0461232882 - ESAB A6TF Mastertrac Tandem SAW Tractor with PEK Controller

High-Performance Tandem Submerged Arc Welding Solution

The ESAB A6TF Mastertrac Tandem PEK is a premier automatic welding solution designed for the most demanding heavy industrial applications. Engineered for the Submerged Arc Welding (SAW) process, this self-propelled tractor unit features a tandem head configuration, allowing for the simultaneous use of two welding wires. This setup is critical for industries such as shipbuilding, bridge construction, and beam fabrication where long, continuous welds on thick materials are standard. By utilizing a tandem arc—typically a DC lead arc for penetration and an AC trail arc for capping—the A6TF achieves superior deposition rates and travel speeds that single-wire systems cannot match.

At the heart of the system is the PEK Process Controller. This advanced digital interface provides the operator with complete control over the welding procedure. It allows for the presetting of all critical parameters, including voltage, amperage, and travel speed, ensuring repeatability and adherence to strict welding procedure specifications (WPS). The controller supports data storage for multiple weld schedules, making it easy to switch between different job requirements without manual recalibration. The PEK unit communicates directly with the power sources to maintain a stable arc and consistent heat input throughout the weld length.

The tractor itself is built on a rugged 4-wheel drive chassis, designed to provide stable and consistent movement even on inclined surfaces or uneven plates. The A6 welding heads are renowned for their durability and modularity, allowing for easy maintenance and adaptation. The system includes heavy-duty wire straighteners and a flux recovery system compatibility to ensure efficient operation. The A6TF Mastertrac is optimized for use with ESAB’s range of heavy-duty power sources, such as the LAF series (DC) and TAF series (AC), providing the robust power delivery necessary for high-amperage tandem welding.

Technical specifications include a wide range of wire diameter capabilities, typically handling wires from 3.0mm up to 6.0mm in single configurations, or optimized smaller diameters for the tandem setup. The feedback systems integrated into the drive motors ensure that the travel speed remains constant regardless of load variations, resulting in uniform bead profiles and high-integrity weldments.