Constant Voltage Welding - Lincoln Electric POWER WAVE S350 CE Operator's Manual

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 electrodes. 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, LF45, LF45S or Power Feed 25M wire feeder.
Alternatively an optional Stick / TIG UI (K2828-1) can be
installed into the power source to control these settings
locally.
The TIG mode features continuous control from 5 to
350A with the use of an optional foot amptrol (K870).
The POWER WAVE® S350CE 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
software at the factory.
The nominal preprogrammed voltage is the best average
voltage for a given wire feed speed, but may be adjusted
to preference.
When the wire feed speed changes, the POWER
WAVE® S350CE 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
operator 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
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predicted when all the pulsing waveform parameters are
known. Using a preset voltage becomes impractical 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 vales less than 1.00
decrease the arc length. (See figure below)
1. Trim 0.50: Arc Length Short.
2. Trim 1.00: Arc Length Medium.
3. Trim 1.50: Arc Length Long.
Most pulse welding programs are synergic. As thewire
feed speed is adjusted, the POWER WAVE® S350CE
will automatically recalculate the waveform parameters
to maintain similar arc properties.
The POWER WAVE® S350CE utilizes "adaptive control"
to compensate for changes in the electrical stickout
while welding (Electrical stick-out is the distance from
the contact tip to the work piece).
The POWER WAVE® S350CE waveforms are optimized
for a 19mm stick-out. The adaptive behavior supports a
range of stick-outs from 13 to 32mm. At very low or high
wire feed speeds, the adaptive range may be less due to
reaching physical limitations of the welding process.
UltimArc™ Control adjusts the focus or shape of the arc.
UltimArc™ Control is adjustable from -10.0 to +10.0 with
a nominal setting of 0.0. Increasing the UltimArc™
Control increases the pulse frequency and background
current while decreasing the peak current. This results
in a tight, stiff arc used for high speed sheet metal
welding. Decreasing the UltimArc™ Control decreases
the pulse frequency and background current while
increasing the peak current. This results in a soft arc
good for out of position welding. (See Figure below)
1. UltimArc™ Control -10.0: Low Frequency, Wide.
2. UltimArc™ Control OFF: Medium Frequency and
Width.
3. UltimArc™ Control +10.0: High Frequency,
Focused.
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