Lincoln Electric POWER WAVE R450 Operator's Manual page 29

POWER WAVE R450 OPERATION
Most pulse welding programs are synergic. As the wire feed
®
speed is adjusted, the POWER WAVE R450 will automatically
recalculate the waveform parameters to maintain similar arc
properties.
®
The POWER WAVE R450 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 ® R450 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.4
B-7