TIG orbital welding machine SX322 AVC / OSC

automaticlarge-diameterfor pipes

Overview
The SX322 AVC / OSC is an orbital TIG welding machine built for prefabrication of large-diameter tubes where weld integrity and repeatability are essential. Integrated Arc Voltage Control (AVC) and Oscillation (OSC) provide stable arc conditions, precise electrode positioning and uniform multi-pass welds on thick-wall tubing. The unit is compatible with SAXX power sources and can be reconfigured for orbital cutting or beveling to support workshop prefabrication workflows.

Key data

• Tube OD range: 141–328 mm (5.563–12.750 in)
• Suitable wall thickness: up to 12.7 mm (0.5 in)
• Cooling: Water-cooled
• Functions: Orbital TIG welding with AVC / OSC; rapid changeover for cutting and beveling
• Motorized axial sweep: ±10 mm (0.39 in)
• Electrode diameters: 1.6 mm or 2.4 mm (1/16" or 3/32")

Product advantages

• Consistent arc control using AVC for automated electrode-to-tube distance management
• Controlled OSC for uniform multi-pass weld bead profiles
• Concentric clamping to minimize distortion and ensure alignment
• Stainless steel clamping jaws to protect internal tube surfaces
• Automatic orbital rotation for uniform penetration around the circumference
• Single machine for welding, cutting and beveling with fast mechanical changeover
• Compatible with common steels and exotic alloys

What is AVC/OSC?
Motorized Arc Voltage Control (AVC)
AVC maintains a constant electrode-to-tube distance by adjusting arc voltage automatically during welding, critical for multi-pass orbital TIG processes to prevent contact with the weld pool and ensure repeatable results.

Typical applications

• When OD gauging is not desired: AVC does not require mechanical contact and offers faster, more precise tracking than mechanical rollers.
• When welding with filler wire and deposition rate varies: AVC prevents the torch from contacting the weld pool during multi-pass deposition.

Orbital TIG welding with AVC + OSC + wire
Mechanized multi-pass welding combines AVC, torch oscillation and filler wire feed to fill beveled joints on thick-wall tubes (root, fill, cap) while maintaining consistent fusion and uniform deposition around the joint.

Technical specifications

• Description: SX322 AVC / OSC system
• Part No.: SX322-NAOF
• Diameter range: 141–328 mm (5.563–12.750 in)
• 100% duty cycle: 200 A
• Electrode diameter: 1.6 or 2.4 mm (1/16" or 3/32")
• Cooling: Water-cooled
• Max operating temp.: 40 °C (104 °F)
• Max acoustic emission: < 70 dB
• Unit weight: 74 kg (163 lb)