autocad 2d module 35 pdf

8/14/2019 Autocad 2d Module 35 PDF

1/18

Learning Outcomes:

AutoCAD Self-paced Learning Modules

AutoCAD 2DModule 35

Dimensioning - Part 2

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

1. Describe the six basic dimensioning types.

2. Describe and apply the DIMLINEAR, DIMALIGNED, DIMDIAMETER, DIMRADIUS andQLEADER commands

Drafting Lesson

Basic Dimension TypesFigure 35-1 shows the six basic dimension types you will be learning to insert and edit in thismodule. They are linear, aligned, angular, diameter, radius and leader dimensions.Advanced dimensioning is covered in the AutoCAD Customization Modules.

Figure 35-1

Basic Dimensioning Types

Dimensioning - Part 2 The CAD Guys Ltd. Copyright 1993 - 2007 Module 35
http://www.abbyy.com/buyhttp://www.abbyy.com/buy


2/18

35 - 2 AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-09-13

Inserting Dimensions

In this module, you will be taught how to insert and edit linear, aligned, angular, radius,

diameterand leaderdimensions. When a dimension is inserted, it resides on the current layerand assumes the color of that layer.

Before dimensioning a drawing, it is important to check the following settings:

1. The current layer. That is the layer the dimensions will reside on.

2. The current dimensioning style. The dimension you insert with anydimensioning command will use the properties of the current

dimensioning style.3. The DIMASSOC or DIMASO setting. This setting controls whether the

dimensions being inserted will be an associative, non-associative orexploded dimensions. See Module 34 page 34-3.

The current dimensioning style willappear in the Dimensioning toolbar. Aquick way to check or change thecurrent dimensioning style is with thedrop-down menu. Try to get into the

habit of using this toolbar menu to insert yourdimensions as it will speed up your productivity.

2004-2008

2000-2002

AutoCAD Command: DIMLINEARThe DIMLINEAR command is used to insert a lineardimension. A linear dimension is a dimension that is eitherhorizontal or vertical.

Shortcut: DIMLIN

2004-2008

2000-2002



3/18

AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-09-13

AutoCAD Command: DIMALIGNEDThe DIMALIGNED command is used to insert an aligneddimension.

Shortcut: DIMALI

2004-2008

2000-2002

AutoCAD Command: DIMANGULARThe DIMANGULAR command is used to insert an angulardimension.

Shortcut: DIMANG

2004-2008

2000-2002

The fastest way to dimension an object is to dimension it very quicklyinserting all the dimensions required. When all the dimensions are in,change them using the Properties window and the STRETCH command.

Don't try to fix the dimensions as you insert them.

35 - 3

http://www.abbyy.com/buyhttp://www.abbyy.com/buyhttp://www.abbyy.com/buy


4/18


AutoCAD Command: DIMDIAMETERThe DIMDIAMETER command is used to insert a diameterdimension.

Shortcut: DIMDIA

2004-2008

2000-2002

AutoCAD Command: DIMRADIUSThe DIMRADIUS command is used to insert a radius dimension.

Shortcut: DIMRAD

2004-2008

2000-2002

When AutoCAD finds the dimension or measures the object in adimensioning command, it does not display the actual number. The symbol is displayed. This symbol means default or the actual measurement. If

you want to add the text REF after the real measurement, enter it as : REF.



5/18


Inserting Linear, Aligned, Angular, Diameter and Radius Dimensions

Step 1 Open the drawing AutoCAD 2D

Workalong 34-1 that you completed inModule 34. See Figure Step 1.

Step 2 Save and name the drawing

AutoCAD 2D Workalong 35-1.

Step 3 Enable the

display of the Dimension Figure Step 1toolbar. Set thedimensioning style Module English as the current

35 - 5

Figure Step 3 dimensioning style as shown in Figure Step 3.

Step 4 Enter the system variable shown below to enable associative dimensions. For

more information, see Module 34 page 34-3.

If you are using 2002-2008, set the system variable DIMASSOC as follows:

Command: DIMASSOCEnter new value for DIMASSOC : 2

If you are using 2000-2000i set the system variable DIMASO as follows:Command: DIMASOEnter new value for DIMASO : ON

Step 5 Set layer Dimension as the current layer.

Step 6 Enter the DIMLIN command shown below to insert a linear dimension. See

Figure Step 6.

