Autocad 2d Module 24 PDF

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Learning Outcomes:

AutoCAD Self-paced Learning Modules

AutoCAD 2DModule 24Arraying

When you have completed this module, you wil l be able to:

1. Describe and apply the ARRAY command to array an object(s) in polar or rectangular

patterns.

Arraying

The ARRAY command is used to create multiple copies of an object(s) in a polarorrectangular

pattern. It is another one of those powerful commands that when used at the right times canprove to be very productive.

Figure 24-2

Rectangular Array

AutoCAD Command: ARRAY

Figure 24-1

Polar Array

The ARRAY command is used to make multiple copies of an object either in a rectangular or apolar pattern.

Shortcut: AR

2004-2008

2000-2002

Arraying The CAD Guys Ltd. Copyright 1993 - 2007 Module 24
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24 - 2 AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-13

Notice to AutoCAD 2000 and AutoCAD 2000 LT Users

The ARRAY command in AutoCAD 2000 or 2000 LT does not have a dialogue box. You

must use the command line prompts to use the command. It is a little harder to use but youcan still complete all lab exercises. If you have trouble, ask your instructor for help.

Using the ARRAY Command

Step 1 Start a new drawing using the template Module Template B.

Step 2 Save and name the drawing AutoCAD 2D Workalong 24-1.

Step 3 Create the layers as shown in

Figure Step 3.

Step 4 On layer Object, draw the

object shown in Figure Step 4A outsidethe border of the drawing as shown infigure Step 4B. The location you drawthe object is not important. It is simply acircle with lines from quad to quad inboth directions.

Figure Step 4A

Figure Step 5A

Figure Step 3

Figure Step 4B

Step 5 Create the drawing shown in Figure Step 5A. Draw two circles on layer

Construction and copy the object you drew in Step 4 to the four locations shown in FigureStep 5A. Your completed drawing will appear as shown in Figure Step 5B.

...continued on page 24-3



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AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-13

Using the ARRAY Command - Continued

Figure Step 5B

Step 6 Enter the ARRAY

command. It will open theArray dialogue box asshown in Figure Step 6.

Step 7 Enable Polar Array

mode as shown in FigureStep 7.

Figure Step 7

Step 8 Select the Show

Me icon at the end of theCenter Point box as shownin Figure Step 8.

Figure Step 6

Step 9 Snap to the center

of Circle A as shown in Figure Step 9A.You will now see the coordinates X2.5Y8.5display in the Center Point box as shown inFigure Step 9B.

Figure Step 8

Figure Step 9BFigure Step 9A


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Step 10 Ensure that the Method and values

box matches Figure Step 10.

Step 11 Ensure that the Rotate items as

copied is enabled as shown in Figure Step 11.

Figure Step 11

Step 12 To select the object(s) to array, click the

Select object Show Me icon as shown in Figure Step12A. Using a window, select the objects to be arrayedas shown in Figure Step 12B.

Figure Step 12A

Step 13 Click OK and your array should now

appear as shown in Figure Step 13.

Step 14 Enter the ARRAY command again.

For circle B, you are going to array the object

without rotating it. Using what you just learned,select Polar Array, the center of circle B andselect the object as shown in Figure Step 14Aand 14B.

Figure Step 14A


Figure Step 10

Figure Step 12B

Figure Step 13

Figure Step 14B



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Step 15 Disable Rotate items as copied as shown in Figure

Step 15.Step 16 Click the More button as shown Figure Step 15in Figure Step 16A. It will open the Objectbase point portion of the dialogue box. Disable the Set to Objects's

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Figure Step 16A default as shown in Figure Step 16B.

Step 17 Click the Show me icon and then

select the center of the object being arrayedas the objects base point as shown in FigureStep 17.

Figure Step 16B

Figure Step 17

Figure Step 19A


Step 18 The Base point should now read X7Y8.5

as shown in Figure Step 18.

