5.4: Module 25 2D Drawings – Part 2

25

Module 25 2D Drawings – Part 2

Wally Baumback

Learning Outcomes

When you have completed this module, you will be able to:

1. Describe basic dimensioning, centerlines, and standard styles.
2. Describe and apply the STYLES EDITOR command to copy and edit standard styles to create your own dimension and text styles.
3. Describe and apply the RETRIEVE DIMENSION, CENTERLINES, and GENERAL DIMENSION commands to place model and drawing dimensions and centerlines on drawing views.
4. Describe how styles are exported out of and imported into drawing files.

Drafting Lesson: Basic Dimensioning Terms

Figure 25-1 shows the basic dimensioning terms that you will need to know when setting the standards for dimensioning style.

Figure 25-1
Basic Dimensioning Terminology [Click to see image full size]

Dimensioning

Dimensioning is the process of adding size descriptions to the orthographic views of the model that are placed on a drawing. Once a orthographic views of the model are dimensioned, the drawing sheet can then be plotted and used for construction or reference. Up to this point in the modules only shape and size descriptions have been added to the solid models that are been constructed by adding geometrical and dimensional constraints. Since Inventor knows the exact size of the solid models, the drafter/designer only has to control which dimensions are shown and where to position them.
Dimensioning is a complex subject, not difficult, but there is a lot to learn. Therefore, in the Inventor Modules, learning to control the appearance and location of the basic dimension types is taught. As the Inventor user gets more experience dimensioning he/she can experiment with some of the advanced dimensioning features.

Dimensioning Styles

A dimensioning style is a named set of variables or settings that controls the way the dimensions will appear on the drawing. There are many different settings in a dimensioning style so it will take the user some time to get used to setting them. Be patient and practice editing styles and inserting dimensions as often as possible.
Inventor comes with several preset dimensioning styles which are part of the template that was used when the drawing file was created. They can be edited but cannot be renamed. It is better to create a new style by copying an renaming one of the Inventor standards and make the necessary changes to it. After the editing is complete, name the style with an appropriate name and save it so that it can be identified and used again at a later date. Dimensioning styles can also be exported and imported from one drawing to another.

Text Styles

A text style is a named set of variables or settings that controls the way text will appear on a drawing. Inventor comes with several preset text styles which were part of the template that was used when the drawing file was created. Although they can be edited, they cannot be renamed. If changes are required, it is better to create a new text style by copying one of the Inventor standards and make the necessary changes to it. After the editing is complete name the style with an appropriate name and save it so that it can identified and used at a later date. Text styles can also be exported and imported from one drawing to another.

Centerlines

A centerline is used in technical drawings to indicate the location of the axis of symmetry. Placing centerlines on all objects that have a symmetrical shape will help others who are reading the drawing. The proper use of centerlines also cut down on the number of dimensions that are required on a drawing to fully describe the object.

Placing Dimensions

The two types dimensions that can placed on a drawing are model dimensions and drawing dimensions.

Model Dimensions

Model dimensions are the driven and driving dimensions that were placed in the 2D sketch when the model was being constructed. The RETRIEVE DIMENSION command is used to retrieve the dimensions from the model and display them on the drawing. If the driven dimensions in the original sketches are changed in the future, the model dimensions in the drawing will automatically change since they are showing the actual size of the model.

Drawing Dimensions

Drawing dimensions are dimensions that are placed in the drawing using the GENERAL DIMENSION command. Dimensions are placed exactly where they are located in the 2D sketch when the model was created. Inventor will obtain the actual sizes and if the model is changed in the future, the drawing dimensions will automatically change to reflect the new size of the model.

Inventor Command: STYLES EDITOR

The STYLES EDITOR command is used to create and/or edit the styles and standards used by a drawing file.

Shortcut: none

Inventor Command: RETRIEVE DIMENSIONS

The RETRIEVE DIMENSIONS command is used to retrieve model dimensions from the sketches used to create the solid model. Only dimensions that are parallel to the plane of the view will display. The user can select the dimensions that they want to display on the drawing.

Shortcut: none

Inventor Command: TEXT

The TEXT command is used to place text on the a drawing sheet. It uses the default text style when the text is inserted.

