger modes are explained below.
2-Step TIG Sequence
With the 2-step trigger mode and a TIG welding mode
selected, the following welding sequence will occur.
1. Press and hold the TIG torch trigger to start the
sequence. The machine will open the gas valve to
start the flow of the shielding gas. After the preflow
time, to purge air from the torch hose, the output of
the machine is turned ON. At this time the arc is
started according to the selected welding mode. After
the arc is started the output current will be increased
at a controlled rate, or upslope time, until the
Welding current is reached.
2. Release the TIG torch trigger to stop welding. The
machine will now decrease the output current at a
controlled rate, or downslope time, until the Crater
current is reached and the output of the machine is
turned OFF.
After the arc is turned OFF, the gas valve will remain
open to continue the flow of the shielding gas to the
hot electrode and work piece.
As shown above, it is possible to press and hold the TIG
torch trigger a second time during downslope to end the
downslope function and maintain the output current at
the Crater current. When the TIG torch trigger is
released the output will turn OFF and the postflow time
will start. This operation, 2-step restart disabled, is the
default setting from the factory.
4-Step Sequence
With the 4-step trigger mode and a TIG welding mode
selected, the following welding sequence will occur.
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English
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