A swing device for a grinding machine includes a motor located on a fixed table beside the sanding unit which includes a frame with two mandrels and a sanding belt is mounted to the two mandrels. The mounting units each include an elongate rail and a plurality of leg assemblies. The carbon-containing metal material is annealed to cause graphene to precipitate onto the bottom of the metal material to form a graphene layer between the metal material and the material substratematerial layer and also onto the top andor sides of the metal material. The wireless network sends a Layer 2 acknowledgment upon successfully decoding the second message.