Shortcut: none

Drafting Lesson: Center Lines

In multiview drawings, the center line is used to indicate the location of the axis of symmetry. Placing centre lines on all objects that have a symmetrical shape will help the reader and save the you from inserting a lot of dimensions as you will see in future modules. Below are some examples of typical applications of the use of centre lines in a multiview drawing.

A ‘ C ‘ with an ‘ L ‘ through it is the symbol for a centre line. Center lines are drawn as repeating long and short lines. See Figure 37-2.

Figure 37-2

Figure 37-3 shows a centre line indicating the centre of the circle with two short lines called a center mark intersecting at the centre. Note in the right side view, the centre line follows the length of the cylinder.

Figure Step 37-3

When the symmetry ends, so does the centre line. Note how the centre line ends on the left side of the arc. See Figure 37-4

Figure Step 37-4

Figure 37-5 shows the centre lines along with the hidden lines that indicate a hole going through the object. The centre line on the top and bottom circles stops at the circle.

Figure Step 37-5

In Figure 37-6, note how centre lines are drawn for an array of circles.

Figure Step 37-6

There are four icons used to place centerlines on the drawing. In this module, you will be using three of them. The Center Mark, Centerline, and Centered Pattern icons are shown in Diagrams F1, G1 and H1. Diagrams F2, G2 and H2 show what centerline the applicable icon will place.

DIAGRAM F1

DIAGRAM F2

DIAGRAM G1

DIAGRAM G2

DIAGRAM H1

DIAGRAM H2

WORK ALONG: Creating Dimensioning and Text Styles

Step 1

Check the default project and if necessary, set it to: Inventor Course.

Step 2

Open the drawing file: Inventor Lab 24-1A.idw. (Figure Step 2)

Figure Step 2 [Click to see image full size]

Step 3

Enter the STYLES EDITOR command to open the Styles and Standard Editor dialogue box. Expand the children under the heading Dimension from the list of styles and standards on the left side of the dialogue box. The seven dimensioning styles listed are the styles that are already contained in your drawing. They were in the template file that you used when you created the drawing. (Figure Step 3)

Figure Step 3

Step 4

Right-click the dimensioning style: Default (ANSI). In the New Style Name dialogue box, enter the name: Modules in ANSI. Ensure that you enable the Add to Standard and then click OK. (Figure Step 4A and 4B)

Figure Step 4A

Figure Step 4B

AUTHOR’S COMMENTS: You are copying the Default ANSI (in) dimensioning style to create your own style. It is always best to copy from an existing style. That way, you get the existing standards and you only have to change the items that you require to suit your new style.

Step 5

Click the dimensioning style: Modules in (ANSI) in the style list on the left side of the dialogue box to make it the current style. Note that on the right side of the dialogue box your newly created style is listed at the top above the tabs. This indicates it can be edited in the dialogue box. Enable the Units tab. (Figure Step 5A and 5B).

Figure Step 5A

Figure Step 5B

Step 6

Change the Linear and Angular box to match the settings shown in the figure. (Figure Step 6)

Figure Step 6

Step 7

Enable the Display tab and if necessary, make any changes until it matches the figure. (Figure Step 7)

Figure Step 7

Step 8

Enable the Options tab and if necessary, make any changes until it matches the figure. (Figure Step 8)

Figure Step 8

Step 9

Enable the Notes and Leaders tab and if necessary, make any changes until it matches the figure. (Figure Step 9)

Figure Step 9

Step 10

Click the Save button to save the changes you made to the dimensioning style: Modules in ANSI. Click Done to close the dialogue box. (Figure Step 10)

Figure Step 10

MUST KNOW: The default dimension styles cannot be renamed nor should they be altered. It is always best to create your own style using a default style to copy from. After you edit it to make the changes to suit the required style, name and save the style. Pick an appropriate name so that you can easily find and use it in the future.

