907539 - Miller Maxstar 280 DX TIG/Stick Welder with CPS

Industrial DC TIG and Stick Welding Power Source

The Miller Maxstar 280 DX (907539) is a premier industrial power source designed for precision DC TIG and Stick welding applications. Engineered for versatility and performance, this unit features Miller's proprietary Auto-Line Power Management Technology, which allows for automatic connection to any single-phase or three-phase electrical input ranging from 208 to 575 V. This eliminates the need for manual linking, providing seamless operation across various job sites with dirty or unreliable power. The unit delivers a welding output range of 1 to 280 Amps, capable of welding steel materials from 0.004 inches up to 3/8 inch thick.

This specific model includes the Cooler Power Supply (CPS), an integrated 120-volt dedicated-use receptacle designed to power the Coolmate 1.3 water cooler. The power switch on the Maxstar simultaneously activates the receptacle, ensuring the cooling system is active during operation to prevent torch failure. The DX model designation indicates advanced functionality, including extended ranges for the sequencer, full trigger options, preflow control, and a high-speed pulser capable of up to 500 PPS. These features allow for precise heat input control, essential for critical applications in aerospace, heavy fabrication, and high-purity processing.

Technological advancements in the Maxstar 280 DX include QuietPulse, which modifies the DC pulse waveshape to create a slower, more fluid transition between background and peak amperage, significantly reducing audible noise. The Pro-Set feature eliminates guesswork by offering professionally optimized settings for Balance, Frequency, Pulse, and DIG parameters. For Stick welding, the machine offers tailored arc control (DIG) to adjust arc characteristics for specific electrodes, such as smooth-running 7018 or penetrating 6010, alongside Hot Start adaptive control for positive arc initiation. The unit is housed in a durable case featuring Wind Tunnel Technology to protect internal components and Fan-On-Demand cooling to reduce energy consumption and noise.