b-28 OPERATIONb-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.
OUTPUT CONTROL KNObS (There is no Voltage control when STT welding.)
G MAW-S TT WE L D MODE
MA T E R IA L | G A S | WIR E S IZE | ||
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| 0.035 | 0.045 | 0.052 |
Steel | CO2, Ar/CO2 | 110 | 126 | 126 |
Stainless | Ar/He/CO2 | 110 | 126 | 126 |
(With Hot Start) |
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Steel |
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CO2, Ar/CO2 | 123 | 124 | 124 | |
Stainless | Ar/He/CO2 | 123 | 124 | 124 |
(Synergic STT) |
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Steel | CO2 | 111 | 117 | 120 |
Steel | Ar/CO2 | 112 | 118 | 121 |
Stainless | Ar/He/CO2 | 127 | 129 | |
Stainless |
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Ar/CO2 | 131 | 133 | ||
(Synergic STT, |
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Open Root) |
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Steel |
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CO2 | 113 | 119 | 122 | |
Stainless | Ar/He/CO2 | 135 | 137 | |
200 | ||
WFS | AMPS | VOLTS TRIM |
LESS | MORE |
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DEPOSITION | DEPOSITION | |
START OPTIONS |
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PREFLOW TIME | FUNCTION | |
0 to 10 seconds |
| Adjusts the time the gas flows |
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| after the trigger is pulled and |
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| prior to feeding wire. |
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Off, 50 to150 in/min. | speed from the time the trigger | |
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| is pulled until an arc is estab- |
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| lished. |
Start Procedure |
| The Start Procedure is not |
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| commonly used with STT pro- |
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| cedures. |
ARC CONTROL
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| EFFECT / RANGE |
| DESCRIPTION |
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| PEAK CURRENT |
| Peak Current acts similar to an arc |
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| pinch control. Peak Current sets |
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| the arc length and promotes good |
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| fusion. Higher peak current levels |
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| will cause the arc to broaden |
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| momentarily while increasing arc |
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| length. If set too high, globular |
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| transfer may occur. Setting it too |
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| low may cause instability and wire |
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| stubbing. Best practice is to adjust |
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| for minimum spatter and puddle |
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| agitation. |
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| BACKGROUND CUR- |
| Background Current controls the |
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| RENT |
| overall heat input in the weld. |
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| TAIL OUT |
| Tail out provides additional power |
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| (STT ll MODES ONLY) |
| without the molten droplet becom- |
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| ing too large. Increase as neces- |
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| sary to add heat input without |
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| increasing arc length. Often this |
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| results in faster travel speeds. |
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| Note that as tail out increases, the |
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| peak current and/or background |
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| current may need to be reduced. |
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| WAVEFORM CONTROL TECHNOLOGY |
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| 110 | STEEL | SETUP | |
IR PORT |
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| .035” |
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| STT |
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WELD MODE |
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| START OPTIONS |
ARC CONTROL |
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| END OPTIONS |
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| SET |
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END OPTIONS |
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PARAMETER RANGE |
| FUNCTION | ||
Spot Timer: |
| Adjusts the time welding will continue | ||
0 to 120.0 Seconds |
| even if tigger is still pulled. This option | ||
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| has no effect in | ||
Postflow Time: |
| Adjusts the time that shielding gas | ||
0 to 25.0 seconds |
| flows after the welding output | ||
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| turns off. |
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Crater Procedure |
| Crater Procedure is not commonly | ||
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| used in STT wels procedures. | ||
Burnback: |
| The burnback time is the | ||
0 to .25 Seconds |
| amount of time that the weld | ||
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| output continues after the wire | ||
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| stops feeding. It prevents the | ||
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| wire from sticking in the puddle | ||
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| and prepares the end of the | ||
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| wire for the next arc start. | ||