Step 11

Expand the children under the heading Text from the list of styles and standards on the left side of the dialogue box. The style names listed are the text styles that are already contained in your drawing. (Figure Step 11)

Figure Step 11

Step 12

Right click the style: Note Text (ANSI). In the right-click menu, select New Style. (Figure Step 12)

Figure Step 12

Step 13

This will open the New Style Name dialogue box as shown in the figure. Note that since the text style: Note Text (ANSI) was the current style, you will be starting with a copy of its settings. Enter the name: Modules Note Text (ANSI) and click OK. Ensure that Add to standard is enabled. (Figure Step 13)

Figure Step 13

Step 14

Make any changes necessary to match the figure. (Figure Step 14)

Figure Step 14

Step 15

Click the Save button to save the changes you made to the text style.

Step 16

Use what you learned earlier in the workalong, make the dimensioning style: Modules in ANSI the active style. (Figure Step 16)

Figure Step 16

Step 17

Enable the Text tab. Pull down the Primary Text Style pull-down box and select the text style: Modules Note Text (ANS)I. This will make it the default text style for the dimensioning style: Modules in ANSI. (Figure Step 17)

Figure Step 17

Step 18

The Text tab in the active dimension style: Modules in ANSI should appear as shown in the figure.

Step 19

Click the Done button and if you are asked to Save Edits, click Yes. (Figure Step 19)

Figure Step 19

Step 20

Save and close the drawing file.

WORK ALONG: Adding Annotation to the Drawing

Step 1

Check the default project and if necessary, set it to: Inventor Course.

Step 2

Open the drawing file: Inventor Lab 24-1A.idw.

Step 3

Click the Centerline icon to place the vertical centerline on the Top view. For the first point, snap to the midpoint of the line on the top of the view. For the second point, snap to the midpoint of the bottom line of the Top view. Move the cursor a short distance below the Top view and click it to indicate the distance the centerline is to go past the view. (Figure Step 3A, 3B, 3C, and 3D)

Figure Step 3A

Figure Step 3B

Figure Step 3C

Figure Step 3D

Step 4

Using what you just learned, place the centerline on the Front view. (Figure Step 4)

Figure Step 4

AUTHOR’S COMMENTS: Note that because the centerline in the Front view is so short, the break lines do not appear.

Step 5

Open the Style and Standard Editor dialogue box. On the left side, expand the children in the Center Mark heading. Select Center Mark (ANSI) to make it the current style. (Figure Step 5)

Figure Step 5

Step 6

Right-click the standard style: Center Mark (ANSI) and click New Style. In the New Style Name dialogue box, enter the name: Modules Center Line Short (ANSI). (Figure Step 6)

Figure Step 6

Step 7

Select the new style that you just created to make it the current style. Make the changes shown in the figure. (Figure Step 7)

Figure Step 7

Step 8

Select the centerline in the Front view. It will highlight. (Figure Step 8)

Figure Step 8

Step 9

With the centerline selected, look on the Inventor Standard pull-down menu. Note how it shows Standard as the centerline type for selected object. Select the centerline style: Modules Center Line Short ANSI. (Figure Step 9A and 9B)

Figure Step 9A

Figure Step 9B

USER TIP: When creating and dimensioning the 2D sketches in future models, keep in mind how the RETRIEVE DIMENSION command works. It retrieves both driven and driving dimensions that are parallel to the plane of each vew. After placing the driven dimension to constrain the sketch, add the necessary driving
dimensions so that when you create the drawing and dimension the model, it will retrieve all of the dimensions required. That way, you will may not have to place any general dimensions.

Step 10

Enter the RETRIEVE DIMENSION command and in the Retrieve Dimensions dialogue box, ensure that Select View icon is enabled. Select the Top view. (Figure Step 10)

Figure Step 10 [Click to see image full size]

Step 11

In the Select Source box, enable Select Parts. Select all objects. The dimensions that you inserted in the sketches that are parallel to the plane will display. (Figure Step 11)

Figure Step 11 [Click to see image full size]

Step 12

Ensure that the Select Dimension icon is enabled select the dimension(s) that are selected in the figure. (Figure Step 12)

Figure Step 12 [Click to see image full size]

AUTHOR’S COMMENTS: The dimensions that display on the view may be different then the ones shown here. It depends how you constructed the model for this part. Select the dimensions to the best of your ability. If you cannot display all the dimensions shown, you can add them as drawing dimensions later in the workalong.

