Lincoln Electric POWER FEED SVM185-A - Manual (Page 34)

OPERATION B-16 B-16
POWER FEED® 25M
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ALUMINUM SYNERGIC GMAW-P (PULSED
MIG)AND GMAW-PP (PULSE ON PULSE)
WELDING
The POWER FEED® 25M and Power Wave welding
power source combine to readily produce top quality
aluminum welds with excellent appearance, little spat-
ter and good bead shape. Push-pull guns are available
for consistent feeding when welding a long distance
away from the wire feeder.
Pulse-on-Pulse Welding
The POWER FEED® system offers both traditional
pulse and Pulse-on-Pulse™. Pulse-on-Pulse (GMAW-
PP) is an exclusive waveform for aluminum welding.
Use it to make welds with a "stacked dime" appear-
ance, similar to GTAW welds.
FIGURE B.9
The pulsing frequency is adjustable. Changing the fre-
quency modulation (or arc control) of the waveform
changes the ripple spacing. Faster travel speeds may
be achieved by using higher values of frequency mod-
ulation.
FIGURE B.10
Frequency Modulation = -10
Wide weld and ripple spacing, slow travel speed.
Frequency Modulation = 10
Narrow weld and ripple spacing, fast travel speed.
FIGURE B.11