Printed circuit board milling

Printed Circuit Board (PCB) milling is a process for making electronic circuits. It is like a puzzle or a jigsaw. The tool used is called a CNC machine. It looks like a big printer and it moves a small metal tool back and forth across the sheet of special metal-coated paper (the PCB) to create pathways and shapes following a pattern. The metal tool cuts through the metal coating on the paper to make precise patterns. Depending on the board, this may be a few simple lines, or complex 3D shapes. The pathways and shapes that are cut onto the board are used to make electrical pathways for electricity to flow through and create a working circuit. In the end, the copper pathways on the board are used to connect electronic parts and components, making the circuit work.