Maxstar 400 - TIG/Stick Welding Power Source - Industrial Applications

Oct 28, 2026

Maxstar 400 TIG/Stick welding power source for industrial applications including precision fabrication, tube mill work, pipe and tube fabrication, tool and die, exotic material fabrication, and pressure vessel fabrication. Supports TIG (GTAW, pulsed TIG), stick (SMAW), and air carbon arc (CAC-A) with 208–600 V single/three-phase input. Features include intuitive 17.5 cm LCD interface, Pro-Set™ parameter control, Pulsed waveform options, QuietPulse™ and Lift-Arc™ initiation, USB software updates, and Cooler-On-Demand™ for reduced noise and energy use.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages7

Reading Time18 min

AccessFree to download

Industrial Applications

TIG (GTAW) and Pulsed TIG (GTAW-P)

Stick (SMAW)

Air Carbon Arc (CAC-A)

Welder Control Features and Interface

Specifications and Performance Data

Maxstar ®400 Issued July 2024 • Index No. DC/24 .5 EN TIG/Stick Welding Power Source Industrial Applications Precision fabrication Tube mills Pipe and tube fabrication Tool and die Exotic material fabrication Pressure vessel fabrication Processes TIG (GTAW) Pulsed TIG (GTAW-P) Stick (SMAW) Air carbon arc (CAC-A) 6 mm maximum Input Power Amperage Range Rated Output Net Weight 208–600 V, 3-phase or 1-phase power 3–400 A 300 A at 32 V, 60% duty cycle 57 kg (126 lb.) Reimagined for Your Pursuit of Perfection. Unlock your full potential with the new Maxstar® 400 advanced DC TIG welder. Now equipped with an intuitive LCD interface that puts precision welding capabilities at your fingertips. Demand more from your machine and achieve results that you never thought were possible. Easy-to-understand interface with 17,5 cm LCD display. • Ensures proper machine setup and parameterselection. • Informative on-screen explanations and dynamic images enhance the parameter selection process. Maxstar® 400 machine only Activate QuietPulse by selecting sine or triangular waveshape to reduce audible noise. Blue Lightning™ provides more consistent high-frequency (HF) arc starts and greater reliability compared to traditional arc starters. Lift-Arc™ provides AC or DC arc initiation without the use of high frequency. Allows for any input voltage hookup (208–600 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power. Program memory allows easy naming, saving and recalling of favourite weld settings. • Deliver more productivity by eliminating the need to manually set the parameters • Deliver consistent quality by welders of all skills Pro-Set™ eliminates the guesswork when setting weld parameters. Locks and limits. Provides control of weld parameter ranges minimizing deviation from the welding procedure specification (WPS) . USB. Front panel port provides the ability to easily update software, back-up settings and transfer saved weld programs from one unit to the next. [Visit MillerWelds.com/TIGSoftware](Visit MillerWelds.com/TIGSoftware) for the latest software updates and expansions. Cooler Power Supply (CPS) is an integrated 120-volt dedicated-use receptacle for the Coolmate™ 3.5. Cooler-On-Demand™ feature operates the auxiliary cooling system only when needed, reducing noise, energy use, and airborne contaminants pulled through the cooler. Power source is warranted for three years, parts and labour. International Headquarters Miller Electric Mfg. LLC An ITW Welding Company 1635 W. Spencer Street Appleton, WI 54914 USA [MillerWeldsEurope.com](MillerWeldsEurope.com) Miller Europe Orbitalum Tools GmbH Josef Schuettler Str. 17 78224 Singen, Germany Tel.: +49 7731 792 400 [sales.MILLER@ITWwelding.com](sales.MILLER@ITWwelding.com) ITW WELDING Sales Office UK 77 New Court Way Ormskirk, Lancashire L39 2YT United Kingdom Tel.: +44 1695 585 910 [sales.UK@ITWwelding.com](sales.UK@ITWwelding.com) Weld Process Features DC TIG Exceptionally smooth and precise arc for welding exotic materials. Pulse. Pulsing can increase puddle agitation, arc stability and travel speeds while reducing heat input and distortion. These models provide extended ranges. Pulse Waveforms Square provides a fast freezing puddle for ultimate arc control. Sine produces a reduced audible sound and provides a more fluid puddle that is good for overlaying applications. Triangular provides a quick-forming puddle while further reducing heat for thin materials. QuietPulse.™ Activate QuietPulse by selecting sine or triangular waveshape to reduce audible noise. DC Stick DIG control allows the arc charac teristics to be changed for specific applications and electrodes. Lower the DIG setting for smooth running electrodes like E7018 and increase the DIG setting for stiffer, more penetrating electrodes like E6010 . Hot Start™ adaptive co

FAQs

What welding processes are supported by the Maxstar 400?

The Maxstar 400 supports TIG (GTAW) including pulsed TIG (GTAW-P), stick welding (SMAW), and air carbon arc (CAC-A).

How does QuietPulse™ and Lift-Arc™ work on this power source?

QuietPulse™ reduces audible noise by selecting sine or triangular waveforms. Lift-Arc™ enables AC or DC arc initiation without using high frequency.

What input power options and rated output does the Maxstar 400 provide?

It supports 208–600 V input with 3-phase or 1-phase power and provides rated outputs up to 300 A at 32 V with a 60% duty cycle, with detailed amperage range coverage across input voltages.

Oct 28, 2026

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