TIG Welding Machine

OTC DAIHEN AEP300 / AEP500 Square Wave AC/DC Pulse TIG Welders

The AEP300 and AEP500 are high-performance square wave AC/DC pulse TIG welders from OTC DAIHEN. They support multiple welding modes: square wave AC pulse TIG, square wave AC TIG, TIG arc spot welding, DC pulse TIG, DC stick, DC TIG, and AC stick – all in one machine. Dynamic reactor control ensures stable square wave AC current across the entire range from low to high current, delivering exceptional arc stability. Pulse arc excels in welding dissimilar metals, varying thicknesses, single‑side welding with back formation, various joint types, and gapped workpieces. Precise heat input control significantly reduces thermal distortion, lack of fusion, insufficient penetration, cracks, and porosity. Continuously adjustable arc cleaning width enables beautiful, high‑quality aluminum and magnesium welds. Initial current adjustment, crater treatment, up/down slope functions meet the highest quality demands.

✨ Key Technology Advantages

• Multi‑mode welding — Square wave AC/DC pulse TIG, spot TIG, AC/DC stick, etc.

• Dynamic reactor control — Stable square wave across all currents.

• Excellent pulse arc — Superior performance on dissimilar metals, varying thickness, and gaps.

• Precise heat input control — Reduces defects like distortion, cracks, porosity.

• Adjustable arc cleaning width — High‑quality aluminum/magnesium welds.

• Rich auxiliary functions — Initial current, crater treatment, up/down slope.

• High current options — AEP300 up to 300A, AEP500 up to 500A.

🔧 Primary Applications

Aerospace, rail transportation, automotive manufacturing, pressure vessels, pipe welding, aluminum/magnesium fabrication – where high weld quality is critical.

📊 OTC DAIHEN AEP300 / AEP500 Technical Specifications Comparison