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Miller Maxstar 400 DC TIG Welder Water Cooled Package – New Version
£7,460.00 (ex VAT) £8,952.00(inc VAT)
The Miller Maxstar 400 DC TIG Welder is a powerful, compact power source capable of welding up to 5/8 in. material. High speed pulse control provides maximum productivity and weld quality while conserving energy compared to traditional welding machines. Buy the best-Buy Miller Welding Machines.
Orders OVER £60 (Excluding VAT)
Orders UNDER £60 (Excluding VAT)
Republic of Ireland: £8.50 (+VAT)
UK Mainland: £8.50 (+VAT)
See our Shipping & Returns page for more information
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Miller Maxstar 400 DC Tig Welder
The Miller Maxstar 400 DC TIG Welder is a powerful, compact power source capable of welding up to 5/8 in. material. High speed pulse control provides maximum productivity and weld quality while conserving energy compared to traditional welding machines.
Better Than Online Price Available – Call to Save
While we display a standard price online, we can often offer a better deal over the phone. If you’re purchasing multiple units, bundling accessories, or just want the best possible price:
Call 028 9046 0541 and ask for our best pricing on the Miller Maxstar 400 DC.
Amperage Min 3 A
Amperage Max 400 A
Features of the Miller Maxstar 400 DC Tig Welder:
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Intuitive Interface LCD Display – Ensure proper machine setup and parameter selection with informative on-screen explanations and dynamic images.
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QuietPulse – QuietPulse is activated by changing the waveshape for DC pulse welding, creating a slower, more fluid transition between the background and peak amperage to create the least possible audible noise. To understand more about Miller’s QuietPulse, click here.
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DC TIG Features -Exceptionally smooth and precise arc for welding exotic materials. Â High-speed DC TIG pulse controls – Pulse frequency capable of pulsing 5000 pulses per second. Pulsing adds arc stability, reduces heat input and warpage and can increase travel speeds. Other parameters include peak amperage, peak time and background amperage.
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Blue Lightning– High-frequency (HF) arc starter for non-contact arc initiation. Provides more consistent arc starts and greater reliability compared to traditional HF arc starters.
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Pro-Set Feature (professional settings) -This feature eliminates the guesswork when setting weld parameters. Use Pro-Set when you want the speed, convenience and confidence of pre-set controls. Simply select the feature and adjust until Pro-Set appears on the display. The Pro-Set feature is available for Balance, Frequency, Pulse and DIG parameters.
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Auto-Line Technology – For portability and reliability this inverter power supply allows for any single-phase input voltage hookup (208–600 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power.
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Program Memory- Allows easy naming, saving and recalling of favorite weld settings.
Miller Maxstar 400 DC Tig Welder Tig Runner Price Includes:
- Miller Maxstar 400 Power Source
- Miller Maxstar 400 Tig Runner Cart
- Miller Coolmate 3.5 with quick connects Water Cooler
- Miller Eurotorch W350 x 4 metre long water cooled tig torch
- Four Bottles of Miller Coolant
- Ground cable and clamp 5 metres
Input power plug not included on the Miller Maxstar 400 Tig Welder.
Miller True Blue 3 Year Warranty
You may also be interested in this Miller welding helmet PAPR-Miller
Delivery time on this machine may vary, please give us a call to discuss other configurations and confirm delivery times 028 9046 0541
When to Use DC Tig versus AC Tig?
DC TIG Welding
Direct Current (DC) TIG welding is the most commonly used type for TIG welding, particularly suitable for ferrous metals like steel, stainless steel, and copper. In DC welding, the current flows in a constant direction. When using DC TIG welding, the electrode can be set in either Direct Current Electrode Positive (DCEP) or Direct Current Electrode Negative (DCEN). However, DCEN is predominantly used in TIG welding.
With DCEN, the current flows from the electrode to the workpiece, concentrating the heat on the workpiece. This arrangement produces deep penetration in the weld, making it highly effective for thicker materials. DC TIG welding creates a stable arc, with little to no spatter, allowing for precision and smooth, visually appealing welds. DC welding also provides excellent control over the heat input, enabling welders to work with thin materials without burning through. Given its stable arc and precise control, DC TIG welding is widely used in industries where high-quality welds are essential, such as aerospace and automotive manufacturing.
However, DC TIG welding has limitations, particularly in its inability to weld non-ferrous metals like aluminum and magnesium effectively. These metals form an oxide layer when exposed to air, which must be cleaned to ensure a strong bond. DC welding lacks the inherent cleaning action needed to break up this oxide layer, leading to a weaker or contaminated weld.
AC/DC TIG Welding
AC/DC TIG welding machines offer the flexibility of switching between Alternating Current (AC) and Direct Current (DC), expanding the range of materials that can be welded. Alternating Current is especially effective for non-ferrous metals such as aluminum and magnesium, making AC/DC TIG welders valuable in applications requiring a variety of materials. In AC welding, the current alternates between positive and negative, allowing for both heating and cleaning in one cycle.
The positive half of the AC cycle, or the DCEP phase, provides a cleaning action by breaking up the oxide layer on the metal surface. This is particularly important when working with aluminum, as it ensures that the weld pool bonds well to the base material. During the negative half of the cycle (DCEN phase), the heat is focused on the workpiece, allowing for deep penetration similar to DC welding. This alternating cycle creates a balance between cleaning and heating, which is essential for clean, high-quality welds on non-ferrous metals.
Many AC/DC TIG machines also allow the welder to adjust the balance between the positive and negative cycles, which is known as “AC balance control.” By controlling the duration of the cleaning and penetration phases, welders can optimize their settings to match the requirements of the material and thickness they are working with. This level of control is ideal for complex projects and ensures that weld quality is maximized.
Key Differences and Considerations
- Material Compatibility: DC TIG welding is primarily used for ferrous metals like steel and copper, whereas AC/DC TIG welding can handle a broader range of materials, including aluminum and magnesium, which require the cleaning action provided by AC.
- Arc Stability and Precision: DC TIG welding offers a highly stable arc with minimal spatter, making it suitable for precise work on thin materials. AC welding is less stable by nature due to the alternating current, but advancements in inverter technology have improved its stability.
- Equipment Complexity and Cost: AC/DC TIG machines are generally more complex and costly due to the added capability of switching between AC and DC. However, for welders who need versatility across various materials, the investment in an AC/DC machine is often justified.
- Control Features: AC/DC TIG welders often come with advanced features like AC balance control, allowing greater customization in the welding process. DC TIG welders, while simpler, offer excellent control over penetration and arc stability, making them effective for ferrous metals.
Conclusion
In summary, DC TIG welding is best suited for ferrous metals, offering precision, stability, and deep penetration. In contrast, AC/DC TIG welding provides versatility, allowing welders to work effectively with both ferrous and non-ferrous metals. For welders who primarily work with steel, a DC TIG machine may suffice. However, those needing to weld materials like aluminum would benefit from the added flexibility of an AC/DC TIG welder. The choice between DC and AC/DC TIG welding ultimately depends on the materials involved and the level of control required for the specific application. For DC Tig Welding, choose the Miller Maxstar 400.
QuietPulse
DC TIG Features
Blue Lightning
Pro-Set Feature (professional settings)
Auto-Line Technology
Program Memory