Constant Voltage Welding - Lincoln Electric Power Wave 455M Operator's Manual

B-7
• WELDING MODE
May be selected by name (CV/MIG, CC/Stick Crisp,
Gouge, etc.) or by a mode number (10, 24, 71, etc.)
depending on the Control Box options. Selecting a
welding mode determines the output characteristics of
the Power Wave power source. For a more complete
®
description of the welding modes available in the
Power Wave , see the explanation below.
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• ARC CONTROL
Also known as Inductance or Wave Control. Allows
operator to vary the arc characteristics from "soft" to
"harsh" in all weld modes. It is adjustable from -10.0 to
+10.0, with a nominal setting of 00.0 (The nominal
setting of 00.0 may be displayed as OFF on some
Power Feed wire feeder control panels). See the
®
Welding Mode descriptions, below, for detailed expla-
nations of how the Arc Control affects each 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
automatically adjusts the voltage level corre-
spondingly to maintain similar arc characteristics
throughout the WFS range.
Current
Time
OPERATION
Non Synergic CV:
This type of CV mode behaves more like a
conventional CV power source. Voltage and WFS 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:
Arc Control, often referred to as wave control, adjusts
the inductance of the wave shape. The wave control
adjustment is similar to the "pinch" function in that it is
inversely proportional to inductance. Therefore,
increasing wave control greater than 0.0 results in a
harsher, colder arc while decreasing the wave control
to less than 0.0 provides a softer, hotter arc.
(See Figure B.2)
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FIGURE B.2
CURRENT WAVE FORM (CV)
POWER WAVE 455M
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B-7