autocad: secrets every user should know chapter 4 – applying graphics standards
TRANSCRIPT
AutoCAD: Secrets Every User Should Know
Chapter 4 – Applying Graphics Standards
Dimensions
• Anonymous Blocks– Defined by AutoCAD– Names begin with *D– Not listed as blocks
• Don't Explode– Can't redefine– Won't update with edits
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Dimensions
• Associativity
• DIMASO Is the Old Variable
• DIMASSOC Is the New0 All dimension exploded (DON’T)
1 Dimensions are blocks but associated only with defpoints
2 Dimensions associated with geometry, even when in Paper Space
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Dimensions
• Default Dimension Style– Imperial: STANDARD– Metric: ISO-25
• Neither One Meets Standards
• Use a Different Name for Your Dimension Styles
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Dimensions
• Custom Arrow Head– Draw one unit long, pointing right– Create a block with point as
insertion– Select "User Arrow" in style
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Dimension Styles
• Decimal Inch– Dimension Style Manager
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Dimension Styles
• Decimal Inch– Lines tab
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Dimension Styles
• Decimal Inch– Symbols and Arrows tab
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Dimension Styles
• Decimal Inch– Text tab
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Dimension Styles
• Decimal Inch– Fit tab
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Dimension Styles
• Decimal Inch– Primary Units tab
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Dimension Styles
• Decimal Inch– Alternative Units tab
• Seldom used• Not allowed on military spec
drawings• When used, generally scale 25.4
– Tolerances tab• Use when tolerance applied• Classes of fit
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Dimension Styles
• Decimal Inch– Child variations
• Radius• Diameter
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Dimension Styles
• Decimal Inch– Child variations
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Dimension Styles
• ASME Metric and ISO– Start with decimal inch– Soft conversions
• 0.04 is approximately 1mm• 0.0625 (1/16") approximately 1.5mm• 0.125 (1/8") approximately 3mm• 0.25 (1/4') approximately 6mm• 0.375 (3/8") approximately 9mm• 0.5 (1/2") approximately 12mm
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Dimension Styles
• Architectural– Lines tab
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Dimension Styles
• Architectural– Symbols and Arrows tab
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Dimension Styles
• Architectural– Text tab (city blueprint, country blueprint,
hand1, or romans
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Dimension Styles
• Architectural– Fit tab
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Dimension Styles
• Architectural– Primary Units tab
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Dimension Styles
• Architectural– Alternate Units tab
• Seldom used
– Tolerances tab• Not Used
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Dimension Styles
• Architectural– Child variations
• Radius, Diameter, and Linear
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Dimension Styles
• Architectural– Linear Text tab
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Dimension Styles
• Architectural– Linear Fit tab
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Dimension Styles
• Civil Surveying– Lines tab
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Dimension Styles
• Civil Surveying– Text tab
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Dimension Styles
• Civil Surveying– Using on drawing
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Dimension Styles
• Civil Surveying– Using on drawing
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Dimension Rules
• Common Errors
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Dimension Rules
• Acceptable Application
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Text
• Two types of fonts– Shape fonts SHX
• Vector-based AutoCAD
– TrueType fonts (TTF)• Raster-based Windows
• Letter Height– General: 0.12", 3mm– Titles: 0.24", 6mm
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Text
• Don't Use Name “Standard”
• Acceptable Fonts - Mechanical– NOT txt.shx– Romans.shx
• Acceptable Fonts - Architectural– Romans.shx– Blueprint font
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Linetypes and Weights
• Hidden Line Conventions
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Linetypes and Weights
• Center Lines and Marks– Often incorrect in AutoCAD
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Linetypes and Weights
• Center Lines and Marks– Use DCE for proper marks and
editing without exploding
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Linetypes and Weights
• Circular Center Mark– ARRAY them yourself
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Linetypes and Weights
• Lineweights– Object lines
• Thick (0.4mm - 0.5mm)
– Other lines• Thin (0.2mm - 0.25mm)
– Architectural• May have four to seven lineweights
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AutoCAD Defaults
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Applying Standards
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Template Drawing Location
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Use QNEW
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Contents of Template File
• Layers– Colors, linetypes, lineweights– Layer filters, saved states
• Dimension Style
• Limits and Units
• Text Styles ( not STANDARD)
• General Block Definitions
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Contents of Template File
• Views and Viewports
• Layouts for Each Sheet Size
• Default Plot Styles/Pen Styles
• System Variables (Not Registry)– AUPREC and LUPREC– LTSCALE, PSLTSCALE – MEASUREMENT– And so on
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Layer Naming - Commercial Architecture
• AIA– Discipline– Major group– Minor group– Status– User defined
• Example
A-WALL-DIMS-NEWW
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Layer Naming - Residential Architecture
• Can use AIA
• Might Have Simpler Standard
For Example
FL1-DIM
FL2-DIM
FND-DIM
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Layer Naming General
• Reserve Layer 0 for Defining Blocks
• Use Part-Based Layer Names for Assemblies
• Use Logical Field Names– Easier to manage with wildcards
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Click to edit Master title style
• Click to edit Master text styles– Second level
• Third level– Fourth level
» Fifth level
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