The dream of a real lightsaber has always sounded like a physics joke, not an engineering brief. Yet a retractable plasma ...

There's basically one: if you're cutting thick steel plate—not aluminum, not stainless. You need a ferrous material or else ...

The Cutmaster X 90 and Cutmaster X 110 from Thermal Dynamics, an ESAB brand, feature a new arc starting mechanism that the company says has no moving parts, and starts the arc within a few thousandths ...