dimensions lesson _1_.pdf
TRANSCRIPT
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AutoCAD is a CADD(Computer Aided Design & Drafting)
software application for Version 2014 for Windows 7
Layla Kaissy
Humber College
2013/2014
ARCHITECTURAL CADD 1ARC 733
FUNDAMENTALS OF AUTOCAD
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LAYLA AL KAISSY
HUMBER COLLEGE
FALL 2015
An ACCRONYM for Computer Aided Design & Drafting.
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ACKNOLEDGEMENT
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Much of the material have been sourced from :AutoCAD Bible 2013 Author: Ellen Finkelstein Learning AutoCAD 2010, Volume 1 & 2 by Autodesk AutoCAD for Interior Designers by AutodeskAutoCAD Services & Support ,2011http://www.dreamstime.com/
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3After completing this lecture you will be
able to:
Define and save dimension styles
correctly based on architectural
drafting standards and intended plot
scale.
DIMENSIONS Learning Objectives
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Dimensions Lecture Outline
1. Dimension
2. Dimension Styles
3. Editing Dimensions
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Dimensions- General
Dimensions are used on drawings to interpret the size and specifications.
Dimensions indicate the measurements of the created models.
Dimensions and texts are usually added after completing the drawing.
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Furniture Stencil
scale 1:50
Daniel Libeskind Design of Toronto
Museum AutoCAD drawings
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Dimensions OptionsBefore dimensioning any object in the drawing, we have to decide what option is appropriate.
AutoCAD provides many dimensioning options, according to different kinds of geometry.
Linear Dimensions horizontal or vertical elements
Aligned Dimensions angled elements
Angle Specifies angle
Continue dimension Creates a string of dimensions
Baseline Provides overall dimensions
Radius Dimensions radii of arcs, circles and ellipses
Diameter Dimensions diameters of arcs, circles and ellipses
Center mark Provides a mark signifying the center of an arc, circle and
ellipse
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Creating Dimensions Dimensions are a very important element of Annotation.
They show the measurements and illustrate how your drawings meet the specifications.
We will learn how to :
Create different types of dimensions on linear objects. Create different types of dimensions on curved objects. Enhance dimensions for clarity of purpose.
Creating Dimensions on Linear ObjectsLinear DimensionCommand Access
Command line: DIMLINEAR, DIMLINMenu Bar: Dimension > LinearRibbon: Annotate tab > Dimensions panel > Linear
Command Options (Sub-Prompt)
Specify first extension line origin or < select object> Select one end of the line to be dimensioned. Use Osnap for precision. OR Hit the ENTER, and select the line to be dimensioned Specify the second extension line origin by Picking the other end of the line to be
dimensioned. Use Osnap for precision.
Specify dimension line location OR (Mtext/ Text/ Angle/Horizontal/Vertical/Rotated )
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Dimension Styles It is very important to understand how to create and modify dimension styles .
How to create and format and dimension styles to easily manage dimensions.
Definition: Dimension style is a group of dimension settings or variables that
control how dimension appear. You can use more that one dimension style in
a drawing.
Command Access
Command line: DIMSTYLEMenu Bar: Format > Dimension StyleRibbon: Annotate tab > Dimensions panel > Dimension Style
Dimension Style Manager
The Dimension Style Manager displays all the dimension styles available in the
drawing, in addition you can use all option in the dim. style manager to
Create a new dimension styles Modify an existing style. Override a style Compare styles Set a style current.
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Object line
4500
Dimension Text
Extension line
Dimension line
Arrow head
A gap that separate
extension line from
object- line
PARTS OF DIMENSIONS
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Two important characteristics of Dimensions:
Dimensions are blocks: Blocks are group of objects that is working as one object
Dimensions are associative: Association connects Dimensions and objects. If you change the object sixe , dimensions changes
automatically
Dimensions Preparation:
Create a layer for your dimensions. Choose a contrast color.
You may create a special dimension layer that you may freeze/thaw or on /off... For example DIMN-ELEC
Set your height in the text style to zero, will allow you to set text height according to your needs. If you specify a fixed height in
text style, that height will overrides any height that you specify.
TIPS
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Dimension Style Manager
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New Dimension Style Dialog Box
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5
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New Dimension Style Dialog Box
1. Select New from the Dimension Style Manager
2. Enter a new style name based on an existing dimension style that you choose from list
3. A new dimension style is typically used for all dimension
4. Check Annotative 6 to make all dimensions appear in consistent size when you have multiple viewports in the drawing layout.
5. Select Modify to access the same Dimension Style Options
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Dimension Style Options
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New Dimension Style Dialog Box
Lines Tab: Use this tab to adjust properties for the dimension and extension lines.
Symbols and Arrows: Use this tab to adjust the arrowheads, etc.
Text : Use this tab to adjust the text appearance, text placement, and the text alignment options
Primary Units Tab: Use this tab to set options for the primary units displayed on the dimensions, the primary units are always displayed and
they reflect the current drawing units setting.
Alternate Units Tab: Use this tab to show two measurement units, metric and Imperial.
Tolerances Tab: Use this tab to add tolerances to your dimensions. By adding tolerances to your dimensions, you are setting a valid range in
which that as-built measurement of the feature must be maintained in
order to ensure functionality.
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Dimension Style Guidelines
Dimension styles controls the appearance of dimension features. Dimension style options are based on general drafting standards. Only one dimension style can be current at a time. If you modify a dimension style, all dimensions using that style in
the drawing update automatically.
To set current or rename or delete a dimension style, select the name in the Dimension Style Manager, and right click to access these options.
You cannot delete a dimension style if it is current. The quickest way to make a new dimension style current is to
select it from the list in the Dimensions panel.
A new drawing based on the ACAD dwg. template will contain a Standard style and an Annotative style.
The Annotative dim. Style will display dimensions that are equal in size regardless of the viewport scale in the drawing Layout.
For non-annotative dimensions, you must set dimension scale equal to your plot scale.
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Editing Dimensions
There are a variety of ways to edit dimensions depending on what kind of
editing you need to do. You can:
1. Reposition dimensions using grips
2. Edit dimension features that override the dimension style
3. Change dimensions from one style to another
4. Edit the dimension text
5. Edit dimensions using grips
6. Dimedit commands.
Command AccessDimension Edit - Edit text
Command Line: DDEDIT
Pointing Device: Double click a text object.
1. You can use a Dimedit ( DDEDIT ) command to edit or override the dimension text measurement.
2. You can use a Dimtedit command to edit the position of the dimension text.
3. You can also right-click a selected dimension to access the Quick Properties or the Properties Palette where you can edit any dimension style features for the selected dimension.
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Questions
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