This is a demonstration unit of the Expert TIG 320 AC/DC welder with an 8 m remote-control TIG torch. The IGBT inverter power source runs on 3 x 400 V mains and has a cooler. You use it for TIG and TIG Pulse with alternating (AC) and direct (DC) current, and for coated electrode welding (MMA), at 10 to 320 A. AC is for aluminium, its alloys and brass, DC for stainless, carbon and low-alloy steel, copper and titanium.
Specifications
- Power supply: 3 x 400 V, without plug
- Mains protection: C20A (TIG), C25A (MMA)
- Mains current draw (60% / max.): MMA 24 A (31 A), TIG 17 A (23 A)
- Power: 11.5 kW (TIG), 16 kW (MMA)
- Welding current range: 10 to 320 A
- Duty cycle: 320 A at 60%, 250 A at 100%
- Open-circuit voltage: 61 V
- Start, base and end current: 10 to 320 A
- Current rise and fall: 0 to 10 s
- Gas pre-flow: 0.1 to 2 s, gas post-flow: 0 to 10 s
- Pulse: 0.5 to 999 Hz, width 5 to 95%
- AC: frequency 50 to 250 Hz, balance from -5 to +5%
- MMA electrode: 1.6 to 6.0 mm
- Weight: machine 31 kg, set 90 kg
Features
TIG modes
You have TIG DC, TIG DC Pulse, TIG AC and TIG AC Pulse. Pulse adjustment changes the weld shape and how focused the arc is, and less heat goes into the material, which helps on thin parts. TIG spot is used for tacking thin materials.
2-LEVEL, 2T and 4T
In 2-LEVEL mode, each further press of the torch trigger switches between the higher and the lower current level. The trigger also works in 2T, or in 4T with latch for long welds. 2T and 4T work with both HF and LIFT ignition.
HF or LIFT ignition
You strike the arc without contact (HF) or by contact (LIFT). Choose LIFT where electromagnetic interference from HF could affect the surroundings.
Panel and programs
On the digital panel you set gas pre-flow and post-flow, start, welding, base and end current, rise and fall times, pulse, AC balance and frequency, and HOT START and ARC FORCE. You choose the AC waveform as triangular, square or sine. You can save your settings in 9 user programs.
MMA and construction
In MMA you have ARC FORCE, HOT START and ANTI STICK, which switches off the voltage when the electrode sticks. The cooler protects the torch from overheating, you connect the gas quick coupler without tools, and overload protection guards the power source.
In the box
- TIG torch with remote control, 8 m
- Earth cable, 3 m
- Trolley
- Cooler
This is a demonstration unit, so confirm its condition and completeness before you order. 12-month warranty.
