Cad Guidebook: A Basic Manual for Understanding and Improving Computer-Aided Design by Stephen J. Schoonmaker

Author:Stephen J. Schoonmaker [Schoonmaker, Stephen J.]
Language: eng
Format: epub
Tags: Science & Math, Biological Sciences, Biotechnology, Professional & Technical, Medical eBooks, Special Topics, Professional Science
ISBN: 0824708717
Amazon: B000PUBBGC
Published: 0101-01-01T00:00:00+00:00

150 Chapter 6

TABLE 6.1

General Plotter Setup

Issue Comments

Pen mapping If a pen plotter format (such as HPGL) is chosen for the CAD system

and plotter, then a map may be developed and saved in the system to

indicate what pen information on the device is equivalent to the entity

information in the CAD system (color, etc.).

Clipping Many plotting devices can have a maximum plot size. This would in-

volve clipping or removing unwanted data from beyond these sizes.

This is often an issue for CAD system that uses the “model space”

approach explained in Chapter 5.

Nesting More sophisticated plotting devices handle the optimization of paper

use by making various plots of various sizes fit together on the paper

size (perhaps even rotating the images). This is referred to as “nest-

ing.” Normally paper is fed from a roll.

Rotating Many plotting devices or plot managers will allow the plots to be ro-

tated. This may help to fit more plots on a given sheet or roll. Scaling Many plotting devices or plot managers will allow the plots to be scaled.

In this case, the plots can be made larger or smaller as needed. This

scaling can often be done in the CAD system as well as the plotter

device, so administrators should be careful to avoid getting “scale of a

scale” problems.

drawing is complete enough to have those beyond the engineering department ac- cess the drawing. Completion of the drawing would include being checked and approved as well as having the appearance of the drawing completed. Those be- yond the engineering department could include manufacturing, purchasing, mar- keting, technical publications, and field support functions within the company (with manufacturing also meaning to include suppliers or vendors). In the case of engineering being done as a contractor to another company or for a government project, release could be to the end-user or customer, as well.

With paper drawings being used as the sole end-product, release of the drawing would mean physically making the drawing available to the other groups. The released or official drawing would be filed in an appropriate vault. When different parties need to access the drawing, then they would request a copy of the drawing, and then it would be sent to them according to a docu- mented procedure.

The actual release procedure goes by many different acronyms. The term generally used in this work for drawings is ECR (meaning Engineering Change Record or Release). Other terms are ECO (Engineering Change Order) or ECN (Engineering Change Notice or Number). Even though these terms indicate a change, this process is assumed to apply to the release of brand new drawings as

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