Machine Drawing

410 Machine Drawing

dharm
d:\N-Design\Des21-1.pm5

Scale — by entering a display scale factor, the size of the object can be changed at

will in its appearance.

21.8.3 Cross-hatching and Pattern Filling

It is common practice to fill an area with a pattern of some sort. The pattern can help differentiate

between components, or it can signify the material composition of an object. This is accomplished

by HATCH command. Hatching generates line entities for the chosen pattern and adds them to

the drawing. AutoCAD normally groups these lines into a general block.

HATCH Command—performs hatching. The pattern filling is illustrated in Fig. 21.11,

by selecting appropriate choice in response to HATCH command.

Command: HATCH

Pattern (? Name/ u, style) :

Pattern name may be entered by choosing various available patterns which will be

displayed by choosing u, by interaction, the angle, spacing between the lines and double hatch

area may be specified. By choosing style (Fig. 21.11), pattern filling may be achieved.

ab

Area to be hatched

abab

Normal style

(default)

ab

Outer most style

abab

Ignore style

Fig. 21.11

21.8.4 Utility Commands

END Command — this command exits the drawing editor and returns to the main

menu and updates the drawing file.

SAVE Command — this command saves the new/modified drawing and returns to the

main menu. However, without exiting the drawing editor, if the

changes are to be periodically saved, it is desirable to use this

command. It protects the work from possible power failures, editing

errors, etc.

Command: SAVE

File name : return to save the current file

QUIT Command — this exits the drawing editor without saving the updated version

of the current drawing and returns to the main menu. The AutoCAD

checksup with the user for one more confirmation to avoid the

accidental quitting since all the editing work done would be lost.

TEXT Command — text may be added to a drawing by means of the TEXT command.

Text entities can be drawn with a variety of character patterns or

fonts and can be stretched, compressed or drawn in a vertical

column by applying a style to the font.