Figure Step 18

Step 19 Click OK and the array should appear as

shown in Figure Step 19A and 19B.

Figure Step 19B

Arraying

When you see a Show me icon inside a dialogue box like theone shown to the right, it is telling you that you can pick anobject, size or numerical value rather than entering data on thekeyboard. Try to use these Show me icons whenever possible.They will help you draw faster.

The CAD Guys Ltd. Copyright 1993 - 2007 Module 24


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Step 20 To draw the saw blade object

shown in Figure Step 20, complete thefollowing four steps.

Step 21 Draw the three circles and the line

shown in Figure Step 21. Note how the smallcircle is on layer Object and the larger circlesand the line are on layer Construction.

Step 22 Array the line

48 times. Use thecenter of the circles asthe base point andensure that you rotatethe line as you array it.

Figure Step 20

Figure Step 21 See Figure Step 22.

Step 23 On layer Object, draw two lines to form one saw

tooth. See Figure Step 23.

Figure Step 22

Figure Step 23

Figure Step 24B

Step 24 Array the tooth 24 times. Freeze layer

Construction to complete the object. See FigureStep 24A and 24B.

Arraying


The CAD Guys Ltd. Copyright 1993 - 2007

Figure Step 24A

Module 24


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Step 25 Enter the

ARRAY command and inthe Array dialogue box,

enable the RectangularArray box as shown InFigure Step 25A and 25B.

Figure Step 25B

Step 26 Click the Selectobjects icon and thenusing a window, select theObject C as shown in

Figure 26.

Figure Step 25A

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Figure Step 25B Step 27 Enter 3 for

the number of Rowsand 5 for the number ofColumns as shown inFigure Step 27.

Figure Step 27

Figure Step 26

Step 28 Enter 1.5 for the

Row offset and 1.0 for the

Column offset. See FigureStep 28A and 28B.

Step 29 Click OKand the rectangulararray should appearas shown in Figure29.

Figure Step 28A

Figure Step 28B

Arraying

Figure Step 28 ...continued on page 24-8



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Step 29 Enter the ARRAY command.

Select Circle D asshown in Figure

Step 29A and 29B.

Figure Step 29B

Step 30 Enter the number of Rows to 5

and Columns to 4 as shown in FigureStep 30. Figure Step 29A

Figure Step 30

Figure Step 31A

Author's Comments:

The Row and Column offsets can bea positive or negative number. Apositive number is right and up and a

negative number is left or down.

Step 32 Save and close the

drawing.

Completed Drawing

Step 31 Set the Row Offset to -0.5 and the

Column offset to -0.75. and the Angle of array to30 as shown in Figure 31A and 31B.

Figure Step 31B

Arraying

When an object is arrayed, all object(s) created in the array will retain theproperties of the original object, even the layer it resides on. This happensregardless of the current layer when the ARRAY command is executed.



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In a rectangular array, the offsetdistance is measured from the one pointon the object to the same point on thearrayed object.

If you are arraying anobject where you onlyknow the distancebetween the objects,you must add thewidth to the spacingfor the column offsetand height to thespacing for the rowoffset.

If you know the distances from center to center of the

object, simply use them as the offset distances.

Geometry Lesson

Finding Centers and Placing Circles inside Regular Polygons

A simple method of finding the center of a regular polygon is toinsert a circle that touches three sides. The center of the circle isthe center of the polygon..

To insert the circle, use the 3P option in the CIRCLE command andeither use the tangent object snap mode or even better, let yourautosnap pick the midpoint.

