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b-28
MACHINE FUNCTIONALITY bY WELD PROCESS
STT AND STT II (NONN-SYNERGIC)
Use the following tables to review how the machine functions (output controls, arc control, Start options and weld
options) for the weld modes listed in the top table.
G MA W-S T T WE L D MODE
MA T E R IA L
G A S
Steel
CO
Ar/CO
2,
Stainless
Ar/He/CO
(With Hot Start)
Steel
CO
Ar/CO
2,
Stainless
Ar/He/CO
(Synergic STT)
Steel
CO
2
Ar/CO
Steel
Stainless
Ar/He/CO
Stainless
Ar/CO
(Synergic STT,
Open Root)
Steel
CO
2
Stainless
Ar/He/CO
Ar/CO
G MA W-S T T WE L D MODE
G A S
Steel
MA T E R IA L
CO
126
126
110
0.035 0.045 0.052
WIR E S IZE
2,
Ar/CO
2,
CO
Ar/He/CO
Ar/He/CO
Ar/CO
2
CO
2
(Synergic STT,
Ar/CO
Ar/He/CO
Stainless
Stainless
Steel
(With Hot Start)
Stainless
Steel
Steel
Stainless
2
Open Root)
(Synergic STT)
2
126
127
-----
131
-----
118
120
121
111
112
124
117
124
124
123
123
2
124
2
126
2
2
129
110
133
Steel
Stainless
2
CO
Ar/He/CO
2
135
113
122
-----
137
119
ARC CONTROL
EFFECT / RANGE
PEAK CURRENT
Peak Current acts similar to an arc
pinch control. Peak Current sets
the arc length and promotes good
fusion. Higher peak current levels
will cause the arc to broaden
momentarily while increasing arc
length. If set too high, globular
transfer may occur. Setting it too
low may cause instability and wire
stubbing. Best practice is to adjust
for minimum spatter and puddle
agitation.
BACKGROUND CUR-
Background Current controls the
RENT
overall heat input in the weld.
TAIL OUT
Tail out provides additional power
(STT ll MODES ONLY)
without the molten droplet becom-
ing too large. Increase as neces-
sary to add heat input without
increasing arc length. Often this
results in faster travel speeds.
Note that as tail out increases, the
peak current and/or background
current may need to be reduced.
OPERATION
OUTPUT CONTROL KNObS (There is no Voltage control when STT welding.)
WIR E S IZE
0.035 0.045 0.052
110
126
126
2
110
126
126
2
123
124
124
2
123
124
124
2
111
117
120
112
118
121
2
127
129
-----
2
131
133
-----
2
113
119
122
135
137
-----
2
DESCRIPTION
POWER FEED™ 10M SINGLE WIRE FEEDER
200
WFS
AMPS
LESS
MORE
DEPOSITION
DEPOSITION
START OPTIONS
PREFLOW TIME
0 to 10 seconds
Adjusts the time the gas flows
after the trigger is pulled and
prior to feeding wire.
RUN-IN WFS:
Run-in sets the wire feed
Off, 50 to150 in/min.
speed from the time the trigger
is pulled until an arc is estab-
lished.
Start Procedure
The Start Procedure is not
commonly used with STT pro-
cedures.
WAVEFORM CONTROL TECHNOLOGY
110
200
----
DEPOSITION
DEPOSITION
WFS AMPS
LESS
MORE
VOLTS
TRIM
IR PORT
WELD MODE
ARC CONTROL
IR PORT
SETUP
.035"
STEEL
STT
WAVEFORM CONTROL TECHNOLOGY
110
WELD MODE
ARC CONTROL
END OPTIONS
START OPTIONS
SET
END OPTIONS
PARAMETER RANGE
Spot Timer:
0 to 120.0 Seconds
Postflow Time:
0 to 25.0 seconds
Crater Procedure
Burnback:
0 to .25 Seconds
----
VOLTS
TRIM
FUNCTION
STEEL
.035"
SETUP
STT
START OPTIONS
END OPTIONS
SET
FUNCTION
Adjusts the time welding will continue
even if tigger is still pulled. This option
has no effect in 4-Step Trigger Mode.
Adjusts the time that shielding gas
flows after the welding output
turns off.
Crater Procedure is not commonly
used in STT wels procedures.
The burnback time is the
amount of time that the weld
output continues after the wire
stops feeding. It prevents the
wire from sticking in the puddle
and prepares the end of the
wire for the next arc start.
b-28
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