Explain the operation of drum plotter

** Drum Plotter : The operation of drum plotter are - 

1. Pen : An actual pen that draws on the plotted paper.

2. Write-move mechanism : used to lift and lower the pen.

3. Pen cartridge - holds several different colored pens. A plotter capable of multicolor output usually has a program in read-only memory (ROM) that instructs the plotter to pick up a new pen when the programmers require a color change.

4. x Driver motor - moves the pen horizontally across the paper.

5. y Driver motor - rotates the drum forward & backward.

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