Welding aluminum and its alloys requires not only power, but above all precision and control over AC arc parameters. The TELWIN SUPERIOR TIG 422 AC/DC rises to the challenge, offering advanced AC Frequency control from 20-200 Hz. The higher frequency allows for a more focused and stable arc, resulting in a narrower heat affected zone, deeper penetration and faster welding speed. This is crucial when joining thinner parts and where maximum precision is required.

In addition, the welder allows precise control of the AC wave balance (AC Balance) in the range of 20-60%. The balance adjustment determines the ratio of the duration of the positive half-wave (responsible for cleaning and removing oxides from the aluminum surface) to the negative half-wave (ensuring penetration and fusion). Optimal balance setting is key to achieving a clean, smooth weld free of porosity and inclusions, while ensuring proper remelting depth and minimizing tungsten electrode wear. With these features, even complex welding tasks on aluminum become easier to perform, and the results are reproducible and consistent with the highest quality standards.

TELWIN SUPERIOR TIG 422 AC/DC takes pulse welding to a new level of sophistication. The TIG PULS function (for both DC and AC) allows for precise modulation of the welding current between peak and base. This feature is invaluable for welding thin materials (minimizing the risk of burn-through and distortion), overheat-sensitive materials (such as duplex stainless steels or nickel alloys) and welding in forced positions where control of the weld pool is critical.

The device offers various pulse modes, including EASY PULSE, which automatically selects the optimal pulse parameters based on the set welding current, greatly simplifying setup and allowing even less experienced welders to achieve excellent results. For advanced users, full adjustments are available for pulse frequency, fill factor, and base and peak current values. Benefits of advanced pulsation include better control of line energy, narrower and more aesthetically pleasing welds, reduced heat affected zone, deeper fusion with less heat input, and the ability to weld materials of varying thicknesses. SYN PULSE (Synergic Pulse) further simplifies operation by automatically adjusting the pulse parameters depending on the set peak current, ensuring optimal welding conditions.

The TELWIN SUPERIOR TIG 422 AC/DC is designed for daily, intensive work in industrial environments. Its high duty cycle (400A @ 40% for TIG, 350A @ 35% for MMA) ensures that it can weld at high currents for long periods of time without overheating. The designation “”+ACC.“” in the model name often indicates the inclusion of a professional liquid cooler for the TIG handle, which is essential when welding with high currents and ensures comfortable operation and longer life of the handle’s consumable parts.

The device also offers full-fledged MMA welding with covered electrodes (rutile, alkaline, cellulose, stainless steel, cast iron) up to 6 mm in diameter. Features such as Arc Force (dynamic short-circuit current control), Hot Start (facilitated electrode ignition) and Anti-Stick (prevention of electrode sticking) significantly simplify work and improve the quality of MMA welds. An intuitive digital control panel with an easy-to-read display and the ability to save 9 individual welding programs (JOBs) allows you to quickly recall the optimal settings for repetitive tasks, saving time and guaranteeing repeatable results. The rugged metal housing and high IP23 protection ensure resistance to harsh workshop conditions.