Orion Welders by Sunstone – The Micro Spot Welding Authority. Sunstone designs and manufactures high-tech micro welding and engraving solutions for many different industries. In short, wherever a very small spot weld is needed in a very precise location, you’ll Orion produces, and sells the best pulse arc welders in the world. Laser welders and engravers. Products for jewelry, dentistry, and mold & die work.