Command: CIRCLESpecify center point for circle or [3P/2P/Ttr (tan tan radius)]: 3PSpecify first point on circle: (mid) P1

Specify second point on circle: (mid) P2Specify third point on circle: (mid) P3Command:

Command: CIRCLE

Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: 3PSpecify first point on circle: (tan) P4

Specify second point on circle: (tan) P5Specify third point on circle: (tan) P6

Command:

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Method of Selecting Objects

Method Abb. Description Display

Window

Polygon

CrossPolygon

WP Selects all the objects that are totally

inside a window defined by a polygon.The polygon shaped window will appearas a solid line. Do not close the polygon.Simply press the enter or space keywhen you are at the last location, in thisexample, P8

Command: ERASE

Select objects: WP

CP Selects all the objects that are totallyinside and the ones that cross a windowdefined by a polygon. The polygon willappear as a dashed line. Do not closethe polygon. Simply press the enter orspace key when you are at the lastlocation, in this example, P9.

Command: ERASE

Select objects: CP

Fence F Selects all the objects that are crossed by

a line or a series of lines. The fence linewill appear as a dashed line.

Command: ERASESelect objects: F

The Key Principles in Module 24

1. When an object is arrayed, all object(s) created in the array will retain the properties of

the original object, even the layer it resides on. This happens regardless of the currentlayer when the ARRAY command is executed.



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Lab Exercise 24-1

Drawing Specifications

Time Allowed: 45 Min.

Name

AutoCAD 2D Lab 24-1

Template

Module Template A3

Units

Millimeters

Text Style

N/A

Font

N/A

Objects on Layer Name

Layering Scheme

Color Linetype Lineweight

Construction Objects

All Objects

Text in the Titleblock

Instructions:

Construction

Object

Titleblock Text

253

Red

White/Black

Continuous

Continuous

Continuous

N/A

N/A

N/A

1. Draw the object below using the ARRAY.2. Fill in the titleblock using the standards in

Module 20, page 20-14.

Detail of Hexagon

Completed Drawing



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Construction Hints

Do your best to complete the lab exercise drawing without using the following hint(s). If you get

stuck and can't complete it on your own, use the following hint(s) to help you.

Hint 1

Figure Hint 1-1 -Draw and then arraythe line 64 times.

Figure Hint 1-2 and

1-3 - Trim thecircles.

Figure Hint 1-1

Figure Hint 1-2

Figure Hint 1-3

Figure Hint 1-4 and 1-5 - Fillet and trim the lines.

Figure Hint 1-4

Hint 2

Figure Hint 1-5

Figure Hint 2 - Draw the hexagon first with the top and bottom lines horizontal. Then rotate it

to the correct angle.

Figure Hint 2



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Lab Exercise 24-2

Drawing Specifications

Time Allowed: 60 Min.

Name Template Units Text Style Font

AutoCAD 2D Lab 24-2 Module Template A2 Millimeters N/A

Layering Scheme

N/A

Objects on Layer

Construction Objects

Object Lines

Top Right Arrayed Objects

Top Left Arrayed Objects

Bottom Left Arrayed Objects

Name

Construction

Object

Object Top Right

Object Top Left

Object Bottom Left

Color

253

Red

Blue

Green

40

Linetype

Continuous

Continuous

Continuous

Continuous

Continuous

Lineweight

N/A

N/A

N/A

N/A

N/A

Bottom Right Arrayed Objects Object Bottom Right 183 Continuous N/A

Copied ObjectsInstructions:

Object Copied 71 Continuous N/A

1. On layer Titleblock, draw lines dividing thedrawing sheet into four equal parts as shownbelow.

2. On layer Object, draw the object shown on theright. Draw it outside the drawing border at anylocation.

3. Copy the object to each location as shown below.Take note of which corner of the object is you are

locating.4. Change the layer of the object in each quadrant

to match the layering scheme shown above.



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5. Array the object as shown below. Be careful of the spacing as the dimensions are tricky.

6. Make a copy of allthe objects, exactlyin the same location

as the original ones.7. Change layer of the

copied object tolayer CopiedObjects.

8. Using the WP, CP,and F methods ofselecting objects,erase the object offthe Copied Objectlayer to match thedrawing on the right.Be careful, you do

not erase theoriginal objects.9. Fill in the titleblock,

using the standardsin Module 20, page20-14.


Documents

Autocad 2d Module 24 PDF