AutoCAD Lecture 3 PDF

Dimension LECTURE 3 Class summary We have been dimensioning the same way in AutoCAD software for what seems like 100 years. Now you can finally reduce steps and accelerate your dimensioning with AutoCAD software’s new and improved dimensioning tools. Instead of using different commands to create...

Dimension LECTURE 3 Class summary We have been dimensioning the same way in AutoCAD software for what seems like 100 years. Now you can finally reduce steps and accelerate your dimensioning with AutoCAD software’s new and improved dimensioning tools. Instead of using different commands to create different types of dimensions, you will learn how the multipurpose DIM command anticipates the type of dimensions you want to create, eliminating steps and making you more productive than ever before. Discover how to create associative centerlines and center marks that automatically adjust as you make changes to your drawings. You will also learn how to automatically place dimensions on the proper layer. As Oliver Wendell Holmes, Jr., said, “A mind that is stretched by a new experience can never go back to its old dimensions.” This session features AutoCAD and AutoCAD LT. AIA Approved. Key learning objectives At the end of this class, you will be able to: ▪ Create any type of dimension in AutoCAD ▪ Dimension using the single DIM command ▪ Create and modify associative centerlines and center marks ▪ Edit dimensions and modify dimension components efficiently Introduction Types of Dimensions ▪ Linear ▪ Radial (radius, diameter, jogged) ▪ Angular ▪ Ordinate ▪ Arc length  Dimensioning the old way ▪ DIMLINEAR ▪ DIMALIGNED ▪ DIMANGULAR ▪ DIMARC ▪ DIMRADIUS ▪ DIMDIAMETER ▪ DIMJOGGED ▪ DIMORDINATE © 2016 2016 Dimensioning the new way in AutoCAD ▪ DIM Automatically recognizes objects beneath the cursor and defaults to the appropriate dimension type. Dimensioning the new way in AutoCAD You may still need to specify certain types of dimensions BUT In most cases you can create multiple dimensions with minimal input. AND Dimensions appear on the appropriate layer Elements of a dimension ▪ Dimension text ▪ Dimension line ▪ Arrowheads ▪ Extension lines ▪ Center mark/centerline All part of a single associative dimension object Extension lines are special By default, they are ignored by OSNAP Controlled in Options The new DIM tool ▪ Home ribbon ▪ Annotate ribbon The old dim tools are still around DO NOT USE THEM They aren’t automatic and do not place dimensions on the DIMLAYER Also remember Defpoints Defpoints layer created when you add an associative dimension ▪ Stores invisible dimension nodes ▪ Defpoints do not print ▪ Cannot remove this layer Creating Dimensions DIM can create nearly any type of dimension ▪ Linear ▪ Angular ▪ Radial ▪ Arc length ▪ Ordinate Remains active until stopped Creating Linear Horizontal, Vertical, and Aligned Dimensions ▪ By default, linear dimensions align with object ▪ Press SHIFT to force dimension to be horizontal or vertical ▪ Select extension line origins to dimension across multiple objects Creating Linear Baseline Dimensions Baseline dimension – begins from same extension line origin as an existing dimension 1. Baseline option 2. Select baseline origin 3. Adjust Offset as needed By default, baseline dimension takes on dimension style and layer of the extension line you select (controlled by DIMCONTINUEMODE) Creating Linear Continued Dimensions Continued dimension – starts from an extension line of an existing dimension 1. Continue option 2. Select extension line By default, baseline dimension takes on dimension style and layer of the extension line you select (controlled by DIMCONTINUEMODE) Creating Angular Dimensions Angular dimension – 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 you select is an angular dimension Creating Angular Continued Dimensions ▪ Identical to linear continued but the baseline you select is an angular dimension Creating Radial Dimensions Radial dimension – measures the radii or diameter of arcs and circles (optional centerline or center mark) 1. Automatic on hover 2. May have to select option Symbol ( or R) and center mark defined as part of dimension style Creating Arc Length Dimensions Arc length dimension – measures distance along an arc or polyline arc 1. Choose the arc Length option Hat/cap symbol () defined as part of dimension style Creating Jogged Radius Dimensions Jogged or foreshortened radius dimension – measures radius of arc when center cannot be shown at its true location 1. Choose the Jogged option 2. Select arc 3. Select center location 4. Select dimension line location 5. Select jog location Creating Ordinate Dimensions Ordinate dimension – measures perpendicular distance (X or Y value) from an origin (datum) point to a feature 1. Set UCS first 2. Choose Ordinate option Adding Center Marks ▪ Created using the CENTERMARK command. ▪ Added at the center of an arc or circle. ▪ Associated with the objects they annotate. ▪ Different than center marks placed with dimension. ▪ Consist of two elements: ▪ Center cross ▪ Extension lines ▪ Controlled using new sysvars Adding Centerlines ▪ Created using the CENTERLINE command ▪ Used as reference to axes of symmetry ▪ Associated with the objects they annotate ▪ Includes two parts: ▪ Calculated length ▪ Overshoot ▪ Controlled using new system variables Adding and Modifying Dimension Text Dimension Text ▪ Created automatically while dimensioning ▪ Can include prefix/suffix/other user-supplied text ▪ Treated as a single string of text ▪ You can control dimension text formatting When using DIM command ▪ Mtext option – use Text Editor ribbon ▪ Text option– change actual dimension text ▪ Text aNgle option – change angle of text EXPLAIN HOW TO SAVE AUTOCAD TO PDF