ADVANCED PROCESS WELDERS Product Number See back for complete specs Input Power Input Current at Rated Output Rated Output Current/Voltage/Duty Cycle Output Range Featuring Surface Tension Transfer® (STT®) The Invertec® STT® II power source combines high frequency inverter technology with advanced Waveform Control Technology® to provide a better welding solution than traditional short ► Controlled penetration and outstanding heat input control - Ideal for welding joints with open root, gaps, or on thin material with no burnthrough. ► Reduced spatter and fumes - Current is controlled to achieve optimal metal ► Various shielding gases - STT® may be used with various gas blends including 100% C02 and Argon or Helium blends. Larger diameter wires can typically be ► Good bead control and faster travel speeds - Can replace TIG (GTAW) in many applications without sacrificing ► Background and Tailout Current - Accurately control fine and coarse heat input for reduced distortion and burnthrough as well as proper Adjustable Hot Start - controls the heat ► Sheet Metal Fabrication ► Pipe Root Pass Welding WHAT'S INCLUDED Publication E4.52 I Issue Date 06/12 © Lincoln Global, Inc. All Rights Reserved. THE LINCOLN ELECTRIC COMPANY 22801 St. Clair Avenue • Cleveland, OH • 44117-1199 • U.S.A.

WHAT IS S77» (SURFACE TENSION TRANSFER1')? 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 performance, good penetration, low heat input control, and reduced spatter and fumes. For more information see Nextweld® Conventional CV short circuit transfer using C02 and STT® using C02 and .045 in. solid wire. .045 In. solid wire. Note reduced spatter and fume. A. STT® produces a uniform molten ball and maintains it until the "ball" shorts to the puddle. B. When...

Using STT® for Open Root welding Open root welding is used for pipe and single-sided plate welding in situations that preclude welding from both sides of the material. This type of welding is common in the petrochemical and process piping industries. Advantages of STT® Open Root Penetration Control - Provides reliable root pass and complete back bead. Ensures excellent sidewall fusion. Cost Reduction - Uses 100% C02, the lowest cost gas, when welding carbon steel. - Provides the capability of welding stainless steel, nickel alloys, and mild or high strength steels without compromising weld quality....

3. Peak Current LED Display 4. Peak Current Control Knob 5. 10 Pin Remote Control for Peak and Background Current 6. 14 Pin Wire Feeder Control with 42V/115V Auxiliary Power 7. Sense Lead Connection, [K940-25, 25 ft. (7.6 m) Sense Lead Kit included] 8. Twist Mate™ Output Connectors 11. Background Current Control Knob 12. Background Current LED Display 13. Wire Mode Switch 14. Wire Diameter Switch 1. Adjust WIRE FEED SPEED to control the deposition rate 3. Dual Procedure Controls 4. Large, Easy To Ready Digital Meters 5. Adjustable Cold Wire Feed 6. Adjust PEAK CURRENT to control the arc length...

SYSTEM SELECTION Bench System Invertec® STT® Il Power Source/STT® 10 Wire Feeder Top wire feeder user interface and added traction with four roll drive system. • Power Source to Feeder Cable (K1758-10) • Drive Roll Kit [KP1505-035S for .035 in. (0.9 mm) wire or • Magnum® PRO Curve™ 200 Ready-Pak®, 15 ft. (3 m), .035-.045 (0.9-1.1 mm) wire diameter with K466-10 Gun ^^^S STF-10 Wire Feeder • Work Cable and Work Clamp • Optional K940 Sense Leads Portable System Invertec® STT® II Power Source/LN-25 PRO Dual Power Wire Feeder Rugged enclosed feeder - a great system for construction or shipbuilding....

RECOMMENDED ACCESSORIES GENERAL OPTIONS Weld Fume Control Solutions Lincoln Electric offers a wide variety of weld fume control solutions, ranging from portable systems easily wheeled around the shop to shop-wide central systems servicing many dedicated welding stations. Inverter and Wire Feeder Cart Rear-wheeled cart Includes front casters and no-lift gas bottle platform. Convenient handles allow for easy cable storage while full length side trays store parts and tools. Shipped fully assembled. Small footprint fits through 30 inch door. Permits slde-by-side mounting of two full size gas cylinders,...