How does the drum plotter works?

A drum plotter works by using a rotating drum that holds the paper or medium on which the drawing will be made. As the drum rotates, a pen or other drawing instrument moves back and forth across the surface, creating lines based on digital input. The movement of the pen is controlled precisely to reproduce graphics, diagrams, or plots as specified by computer-generated coordinates. This method allows for high-resolution output and is often used for large-format printing in engineering and architecture.