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Automated drafting or computer graphics is a way of converting the computer's impulses into engineering documents and, conversely, to translate the operator's instructions into electronic data.
In many of the more sophisticated systems, we need to know little about computer programming in order to control the human-machine effort.
In general, automated drafting or computer graphics includes any device which converts computer language to people language, or any device that converts people language to computer language, with the intent of solving problems by creating graphical images.
Most automated drafting machines are easy-to-operate, self-contained, automated systems for the direct translation of rough sketches into high-quality finished ink on vellum drawings.
The system is designed for simple, real-time operation by draftspersons or designers and is particularly useful for producing drawings containing repetitive zymology and text. It can be installed in a drafting room since it does not depend in an outside processing source. Applications include logic diagrams, technical illustrations, electrical and electronics schematics, piping and hydraulic layouts, and many other drawings.
Automated drafting involves the creation of hard-copy engineering drawings directly from the CAD data base. In some early computer-aided design departments, automation of the drafting process represented the principal justification for investing in the CAD system. Indeed, CAD systems can increase productivity in the drafting function by roughly five times over manual drafting.
Some of the graphics features of computer-aided design systems lend themselves especially well to the drafting process. These features include automatic dimensioning, generation of crosshatched areas, scaling of the drawing, and the capability to develop sectional views and enlarged views of particular pan details. The ability to rotate the part or to perform other transformations of the image (e. g. , oblique, isometric, or perspective views), as illustrated in Fig. 6.7 can be of significant assistance in drafting. Most CAD systems are capable of generating as many as six views.
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