drum plotter
Drum plotters are designed for larger paper sizes than flatbed plotters. In the drum plotter, the two axes for the XY display are achieved by the forward and backward movement of the drum and by the single-axis pen movement.
In the drum plotter, the paper can be moved back and forth over the drum while the drawing pen or pens move along one axis. The drawing pen is then pressed when it has reached its coordinate position and the paper has fixed the second coordinate via the roller movement.
As far as the length of the plot is concerned, there are no limits, only the maximum width is determined by the length of the pen movement. For colored plots, several drawing pens with different colors are used or, as in the case of inkjet prin ters, one print head with CMY colors is used.
Drum plotters are used for construction drawings, schematics and blueprints, usually in conjunction with CAD systems.