Command: DIMLIN

Specify first extension line origin or : (end) P1

Specify second extension line origin: (end) P2(Ensure to snap to the ends of the lines.)

Specify dimension line location or [Mtext/Text/Angle/Horizontal/Vertical/Rotated]: P3(You can place the location of P3 by eye. Try to match the figure the best you can.)

Dimension text = 4.50Command:

Figure Step 6

...continued on page 35-6



6/18


Inserting Linear, Aligned, Angular, Diameter and Radius Dimensions - Continued

Step 7 Using what you just learned,

add the linear dimensions to matchFigure Step 7.

Hint: Select the end of the

center mark Figure Step 7

Step 8 Enter the DIMALI command shown below to insert an aligned dimension. See

Figure Step 8.

Command: DIMALI

Specify first extension line origin or : (end) P4Specify second extension line origin: (end) P5

Specify dimension line location or [Mtext/Text/Angle]: P6Dimension text = 4.66

Command:

Figure Step 8




7/18

AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-09-13 35 - 7


Step 9 Using what you just learned, add the

aligned dimensions to match Figure Step 9A. Yourdrawing should appear similar to Figure Step 9B.

Figure Step 9B

Step 10 Enter the DIMDIA command shown

below to insert an diameter dimension as shown in Figure Step 9A

Figure Step 10A. Your drawing should now appear similar to Figure 10B.

Command: DIMDIA

Select arc or circle: P7Dimension text = 1.00Specify dimension line location or [Mtext/Text/Angle]: P8Command:

Figure Step 10A

...continued on page 35-8 Figure Step 10B



8/18



Step 11 Enter the DIMRAD command shown below to insert an radius dimension. See

Figure Step 11.

Command: DIMRAD

Select arc or circle: P9Dimension text = 2.56

Specify dimension line location or[Mtext/Text/Angle]: P10

Command:

Step 12 Using what you just

learned, add the radiusdimension to match FigureStep 12A. Your drawingshould appear similar toFigure Step 12B.

Figure Step 11

Figure Step 12B

Figure Step 12A

Step 13 Enter the DIMANG command

shown below to insert an angulardimension. See Figure Step 13.

Command: DIMANG

Select arc, circle, line, or :P11

Select second line: P12Specify dimension arc line location or[Mtext/Text/Angle]: P13Dimension text = 75d0'0"Command:


Dimensioning - Part 2 The CAD Guys Ltd. Copyright 1993 - 2007

Figure Step 13

Module 35


9/18



Step 14 Using what you just learned, add the angular dimension to match Figure Step

14A. Your drawing should appear similar to Figure Step 14B.

Figure Step 14A

Figure Step 14BAuthors Comments:

To make corrections to inserted associative or non-associative dimensions, change theproperties of the dimension using the Properties window.

Figure Step 15A

Step 15 Open the Properties window and

select the aligned dimension shown in FigureStep 15A. In the Text override property, enter REF. The dimension should now appear asshown in Figure Step 15B.



Figure Step 15B

The CAD Guys Ltd. Copyright 1993 - 2007 Module 35


10/18



Step 16 Select the aligned dimension shown in Figure Step 16. Change the property Ext

Line 2, to Off. This will turn off the display of one of the extension lines since the extension

line is on an object line. Depending on the order you used when inserting the dimension,

you may have to change Ext Line 1.

Figure Step 16

Step 17 Select the radius dimension shown in Figure Step 17. In the Center mark

property, set it to None.

Figure Step 17




11/18



Step 18 Select the radius dimension shown in Figure Step 18. In the Text override

property, enter 2.56 R.

Figure Step 18

Step 19 Select the diameter dimension shown in Figure Step 19. In the Text override

property, enter 1.00 DIA,.

Figure Step 19




12/18



Step 20 Change the properties of

any other dimension until thedimensions on your drawing match

Figure Step 20.

...continued on page 35-13 Figure Step 20

Object Snap Modes for all Objects

Modes

Nearest

Abbreviations

Nea

Icon Marker The AutoCAD Object

AutoCAD Command: QLEADERThe QLEADER command is used to a leaderdimension.

Shortcut: none

2004-2007

2000-2002

For AutoCAD 2008, you have to

enter this command on theCommand line.



13/18



Step 21 Enter the QLEADER

command shown below and selectthe Setting option. It will open the

Leader Setting dialogue box.Figure Step 21 shows theAnnotation tab. Ensure yourdialogue box matches the settingsin the figure.

