TIG AC welding of aluminum requires extreme precision and control of arc parameters, and the TELWIN SUPERTIG 302 AC/DC provides the tools to meet these challenges. Central to this is the AC current balance control, which allows precise adjustment of the ratio between the positive half-wave (responsible for cleaning oxides from the aluminum surface) and the negative half-wave (for deeper fusion). This allows the welder to achieve a perfectly clean weld without impurities, while controlling penetration and minimizing the risk of underfusion or lack of fusion.

Another important parameter is the AC current frequency control. Higher frequencies (up to 200 Hz or more, depending on the exact specifications of this model) allow for a more concentrated and stable arc, resulting in a narrower weld, a smaller heat affected zone and better control of the weld pool, especially when welding thin aluminum sheets and in corners. The ability to adjust these parameters makes the SUPERTIG 302 an ideal tool for welding bicycle frames, tanks, auto body parts, aluminum structures and many other applications requiring the highest quality connections.

The TIG pulse welding function of the SUPERTIG 302 AC/DC is a real game-changer for professionals working with stainless steel, thin sheet metal and deformation-sensitive materials. The advanced pulse mode offers full control over parameters such as pulse frequency, pulse balance (duration of peak current relative to base current), and peak and base current values. This allows for precise metering of the heat energy introduced into the material.

Thanks to pulsation, the welder can create highly aesthetic welds with a distinctive “fish-like” pattern, while minimizing the amount of heat input. This results in a significant reduction in material distortion, which is crucial when welding thin parts, such as in the food and pharmaceutical industries or when producing decorative stainless steel parts. In addition, pulsation improves control of the weld pool in difficult positions, facilitates full fusion in single-sided welding, and helps keep the weld clean by reducing the risk of overheating and oxidation. The “Easy Puls” function further simplifies settings for less experienced users by automatically selecting the optimal parameters.

The TELWIN SUPERTIG 302 AC/DC is designed for intensive use in demanding industrial environments. The rugged metal housing protects internal components from mechanical damage, and the IP23 rating provides dust and splash resistance. The device is equipped with numerous protections, including thermal, overvoltage, undervoltage and overload protection, which guarantees safe operation and a long service life of the welder.

For optimum working conditions when welding with high currents, the SUPERTIG 302 is adapted for use with a liquid cooling module (e.g. Telwin G.R.A.). This allows the use of lighter and more ergonomic liquid-cooled TIG grips, which significantly increases welder comfort during prolonged tasks, reducing fatigue and increasing precision. An intuitive control panel with digital displays and easy-to-read pictograms allows quick access to all functions and their precise setting, minimizing setup time and allowing you to focus on the welding process itself, maximizing efficiency and productivity.