NovaTech Inc. (www.novatechinc.com) says welders can use microscope-based welding systems to repair molds, dies and tools with less than 0.0005-in. of sink in the heat-affected zone, resulting in welds that last longer and require less rework than conventional TIG welds. Each of the company's micro-welding systems features a microscope and the lighting for the magnification required to maintain the small arc needed in low-amperage miniature TIG welding.