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POWER WAVE E500
CONSTANT VOLTAGE WELDING
Synergic CV
For each wire feed speed, a corresponding voltage is prepro-
grammed 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 E500
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 charac-
teristics, 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
predicted when all the pulsing waveform parameters are known.
Voltage or Trim can be adjusted.
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)
Most pulse welding programs are synergic. As the wire feed
speed is adjusted, the POWER WAVE E500 will automatically
recalculate the waveform parameters to maintain similar arc
properties.
The POWER WAVE E500 utilizes "adaptive control" to
compensate for changes in the electrical stick-out while welding.
(Electrical stick-out is the distance from the contact tip to the work
piece.) The POWER WAVE E500 waveforms are optimized for a
0.75" stick-out. The adaptive behavior supports a range of stick-
outs from 0.50 to 1.25". 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 B.4)
FIGURE B.3
FIGURE B.4
B-4
OPERATION
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