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What is the primary new command used for dimensioning in AutoCAD?
What can the DIM tool create?
Nearly any type of dimension including Linear, Angular, Radial, Arc length, and Ordinate.
Extension lines are ignored by OSNAP by default.
True
What type of dimension measures the angle between two non-parallel lines?
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Match the following dimension types with their definitions:
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What layer is created when you add an associative dimension?
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The old dimensioning tools in AutoCAD are considered more efficient than the new DIM tool.
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What method can be used to create Baseline Dimensions?
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An Angular Continued Dimension is identical to a linear continued dimension but is based on an __________ dimension.
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What is the primary purpose of the Jogged radius dimension?
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Centerlines in AutoCAD are used as references to axes of symmetry.
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What command is used to create center marks in AutoCAD?
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An ordinate dimension measures the perpendicular distance from a datum point to a feature in either the X or Y __________.
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Match the following dimension types with their descriptions:
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Which dimension types are included in the new AutoCAD dimensioning tools?
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The multipurpose DIM command allows users to specify the type of dimension every time they create one.
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What are associative centerlines and center marks in AutoCAD meant to do?
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The old dimensioning tools in AutoCAD included commands like DIMLINEAR and ________.
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Match the dimensioning command with its corresponding description:
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Which of the following elements is NOT part of a dimension?
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Defpoints layer cannot be removed in AutoCAD.
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What is the main function of extension lines in dimensioning?
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A ________ dimension begins from the same extension line origin as an existing dimension.
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Match the following types of dimensions to their descriptions:
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What must be selected first when creating a continued dimension?
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What dimensioning type measures angles along an arc?
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The old dimensioning tools in AutoCAD automatically place dimensions on the DIMLAYER.
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Study Notes
Introduction
- New and improved dimensioning tools in AutoCAD accelerate dimensioning
- Uses a single "DIM" command to automatically recognize different types of dimensions
- Features include associative centerlines and center marks that automatically adjust as you make changes to your drawings
- Automatically places dimensions on the proper layer
Types of Dimensions
- Linear
- Radial (radius, diameter, jogged)
- Angular
- Ordinate
- Arc length
The Old Way of Dimensioning
- Previous versions of AutoCAD required multiple commands for each dimension type:
- DIMLINEAR
- DIMALIGNED
- DIMANGULAR
- DIMARC
- DIMRADIUS
- DIMDIAMETER
- DIMJOGGED
- DIMORDINATE
Dimensioning the New Way in AutoCAD
- Uses the "DIM" command to automatically recognize objects and default to appropriate dimension types.
- Eliminates repetitive steps and increases productivity.
- Dimensions appear on the appropriate layer by default.
Elements of a Dimension
- Dimension text
- Dimension line
- Arrowheads
- Extension lines
- Center mark/centerline
Extension Lines
- Extension lines are a special part of a dimension object, which are ignored by OSNAP by default.
- They are controlled in the Options menu.
The New DIM Tool
- Found on the Home and Annotate ribbons in AutoCAD.
The Old Dim Tools
- They are still available but should not be used, as they are not automatic and do not place dimensions on the DIMLAYER layer.
Defpoints
- Defpoints layer is created when you add an associative dimension.
- Stores invisible dimension nodes that do not print.
- Cannot remove this layer.
Creating Dimensions
- The "DIM" command can create nearly any type of dimension:
- Linear
- Angular
- Radial
- Arc length
- Ordinate
- Remains active and continues to create dimensions until stopped.
Creating Linear Horizontal, Vertical, and Aligned Dimensions
- By default, linear dimensions align with the object.
- Press SHIFT to force the dimension to be horizontal or vertical.
- Select extension line origins to dimension across multiple objects.
Creating Linear Baseline Dimensions
- Begins from the same extension line origin as an existing dimension.
- Select the Baseline option, followed by the baseline origin and adjust the offset as needed.
- Takes on the dimension style and layer of the extension line you select by default (controlled by DIMCONTINUEMODE).
Creating Linear Continued Dimensions
- Starts from the extension line of an existing dimension.
- Select the Continue option, followed by the extension line.
- Takes on the dimension style and layer of the extension line you select by default (controlled by DIMCONTINUEMODE).
Creating Angular Dimensions
- Measures the angle between two non-parallel lines, the angle subtended by an arc, or the angle formed by three selected points.
- Three ways to create:
- Pick an arc
- Pick 2 lines
- Pick 3 points
Creating Angular Baseline Dimensions
- Identical to linear baseline, but the baseline selected is an angular dimension.
Creating Angular Continued Dimensions
- Identical to linear continued, but the baseline selected is an angular dimension.
Creating Radial Dimensions
- Measures the radii or diameter of arcs and circles with optional centerline or center mark.
- Symbol ( or R) and center mark are defined as part of the dimension style.
Creating Arc Length Dimensions
- Measures distance along an arc or polyline arc.
- Hat/cap symbol () is defined as part of the dimension style.
Creating Jogged Radius Dimensions
- Measures the radius of an arc when the center cannot be shown at its true location.
- Select the Jogged option, the arc, center location, dimension line location, and jog location.
Creating Ordinate Dimensions
- Measures perpendicular distance (X or Y value) from an origin (datum) point to a specific point on the object.
- Choose the ordinate option, origin point, object, and select X or Y orientation.
Dimensioning the New and Improved AutoCad Way
- AutoCAD's new dimensioning tools streamline the process, reducing steps and making it more efficient.
- The DIM command automatically determines the type of dimension you need based on object selection, eliminating the need for numerous commands.
- Dimensions appear on the relevant layer.
- Old dimensioning commands (DIMLINEAR, DIMALIGNED, DIMANGULAR, etc.) are still available, but the automatic DIM command is preferred for improved efficiency and automation.
- Defpoints layer is created when you add an associative dimension, holding invisible dimension nodes. Defpoints do not print.
- The DIM command can create various dimension types: linear, angular, radial, arc length, and ordinate.
- For linear dimensions:
- Press SHIFT to force horizontal or vertical dimensions.
- Select extension line origins to dimension across multiple objects.
- Baseline dimension starts from the same extension line origin as an existing dimension.
- Continued dimension starts from the extension line of an existing dimension.
- Angular dimension measures the angle between lines, arcs, or three selected points.
- Radial dimension measures radii or diameters of arcs and circles.
- Arc length dimension measures distance along an arc or polyline arc.
- Jogged radius dimension measures radius when the center cannot be shown at its true location.
- Ordinate dimension measures perpendicular distance from an origin point to a feature.
- Center marks are created using the CENTERMARK command, added at the center of arcs, circles, and associated with their object.
- Centerlines are created using the CENTERLINE command, used as reference to axes of symmetry, and associated with their objects.
- Dimension text is created automatically, can include prefix/suffix, and can be formatted.
- The Mtext option and Text option allow editing and changing the dimension text.
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Description
Explore the new and improved dimensioning tools in AutoCAD that streamline the process of adding dimensions to your drawings. This quiz covers the various types of dimensions and compares the new one-command approach to the previous methods. Test your knowledge and improve your AutoCAD skills with this engaging quiz.
