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| drum plotter on which. |
Drum Plotter: in as drum plotter on which the design has to be made, is placed over the drum. which can rotate both clockwise and anti clock wise direction to produce vertical motions, the mechanism also consists of one or more potholders mounted perpendicular to the drum’s, surface the pen (s) clamped in the holder (s) can, move left to right. or right to left to produce horizontal motions. the movements of the drum and the pen (s) are, controlled by the graph plotting program. that is, under computer control the drum a the as pen (s) move simultaneously to draw the designs and graphs on the sheet placed on the drum. the plotter can also annotate the design and graph so drown by using, the pen to draw character of various size, since each pen is program selectable pens having ink of different color can be mounted in different holder to produce multi colored designs figure 9.22 shows as a drum plotter.