A CLOSER LOOK
WHAT IS NEXTWELD®?
Nextweld integrates Lincoln’s technologies, process- es and products to create a comprehensive, flexible,
provide the foundation for Nextweld innovations like
Waveform Control Technology®
Driving Superior Welding Performance
Lincoln’s Waveform Control Technology controls and shapes the output waveforms
(or weld modes) to adapt to virtually any application, material or weld position. Waveform Control Technology makes it possible to take advantage of Lincoln Nextweld innovations like the STT Process using the STT II.
For more information see Nextweld Document
STT® (Surface Tension Transfer®) is a controlled GMAW short circuit transfer process that uses current controls to adjust the heat independent of wire feed speed, resulting in superior arc perform- ance, good penetration, low heat input control, and reduced spatter and fumes.
For more information see Nextweld
Document
Conventional CV short | STT using CO2 |
circuit transfer using CO2 | and .045” solid wire. |
and .045” solid wire. | Note reduced spatter and fume. |
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The STT Process | A. STT produces a uniform molten ball and maintains it |
| until the "ball' shorts to the puddle. |
B. When the "ball" shorts to the puddle, the current is reduced to a low level allowing the molten ball to wet into the puddle.
C. Automatically, a precision PINCH CURRENT wave form is applied to the short. During this time, special circuitry determines that the short is about to break and reduces the current to avoid the spatter producing "explosion".
D. STT circuitry
A | B C D E | A | E. STT circuitry senses that the arc is | |||
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| automatically applies PEAK CURRENT, which sets the |
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| proper arc length. Following PEAK CURRENT, internal |
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| circuitry automatically switches to the BACKGROUND |
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| CURRENT, which serves as a fine heat control. |
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| Invertec® STT® II |
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| [2] | www.lincolnelectric.com |
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