Command: QLEADER

Specify first leader point, or [Settings]: SCommand:

Figure Step 21

Step 22 Select the Leader Line

and Arrow tab as shown in Figure

Step 22. Ensure your dialoguebox matches the settings in thefigure.

Figure Step 22

Step 23 Select the Attachment

tab as shown in Figure Step 23.Ensure your dialogue box matches

the settings in the figure.



Figure Step 23

The CAD Guys Ltd. Copyright 1993 - 2007 Module 35


14/18



Step 24 Enter the QLEADER command

shown to insert the leader shown in FigureStep 24.

Command: QLEADER

Specify first leader point, or [Settings] :(near) (nea) P13

(Using the Near osnap mode. see page 35-12.)Specify next point: P14Specify next point: P15Specify text width :Enter first line of annotation text :

MATCHING EDGE

Enter next line of annotation text:Command:

Figure Step 24

Step 25 Using what you just

learned, add the leader CircleA and START X5.5Y4.5 asshown in Figure Step 25.

Figure Step 25

Step 26 Your drawingshown now appearsimilar to Figure Step 26.Save and close thedrawing.

Figure Step 26



15/18


The snap mode nearest can be used for many

purposes while drawing in AutoCAD. If you wantto snap to an object but not any particular locationon that object, use this snap mode.

The Key Principles in Module 35

1. When AutoCAD finds the dimension or measures the object in a dimensioning

command, it does not display the actual number. The symbol is displayed. Thissymbol means default or the actual measurement.

35 - 15

2. To make corrections to inserted associative or non-associative dimensions, change the

properties of the dimension using the Properties window.



16/18


Lab Exercise 35-1

Drawing Specifications

Time Allowed: 40 Min.

Name Template Units Text Style Font

AutoCAD 2D Lab 35-1 N/A Millimeters N/A N/A

Note: Color, Linetype, and Lineweight are all ByLayer unless otherwise instructed.

Layering Scheme

Objects on Layer Name Color Linetype Lineweight

Titleblock Text

Instructions:

Titleblock Text White/Black Continuous N/A

1. Open the drawing AutoCAD 2D Lab 34-1 and save it asAutoCAD 2D Lab 35-1.

2. Create a dimensioning style named: Lab 35-1 English. Start withStandard.

3. Set the necessary variables to make the dimension appear as

best you can to match the drawing below.4. On layer Dimension insert the dimensions shown below.AutoCAD 2002 to 2008 - Insert all the dimensions shown belowas associative dimensions.AutoCAD 2000-2000i - insert non-associative dimensions.

5. Using the Properties box, correct all dimensions.6. Complete the Titleblock.

Completed Drawing



17/18


Lab Exercise 35-2



Name Template Units Text Style Font

AutoCAD 2D Lab 35-2 N/A Millimeters N/A N/A


Layering Scheme


Construction Objects

Dimensions

Instructions:

Construction

Dimension

253

Blue

Continuous

Continuous

N/A

N/A


2. Create a dimensioning style named: Lab 35-2 Metric. Start withISO-25.

3. Set the necessary variables to make the dimension appear asbest you can to match the drawing below.

4. On layer Dimension insert the dimensions shown below.AutoCAD 2002 to 2008 - Insert all the dimensions shown belowas associative dimensions.AutoCAD 2000-2000i - insert non-associative dimensions.

5. Using the Properties box, correct all dimensions.6. Complete the Titleblock.

Completed Drawing



18/18


Lab Exercise 35-3



Name

AutoCAD 2D Lab 35-3

Template

N/A

Units

Inches

Text Style

N/A

Font

N/A


Layering Scheme


Construction Objects

Dimensions

Instructions:

Construction

Dimension

253

Blue

Continuous

Continuous

N/A

N/A


2. Create a dimensioning style named: Lab 35-3 English. Start withStandard.

3. Set the necessary variables to make the dimension appear as bestyou can to match the drawing below.

4. On layer Dimension insert the dimensions shown below.AutoCAD 2002 to 2008 - Insert all the dimensions shown below asassociative dimensions.

AutoCAD 2000-2000i - insert non-associative dimensions.5. Using the Properties box, correct all dimensions.6. Complete the Titleblock.

Completed Drawing


autocad 2d module 35 pdf

Documents