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The AIR VANTAGE® 500 CUMMINS can be used in a
wide variety of DC TIG welding applications.
The TOUCH START TIG setting of the MODE switch
is for DC TIG (Tungsten Inert Gas) welding. To initiate
a weld, the OUTPUT CONTROL knob is first set 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 gen-
eral, avoids tungsten contamination. Then, the tung-
sten 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 approxi-
mately 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.
The ARC CONTROL is not active in the TIG mode.
In general the ‘Touch Start’ feature avoids tungsten
contamination without the use of a Hi-frequency unit.
If the use of a high frequency generator is desired, the
K930-2 TIG Module can be used with the AIR VAN-
TAGE® 500 CUMMINS. The settings are for refer-
ence.
The AIR VANTAGE® 500 CUMMINS is equipped with
the required R.F. bypass circuitry for the connection of
high frequency generating equipment.
The AIR VANTAGE® 500 CUMMINS and any high
frequency generating equipment must be properly
grounded. See the K930-2 TIG Module operating
manuals for complete instructions on installation,
operation, and maintenance.
When using the TIG Module, the OUTPUT control on
the AIR VANTAGE® 500 CUMMINS is used to set the
maximum range of the CURRENT CONTROL on the
TIG Module or an Amptrol if connected to the TIG
Module.
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• Set the WELD MODE switch to the “Touch Start Tig 20-
250 Setting”.
• Set the IDLER switch to the “AUTO” position.
• Set the WELDING TERMINALS switch to the “Remotely
Controlled” position. This will keep the solid state contactor
open and provide a “cold” electrode until the triggering
device (Amptrol or Arc Start Switch) is presse
d.
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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.
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The AIR VANTAGE® 500 CUMMINS can be used with a
broad range of DC stick electrodes. The MODE switch
provides two stick welding settings as follows:
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The CC-STICK position of the MODE switch is
designed for horizontal, vertical-up and over head
welding with all types of electrodes, especially low
hydrogen. The OUTPUT CONTROL knob adjusts the
full output range for stick welding.
The ARC CONTROL knob sets the short circuit (arc-
force) current during stick welding. Increasing the
number from -10(Soft) to +10(Crisp) increases the
short circuit current and prevents sticking of the elec-
trode to the plate while welding. This can also
increase spatter. It is recommended that the ARC
CONTROL be set to the minimum number without
electrode sticking. Start with the knob set at 0.
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This slope controlled setting is intended for “out-of-
position” and “down hill” pipe welding where the oper-
ator would like to control the current level by changing
the arc length. The OUTPUT CONTROL knob adjusts
the full output range for pipe welding.
The ARC CONTROL knob sets the short circuit cur-
rent (arc-force) during stick welding to adjust for a soft
or a more forceful digging arc (Crisp). Increasing the
number from -10(Soft) to +10(Crisp) increases the
short circuit current which results in a more forceful
digging arc. Typically a forceful digging arc is pre-
ferred for root and hot passes. A softer arc is pre-
ferred for fill and cap passes where weld puddle con-
trol and deposition (“stacking” of iron) are key to fast
travel speeds. It is recommended that the ARC CON-
TROL be set initially at 0.
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