Miller Syncrowave 350 LX - Balance;Dig Control; Preflow Time Control

OM-356 Page 27
5-9. Balance/DIG Control
1 Balance/DIG Control
Balance Control (AC GTAW):
Control changes the AC output
square wave. Rotating the control
towards 10 provides deeper pene-
tration. Rotating the control towards
0 provides more cleaning action of
the workpiece.
When the control is in the Balanced
position, the wave shape provides
equal penetration and cleaning
action.
Application:
When welding on oxide forming ma-
terials such as aluminum or magne-
sium, excess cleaning is not neces-
sary. To produce a good weld, only
a minimal amount, approximately a
0.10 in (2.5mm) of etched zone
along the weld toes is required.
Set control to 7 and adjust as nec-
essary. Joint configuration, set-up,
process variables, and oxide thick-
ness may affect setting.
Arc rectification can occur when
welding above 200 amps and/or
while welding with helium gas. If this
condition occurs, increasing the
Balance control towards maximum
penetration, may help to restabilize
the arc.
DIG Control (AC And DC SMAW):
When set at 0, short-circuit amper-
age at low arc voltage is the same
as normal welding amperage.
When setting is increased, short-
circuit amperage at low arc voltage
increases.
Application:
Control helps arc starting or making
vertical or overhead welds by in-
creasing amperage at low arc volt-
age, and reduces electrode sticking
while welding.
Ref. S-0795-A
Balanced
3
10
0
More Penetration
More Cleaning
50% Electrode
Positive
50% Electrode
Negative
32% Electrode
Positive
68% Electrode
Negative
55% Electrode
Positive
45% Electrode
Negative
Output Waveforms
Balance Control Examples
ArcSetting
1
1
(CE Nameplate Only)
5-10. Preflow Time Control
1 Preflow Time Control
Use control to set length of time that
gas flows (0−10 seconds) before
arc starts.
Application:
Preflow is used to purge the imme-
diate weld area of atmosphere. Pre-
flow also aids in consistent arc
starting.
1
1
(CE Nameplate Only)