The Complete Guide to Setting Up Your Fronius iWave 230i for Perfect TIG Welds

The Fronius iWave 230i AC/DC is one of the most advanced TIG welding machines available today. Whether you’re welding mild steel, stainless steel, aluminium or exotic alloys, the iWave offers exceptional arc stability, intuitive controls and an impressive range of advanced welding functions.

If you’ve just purchased an iWave 230i or want to get the very best performance from it, this guide will walk you through every step of the setup process.

What You’ll Need

Before you begin, you’ll need:

Fronius iWave 230i AC/DC
TIG Torch (TTW3000 or equivalent)
Pure Tungsten or Lanthanated Tungsten (depending on application)
Earth Lead
Argon Gas
Flow Meter
Appropriate filler wire
Ceramic cup or Gas Lens

What Can the iWave 230i Weld?

The iWave is capable of welding:

Mild Steel
Stainless Steel
Aluminium
Titanium
Copper Alloys
Inconel
Duplex Stainless
Super Duplex
Nickel Alloys

making it one of the most versatile AC/DC TIG welders available.

Step 1 – Connect the Torch

For standard TIG welding:

Torch → Negative (-)
Earth Lead → Positive (+)

Ensure all DINSE connections are tight before welding.

Step 2 – Connect the Argon Gas

Use:

100% Pure Argon

Recommended flow rates:

Cup Size

Gas Flow

No.5 – 6–8 L/min

No.6 – 7–9 L/min

No.7 – 8–10 L/min

No.8 – 9–12 L/min

Gas Lens with larger cups – 12+ L/min

If welding outside, increase flow slightly while avoiding excessive gas turbulence.

Step 3 – Select the Welding Process

Using the front control panel select:

DC TIG (Steel & Stainless)
or
AC TIG (Aluminium)

The iWave will automatically load the correct parameter set for your chosen process.

Step 4 – Select Your Welding Mode

The iWave offers several welding modes:

2T
4T
Spot TIG
Pulse TIG
Cycle TIG
TAC (Tack Function)

For most workshop fabrication:

2T is recommended.

For longer welds:

4T reduces operator fatigue.

Step 5 – Enable Reverse Polarity Ignition (Highly Recommended)

One of the best features on the Fronius iWave—and one that many users overlook—is Reverse Polarity Ignition.

Why Enable It?

When enabled, the machine briefly uses reverse polarity during HF ignition before switching to the normal welding polarity.

The benefits are immediately noticeable:

Exceptionally crisp arc starts.
More reliable HF ignition.
Reduced tungsten contamination during ignition.
Improved consistency, particularly on stainless steel.
Excellent performance on aluminium.

If you’re looking for professional-quality TIG arc starts every time, this is one setting well worth enabling.

WeldAssist Pro Tip: Reverse Polarity Ignition is one of the first settings we enable on demonstration machines because it produces consistently clean, precise arc starts with very little effort.

Step 6 – Set the Welding Current

A reliable starting point is:

20–30 amps per millimetre of material thickness

Use the lower end of the range for:

Tight-fitting joints
Outside corner welds
Thin stainless steel
Slow, controlled travel
Good heat control

Use the higher end for:

Fillet welds
Lap joints
Heavier aluminium sections
Faster travel speeds
Joints that require greater penetration

Recommended Starting Current

Material Thickness

Suggested Current Range

0.8 mm – 16–24 A

1.0 mm – 20–30 A

1.5 mm – 30–45 A

2.0 mm – 40–60 A

3.0 mm – 60–90 A

4.0 mm – 80–120 A

5.0 mm – 100–150 A

6.0 mm – 120–180 A

8.0 mm – 160–230 A

These figures should be treated as starting points, not fixed settings. The actual current required will depend on the material, joint geometry, welding position and how quickly the operator travels.

For aluminium, you may need to work towards the upper end of the range because aluminium conducts heat away from the weld area rapidly. Thin stainless steel will often require the lower end to avoid distortion and excessive heat tint.

Using a Foot Pedal or Remote Current Control

When using a foot pedal, set the machine’s maximum current slightly above the expected requirement. This gives enough reserve to establish the weld pool quickly while allowing the operator to reduce the current as heat builds in the workpiece.

