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Chapter 5 Dimensioning in AutoCAD. Topics. Dimensioning: Topics. Summary 5.1) Introduction 5.2) Dimension Commands 5.3) Dimension Style 5.4) Dimension Variables 5.5) The DIM Prompt 5.6) Associative Dimensions 5.7) Annotative Objects. Dimensioning in AutoCAD. Summary.

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Chapter 5 dimensioning in autocad

Chapter 5Dimensioning in AutoCAD

Topics


Dimensioning topics
Dimensioning: Topics

Summary

5.1) Introduction

5.2) Dimension Commands

5.3) Dimension Style

5.4) Dimension Variables

5.5) The DIM Prompt

5.6) Associative Dimensions

5.7) Annotative Objects



Summary
Summary

  • What will we learn in Chapter 5?

    • The skills necessary to dimension an orthographic projection.

  • Key points

    • By default, dimensions are associative. If you manually type in a dimension, the associativity is broken.


Dimensioning in autocad1

Dimensioning in AutoCAD

5.1) Introduction


Introduction
Introduction

  • AutoCAD automatically creates the dimensions and dimension text once a feature is selected.

  • Dimension appearance and properties may be adjusted in the Dimension Styles Managerwindow.


Dimensioning in autocad2

Dimensioning in AutoCAD

5.2) Dimension Commands



Leaders panel
Leaders Panel

Collect Multileaders

Align Multileader


Dimensioning in autocad3

Dimensioning in AutoCAD

5.3) Dimension Style


Dimension style
Dimension Style

  • The Dimension Style Manager is used to create:

    • New dimension styles,

    • set the current style,

    • modify styles,

    • set overrides on the current style,

    • and compare styles.

  • Access using: DDIM, DIMSTYLE or from the Dimensions panel


Multileader style
Multileader Style

  • The Multileader Style Manager is used to create:

    • New multileader styles,

    • set the current style,

    • and modify styles,

  • Access using: MLEADERSTYLE or from the Leaders panel.


Dimensioning in autocad4

Dimensioning in AutoCAD

5.4) Dimension Variables


Dimension variables
Dimension Variables

  • Dimension appearance may be modified by changing dimension variables.

    • These variables may be set in the Dimension Styles Manager.

  • It is not uncommon to change some of these variables on the fly within the Command window.


Dimension variables1
Dimension Variables

  • Commonly used dimension variables

    • DIMSCALE: This command sets the overall size or scale factor of the dimensions.

    • DIMTIX: Forces dimension text inside extension lines.

    • DDEDIT: Edits dimension text.

    • DIMCEN:Controls size of the center marks drawn by diameter and radial dimensions.

    • UPDATE: Applies the changes.

  • Other variables are given in section 5.4)


Dimensioning
Dimensioning

  • Creating and modifying dimensions.

Live Demonstration


Dimensioning in autocad5

Dimensioning in AutoCAD

5.5) The DIM Prompt


The dim prompt
The DIM Prompt

  • Within the Dim prompt (the dimension mode), you can type in dimensioning commands that allow you to create and modify dimensions.

    • DIM: Accessed the DIM prompt.

    • EXIT:Exits the DIM prompt.


Dimensioning in autocad6

Dimensioning in AutoCAD

5.6) Associative Dimensions


Associative dimensions
Associative Dimensions

  • Associative dimensions are associated (connected) with the dimensioned object.

    • If the object is changed, the associated dimension value will change.

Live Demonstration


Associative dimensions1
Associative Dimensions

  • Associativity is broken if...

    • You manually type in the dimension text

    • replace the dimension text

    • EXPLODE the dimension

  • Multileaders are not associative.


Dimensioning in autocad7

Dimensioning in AutoCAD

5.7) Annotative Objects


Annotative objects
Annotative Objects

  • Annotative objects support multiple viewport scales. (Dimension, text, hatches ...)

1:2 scale

1:1 scale


Annotative objects1
Annotative Objects

  • Annotative objects support multiple viewport scales. (Dimension, text, hatches ...)

1:1 scale

2:1 scale


Annotative objects2
Annotative Objects

  • Each supported scale adds to the file size.




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