Lincoln Electric 12865 Operator's Manual page 27

VANTAGE ® 549 OPERATION
Most pulse welding programs are synergic. As the wire feed
speed is adjusted, the VANTAGE® 549 will automatically
recalculate the waveform parameters to maintain similar arc
properties.
The VANTAGE® 549 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 VANTAGE® 549 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.15)
FIGURE B.15
UltimArc™ Control +10.0
UltimArc™ Control OFF
UltimArc™ Control -10.0
Hi gh Frequency , Fo cu sed
Low Frequency, Wi de Med ium Fr equency and Wi dth
B-9