Drum plotters are designed for larger paper sizes than flatbed plotters
. In the drum plotter, the two axes for XY display are achieved by the forward and backward movement of the drum and by the single-axis pen movement. With the drum plotter, the paper can be moved back and forth across the drum while the drawing pen(s) 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.
areused or, as with inkjet prin
ters, aprint head
with CMY colours is used. Drum plotters are used for construction drawings, circuit diagrams and building plans, usually in conjunction with CAD systems.