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C-12
ACCESSORIES
C-12
Mode Schedule - Table on the front of the option
used by the operator to correlate the displayed mode
number to an actual power source mode.
Due to the nature of the system, the following feature
is required for safety reasons. Upon entering any
constant current (CC) mode, the right encoder,
labeled VOLTS, TRIM, on the Display/Control Panel
acts as a “soft” contactor switch. The encoder knob
must be turned CW at least 45° to activate the output
(turning CCW 45° deactivates the output). This pre-
vents the output from inadvertently becoming “hot”
when scrolling through the weld modes. The excep-
tion to this rule is when the weld mode is entered by
a change in procedure (using a memory panel such
as the K1542-9 Memory/Dual Procedure panel). In
this case, the state of the contactor is recalled as it
was left when the procedure was exited.
In the CC modes, the output current is set by the
AMPS control, and the VOLTS/TRIM adjustment has
no effect in this mode. In this mode, the ARC
CONTROL adjusts the arc force. Increasing the ARC
CONTROL setting increases the arc force, making
the arc more harsh but less likely to stick. Decreasing
the ARC CONTROL setting decreases the arc force,
making the arc softer and smoother.
Parameter Selection
The PARAMETER SELECT switch is a momentary
large three position toggle switch that defaults to the
center (off) position. Moving the switch up advances
the parameter indicator in the upward direction, down
advances it in the downward direction. Holding the
switch in either direction will result in the indicator
advancing at a high rate of speed in that direction,
until the switch is released. When the indicator
reaches its upper or lower limit, advancing ceases
until the direction of the switch is changed.
Parameter Adjustment
The value of the active parameter, as defined by the
parameter indicator, is displayed on the parameter
display. The PARAMETER SET switch is a momen-
tary large three position toggle switch that defaults to
the center (off) position. Moving the switch up
advances the displayed value in the positive direc-
tion, down advances it in the negative direction.
Holding the switch in either direction will result in the
displayed value advancing at a high rate of speed in
that direction, until the switch is released. When the
indicator reaches its upper or lower limit, advancing
ceases until the direction of the switch is changed.
GMAW Pulse Procedures
In these procedures, the actual voltage greatly
depends on the waveform used. The peak currents,
background currents, rise times, fall times, and pulse
times all affect the actual voltage. The actual voltage
for a given wire feed speed is not directly predictable
unless the waveform is known. In this case, it is not
practical to preset an actual voltage for the proce-
dure. Instead, an arc length adjustment is provided.
The machine “knows” what the best arc length is at
the given wire feed speed but allows the operator to
change it.
The arc length trim (usually referred to simply as
“trim”) can be adjusted between 0.500 and 1.500 on
the Control Box’s VOLTS/TRIM display. A trim of
1.000 means that no adjustments will be made to the
preset arc lengths. A trim setting less than 1.000
decreases the preset arc lengths. The arc length trim
adjustment is factored in at all wire feed speed set-
tings. Increasing the trim by 10 percent at a given
wire feed speed also increases all the other arc
length trim settings of the procedure by 10 percent.
Lincoln Power Wave power sources utilizes a control
scheme known as adaptive control in all pulse
modes. Because the Power Wave utilizes adaptive
control, it can adjust the pulsing parameters based
on changes in the arc due to changes in the electrical
sitckout of the electrode. (Electrical stickout is the
distance from the contact to the workpiece.) The
Power Wave is optimized for use with a 0.75 in. stick-
out. The adaptive behavior is programmed to support
a stickout range from 0.5 in. to 1.25 in. In the low and
high end of the wire feed speed ranges of most
processes, the adaptive behavior may be restricted.
This is a physical restriction due to reaching the edge
of the operating range for the process.
The ARC CONTROL adjustment allows the pulse fre-
quency to be varied. Increasing the ARC CONTROL
causes the frequency setting to increase, while
decreasing the ARC CONTROL causes the frequen-
cy to decrease. Varying the ARC CONTROL, and
hence, the pulse frequency, affects the droplet trans-
fer and allows fine-tuning for different welding
positions.
POWER WAVE 455/POWER FEED 10
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