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B-6
OPERATION
B-6
SMAW (STICK) WELDING
The welding current and Arc Force settings can be set
through a Power Feed 10M or Power Feed 25M wire
feeder. Alternatively an optional Stick / TIG UI can be
installed into the power source to control these set-
tings locally.
In a SMAW (STICK mode), Arc Force can be adjust-
ed. It can be set to the lower range for a soft and less
penetrating arc characteristic (negative numeric val-
ues) or to the higher range (positive numeric values)
for a crisp and more penetrating arc. Normally, when
welding with cellulosic types of electrodes (E6010,
E7010, E6011), a higher energy arc is required to
maintain arc stability. This is usually indicated when
the electrode sticks to the work-piece or when the arc
becomes unstable during manipulative technique. For
low hydrogen types of electrodes (E7018, E8018,
E9018, etc.) a softer arc is usually desirable and the
lower end of the Arc Control suits these types of elec-
trodes. In either case the arc control is available to
increase or decrease the energy level delivered to the
arc.
GTAW (TIG) WELDING
The welding current can be set through a Power Feed
10M or Power Feed 25M wire feeder. Alternatively an
optional Stick / TIG UI can be installed into the power
source to control these settings locally.
The TIG mode features continuous control from 5 to
350 amps with the use of an optional foot amptrol.
The Power Wave® S350 can be run in either a Touch
Start TIG mode or Scratch start TIG mode.
CONSTANT VOLTAGE WELDING
Synergic CV
For each wire feed speed, a corresponding voltage is
preprogrammed into the machine through special soft-
ware at the factory.
The nominal preprogrammed voltage is the best aver-
age voltage for a given wire feed speed, but may be
adjusted to preference. When the wire feed speed
changes, the Power Wave® S350 automatically
adjusts the voltage level correspondingly to maintain
similar arc characteristics throughout the WFS range.
Non Synergic CV
In non-synergic modes, the WFS control behaves
more like a conventional CV power source where
WFS and voltage are independent adjustments.
Therefore to maintain the arc characteristics, the oper-
ator must adjust the voltage to compensate for any
changes made to the WFS.
All CV Modes
Pinch adjusts the apparent inductance of the wave
shape. The “pinch” function is inversely proportional
to inductance. Therefore, increasing Pinch Control
greater than 0.0 results in a crisper arc (more spatter)
while decreasing the Pinch Control to less than 0.0
provides a softer arc (less spatter).
PULSE WELDING
Pulse welding procedures are set by controlling an
overall “arc length” variable. When pulse welding, the
arc voltage is highly dependent upon the waveform.
The peak current, back ground current, rise time, fall
time and pulse frequency all affect the voltage. The
exact voltage for a given wire feed speed can only be
predicted when all the pulsing waveform parameters
are known. Using a preset voltage becomes impracti-
cal and instead the arc length is set by adjusting
“trim”.
Trim adjusts the arc length and ranges from 0.50 to
1.50 with a nominal value of 1.00. Trim values greater
than 1.00 increase the arc length, while values less
than 1.00 decrease the arc length. (See figure B.3)
POWER WAVE® S350
Trim .50
Arc Length Short
Trim 1.00
Arc Length Medium
Trim 1.50
Arc Length Long
FIGURE B.3