Page 298 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Mirroring drawings

CADD allows you to create mirror images of drawings. This capability is very useful when you want to draw something
that is symmetrical on both sides. You need to draw only one half of the drawing; the rest of the drawing can be
completed using the mirror function. To make a mirror image, you need to select the objects to be mirrored and
indicate a mirror axis. The mirror axis is an imaginary line along which the diagram is mirrored.
Array
Rectangular array

To draw rectangular array
1 Choose Modify, array.
(or)
2 Click The array icon.

Or
3 Type ARRAY at the command prompt. Command: ARRAY objects to array. Select
4 Pick Objects to array. Select Objects:(select)
5 Type The number of rows top to bottom. Number of rows (----) <1>: (number)
6 Type The number of columns left to right. Number of columns (III) <1>: (number)

7 Type The unit cell distance between items in each row. Distance between rows: (+number=up,
number = down)
8 Type The unit cell distance between items in each column.
Distance between columns: (+ number = right, - number = left)

Creating an array of objects (Fig 14)

Fig 14

The array command in AutoCAD is used to make multiple copies of objects. Although you can use the copy
command to duplicate objects, the array command is more flexible and precise. One advantage of using
the array command is that it allows you to copy objects in a defined angle and exact number of copies.
Therefore, you can create array in various pattern. For example, you can show multiple objects in a row, column,
or irregular pattern such as a spiral. Let’s look at a few examples below: (Fig 15 & 16)

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CITS : Engineering Drawing (Mechanical) - Exercise 12