TURBINE TECHNOLOGY
the tungsten size required for some applications. While the base metal may require a certain amount of time in EP for adequate cleaning, it may not require the full amperage of the output settings. AC waveshaping options found
in modern inverters further opti- mize arc characteristics. Depending on the waveform selected — advanced squarewave, soft square- wave, sine wave, and triangular wave — users can tailor the arc for such characteristics as a hard, driving arc, a smooth, soft arc with good puddle control and wetting action, or a punch of peak amper- age with minimized overall heat input to reduce distortion.
Summary New inverter technology has
elevated its capabilities to give aircraft welders more control over the entire welding process.
TIG welding is particularly effective on thin materials commonly found in ducting and other air-handling applications.
Precise arc starts and refined arc controls contribute to weld qual- ity and help to reduce weld costs and eliminate scrap. In addition, inverter power source designs are smaller and lighter weight — so they take up less space in the work cell and are easier to move around. They also account for a
much more efficient power draw than older systems. As qual- ity requirements and standards become more stringent in the interest of safety and reliability, TIG inverters present a compel- ling case for those who perform aircraft welding and repair. AMT Brent Williams is a product
manager with Miller Electric Mfg. Co. For more information visit www. MillerWelds.com.
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28 February/March 2012 AviationPros.com/company/10134654 Aircraft Maintenance Technology • www.AviationPros.com • www.AMTSociety.org