Category Archive for: Using Dimensions

Adding Tolerance Notation

In mechanical drafting, tolerances are a key part of a drawing’s notation. They specify the allowable variation in size and shape that a mechanical part can have. To help facilitate tolerance notation, AutoCAD provides the Tolerance command, which offers common ISO tolerance symbols together with a quick way to build a standard feature control symbol. Feature control symbols…

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Skewing Dimension Lines

At times, you may find it necessary to force the extension lines to take on mangle other than 90° to the dimension line. This is a common requirement of isometric drawings, where most lines are at 30° or 60° angles instead of 90 degree .To fadlitate nonorthogonal dimensions like these, AutoCAD offers the Oblique option. . Choose Dimension >…

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Adding a Note with an Arrow

Finally, there is the Dimension > Leader option, which allows you to add a note with an arrow pointing to the object the note describes. Click the Leader tool on the Dimension toolbar, or enter Le or select Dimension > Leader from the pull-down menu. At the Specify first leader point, or [Settings]<Settings>: prompt, pick a point near the…

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Dimensioning Nonorthogonal Objects

So far, you’ve been reading about how to work with linear dimensions. You can also dimension nonorthogonal objects, such as circles, arcs, triangles, and trapezoids. In this section, you will practice dimensioning nonorthogonal objects by drawing an elevation of a window in the set of plans for your studio apartment building. You’ll start by setting up the drawing, then…

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Making Minor Adjustments to Dimensions Using Grips

The definition points, whose location you can see through their grips, are located on their own unique layer called Defpoints. Definition points are displayed regardless of whether the Defpoints layer is on or off. To give you an idea of how these definition points work, try the following exercises, which show you how to directly manipulate the definition points. With…

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Editing Dimensions

As you begin to add more dimensions to your drawings, you will find that Auto- CAD will occasionally place a dimension text or line in an inappropriate location, or you may need to make a modification to the dimension text. In this section, you’ll take an in-depth look at how dimensions can be modified to suit those special…

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Drawing Linear Dimensions

The most common type of dimension you’ll be using is the linear dimension. The linear dimension is an orthogonal dimension measuring the width and length of an object. AutoCAD offers three dimensioning tools for this purpose: Linear (Dim-linear), Continue (Dimcont), and Baseline (Dimbase). These options are readily accessible from the Dimension toolbar or the Dimension pull-down menu. Finding…

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Creating a Dimension Style

Dimension styles are similar to text styles. They determine the look of your dimensions as well as the size of dimensioning features, such as the dimension text and arrows. You might set up. a dimension style to have special types of arrows, for instance, or to position the dimension text above or in line with the dimension line.…

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Using Dimensions

Before you determine the dimensions of a project, your design is in flux and many questions may be unanswered. Once you begin dimensioning, you will begin to see if things fit or work together. Dimensioning can be crucial to how well a design works and how quickly it develops. The dimensions answer questions about code conformance if you are…

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