A typical robotic laser cutting system consists of a servo-controlled, multiaxis mechanical arm that has a laser cutting head mounted to the robot's faceplate. The cutting head has focusing optics for the laser light and often an integral height control mechanism. An assist gas delivery package distributes a cutting gas, such as oxygen or nitrogen, to the cutting head. Most systems use an Nd:YAG laser generator, which can deliver the laser light to the robot cutting head through a fiber-optic cable.