For example, when welding 3 mm stainless steel, you might set the maximum current to around 80–90 A, then control the actual output with the pedal during the weld.

WeldAssist Pro Tip: The current shown on the machine is the maximum available current when using a foot pedal. You do not need to weld continuously at that value. Use enough current to establish the pool promptly, then back off as the material heats up.

Step 7 – Set Pre-Gas & Post-Gas

Recommended starting values:

Pre-Gas

0.2–0.5 seconds

This protects the tungsten before ignition.

Current – Post Gas

Up to 80 A – 5–6 sec

120 A – 7–8 sec

180 A – 9–10 sec

230 A – 10–12 sec

Never remove the torch before the post-gas has finished.

Step 8 – AC Settings for Aluminium

For aluminium:

AC Balance

Start around:

70% EN / 30% EP

More EP:

Increased cleaning action.

More EN:

Greater penetration.

AC Frequency

Suggested starting points:

Thin Aluminium

100–120 Hz

General Fabrication

80–100 Hz

Heavy Sections

50–70 Hz

Higher frequencies produce a tighter, more focused arc.

Step 9 – Pulse TIG

Pulse TIG is ideal for:

Thin stainless
Titanium
Sheet aluminium
Cosmetic welds

Suggested starting point:

Pulse Frequency: 1–2 Hz
Peak Current: 100%
Background Current: 30–40%

Higher pulse frequencies can improve arc focus and reduce heat input.

Step 10 – CycleTIG

CycleTIG is unique to Fronius.

It automatically alternates between two current levels without requiring the welder to manually pulse the torch.

Ideal for:

Thin stainless steel
Food-grade fabrication
Pipe welding
Heat-sensitive materials
Titanium welding

Step 11 – TAC (Tack Function)

The TAC function creates quick, strong tack welds by momentarily pulsing the current.

Benefits:

Fast alignment.
Reduced distortion.
Minimal heat input.
Excellent fit-up for stainless and aluminium.

Recommended Tungsten Selection

Material Tungsten

Mild Steel – 2% Lanthanated (Blue)

Stainless Steel – 2% Lanthanated

Aluminium – 2% Lanthanated

Titanium – 2% Lanthanated

Diameter Guide:

1.6 mm → Up to 120 A
2.4 mm → 80–220 A
3.2 mm → 180 A+

Recommended Cup Sizes

General Mild Steel Fabrication:

No.7 Ceramic cup

Precision stainless steel TIG:

No.10/12 Furick Gas Lens Cup

Heavy Aluminium:

No.8 Collet Body Ceramic Cup

Common Problems & Solutions

Arc Wanders

Regrind the tungsten.
Check gas flow.
Ensure the tungsten is centred.

Tungsten Contamination

Increase post-gas.
Avoid touching the weld pool.
Check Reverse Polarity Ignition is enabled.

Porosity

Check for gas leaks.
Increase gas coverage.
Clean the parent material thoroughly.

Poor Arc Starts

Check HF ignition settings.
Confirm the work clamp has a clean connection.
Enable Reverse Polarity Ignition.
Inspect the tungsten for contamination or incorrect grinding.

My Favourite Everyday Setup

For most mild steel and stainless fabrication:

DC TIG
2T Mode
2.4 mm Gold or Blue Tungsten
No.12 Furick Gas Lens ceramic cup
100% Argon
10-12 L/min Gas Flow
Reverse Polarity Ignition: Enabled
Pre-Gas: 0.3 sec
Post-Gas: 5 sec

This setup delivers reliable arc starts, excellent gas coverage and consistent weld quality across a wide range of fabrication work.

WeldAssist Pro Tip

Don’t get overwhelmed by the iWave’s extensive feature set. Begin with the synergic and default welding parameters, then adjust only one setting at a time. The biggest improvements usually come from optimising your tungsten preparation, shielding gas coverage and enabling Reverse Polarity Ignition for consistently crisp, repeatable arc starts.

Related WeldAssist Guides

Pulse TIG Welding Explained
AC Balance Explained
How to Choose the Correct Tungsten
TIG Gas Lens vs Standard Collet Body
TIG Tungsten Contamination Explained
Fronius CycleTIG Explained
TIG Welding Aluminium – Complete Setup Guide

Fronius iWave 230i AC/DC TIG Setup Guide