It is a french word that means card com recording

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e than one pen in the pen(s) holding mechanism. Since each pen is program selectable, pens having ink of different colors can be mounted in different holders to produce multi colored designs. The plot size is restricted by the area of the bed. Some may be as small as. A4 size (8"xll" page) while some very large beds used in the design of cars, ships, aircrafts, buildings, highways, etc. can be up to 20 ft. by 50 ft. Some plotters are also designed to etch plastic or metal plates. In this case, the plastic or metal sheet is spread on the bed and the drawing pen has a sharp-edged needle. A flatbed plotter is shown in Figure 9.35. Plotters are normally very slow in motion because of excessive mechanical movement required during plotting. Hence there is a great mismatch between the speed of the CPU and the speed of a plotter. Because of this reason, in most cases, output is first transferred by the CPU onto a tape and then the plotter is activated to plot the design from the information on the tape. However, in case of a computer system dedicated to design work, the CPU may send output directly to a plotter. Computer Output Microfilm (COM) COM is an output device that allows computer output to be recorded on a sheet or roll of microfilm as microscopic filmed images. COM devices commonly use a sheet of film measuring 4"x6" for recording output information. This sheet of film is called a microfiche ("fiche" is pronounced as "fish". It is a French word that means card). COM recording process produces page images that are 48 or more times smaller than those produced by conventional printers. Hence a single microfiche can hold about 300 times as much information as a standard computer printed page. COM uses a microfilm recorder for recording output information on a microfiche, and a microfilm reader to view the information recorded on a microfiche. The microfilm recorder receives output information from the computer system which it projects pageby-pa...
View Full Document

This document was uploaded on 04/07/2014.

Ask a homework question - tutors are online