Miller Dynasty® 280DX

Powerful combination of capability and portability


The Dynasty® 280DX combines advanced inverter technology with Auto-Line™ technology, offering a flexible AC/DC TIG/Stick welding machine.

Offers full AC features, including advanced waveforms and wide ranges of balance and frequency.

Extremely portable and easy to transport featuring dual carry handles and a carrying strap.

Features Miller’s Auto-Line™ technology.

Where to Buy

Product Overview


  • Aerospace
  • Construction
  • Heavy Equipment Manufacturing
  • Infrastructure
  • Manufacturing
  • Railcar
  • Shipbuilding
  • Boat / Yacht
  • High Purity Processing

What's In The Box

  • Dynasty® 280DX
  • 2.4 m primary cord
  • Adjustable shoulder strap
  • Quick Reference Guide
  • (2) 50 mm Dinse style connectors


For details, refer to the Miller warranty statement.

Update & Expand

Front panel memory card data port provides the ability to easily update software and expand product features.

Pro Set

Eliminates the guesswork when setting the weld parameters. Use Pro-Set when you want the speed, convenience and confidence of preset controls. Simply select the feature and adjust until Pro-Set appears on display.

Sleep Timer

Conserves electricity. This programmable feature will power down the machine if it sits idle for a specified time.

Blue Lighting™

High-frequency (HF) arc starter for non-contact arc initiation. Provides more consistent arc starts and greater reliability compared to traditional HF arc starters.

Wind Tunnel Technology™

Protects internal electrical components from airborne contaminates, extending the product life.

Meter Calibration

Allows digital meters to be calibrated for certification.


Power source cooling system operates only when needed, reducing noise, energy use and the amount of contaminants pulled though the machine.

Auto-line Power Management Technology™

Allows for any input voltage connection (120 – 480 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power. Will run on single phase and 3 phase power. Tolerant to lower generator output.

DC TIG Features

  • Exceptionally smooth and precise arc.

AC TIG Features

  • Balance control provides adjustable oxide removal which is essential for creating the highest quality aluminium welds. DX models provide extended ranges.
  • Frequency controls the width of the arc cone and can improve directional control of the arc.

AC/DC Stick Features

  • Hot Start™ adaptive control provides positive arc starts without sticking.
  • AC frequency control adds stability for smoother welds when AC Stick welding.
  • Stick-Stuck detects if the electrode is stuck to the part and turns the welding output off to safely and easily remove the electrode. Menu selectable.


  • Stick
  • TIG
  • 1 Phase
  • 3 Phase
  • Input Voltage
    208 V
    220/230/240 V
    380/400 V
    460/480 V
    575 V
  • Input Phase
    1 and 3 Phase
  • Input Hz
    50 / 60 Hz
  • Current Type
    AC / DC
  • Max Open Circuit Voltage
    60 VDC
  • Amperage Min.
    1 A
  • Amperage Max.
    280 A
  • Weld Output
  • Dimensions (mm)
    H: 346
    W: 219
    D: 596
  • Weight

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