Step 13

Using what you just learned, select the dimensions for the Front view of the model. In this case, there was only one. (Figure Step 13)

Figure Step 13

AUTHOR’S COMMENTS: The dimensions that display on your model may be different then the one shown here. It depends how you constructed the model for this part. Select the dimension to best of your ability.

USER TIP: To relocated a dimension on a drawing, move the cursor onto the dimension. When the cursor is on a dimension, it will highlight and the Move icon will display as shown in the figure to the right. The Move cursor is shown in the figure on the left. When the Move cursor displays, press and hold down on the left mouse button and drag the cursor to approximately the location you want to place the dimension. As you do that, Inventor will display a temporary centerline indicating the centre location between the extension lines as shown in the figure to the right. It will help you centre the dimension text. When you have the dimension positioned, release the mouse button.

Step 14

Move the dimensions to match the figure as close as possible. (Figure Step 14)

Figure Step 14

AUTHOR’S COMMENTS: Use the move technique shown in the User Tip on Page 25-18. Note: If you are missing some of the dimensions that are shown in the figure, don’t be concerned. You can add them as drawing dimensions later in the module.

Step 15

Select all of the dimensions. Change the dimensioning style to: Modules in ANSI. To do this, while the dimensions are selected, pull down the standards list. From the dimension style list, find and select the style: Modules in ANSI in the pull-down list on the Inventor Standard menu. (Figure Step 15A , 15B, and 15C)

Figure Step 15A [Click to see image full size]

Figure Step 15B

Figure Step 15C [Click to see image full size]

Step 16

Set the default dimensioning style before you insert the drawing dimensions. Pull-down the style standards list and select: Modules in (ANSI). It should now display as shown in the figure. When you insert your dimensions they will use the default dimensioning style. (Figure Step 16)

Figure Step 16

Step 17

Add the remainder of the dimensions to match the figure. This is done using the GENERAL DIMENSION (D) command, just like you did when creating your 2D sketches. (Figure Step 17A and17B)

Figure Step 17A

Figure Step 17B [Click to see image full size]

Step 18

To add or edit dimension text, click the text and right-click the mouse. In the Right-click menu, select Text. This will open the Format Text dialogue box. (Figure Step 18)

Figure Step 18

Step 19

In the text box at the bottom of the dialogue box you will see the symbols << >>. This symbol indicates the actual model dimension. You cannot edit the dimension since Inventor gets the dimension from the model. To add text, click the cursor behind the symbol and enter a comma. Press the Enter key to go to a new line. Add the Figure Step 18 text 4 PLACES. (Figure Step 19)

Figure Step 19

MUST KNOW: The dimension text symbol “<< >>” signifies that the actual dimension number is a model or drawing dimension size. Inventor will obtain the actual dimension from the solid model and display it on the drawing. You cannot edit this number nor can you delete it. If the size of the model is modified, the dimension Inventor displays will change to reflect the true size of the model.

Step 20

Using what you just learned, add the text to the other radius dimension. (Figure Step 20)

Figure Step 20

Step 21

To fill-in the titleblock, simply change the drawing’s properties. To do that, right-click the drawing’s icon in the Browser bar. In the Right-click menu, click iProperties. The titleblock has been programmed to extract the properties of the current drawing file. It will open the Inventor Properties dialogue box. (Figure Step 21)

Figure Step 21

Step 22

Enable the Summary tab. Enter TOOL HOLDER – BASE in the Title box and your name in the Author box. (Figure Step 22)

Figure Step 22

Step 23

Enable the Project tab. Enter WORKALONG 25-1A in the Part Number box. Your titleblock should now appear as shown in figure. (Figure Step 23A and 23B)

Figure Step 23A

Figure Step 23B

Step 24

Enter the TEXT command and select the location to place the text on the drawing. The cursor will display as a plus sign. Move it to just above the titleblock as shown in the figure. (Figure Step 24)

Figure Step 24

Step 25

When you select the location for the text, the Format Text dialogue box will open. In the text box along the bottom of the dialogue box enter the text as shown in the figure. Ensure that the default text style is set to: Modules Note Text (ANSI) as shown in the dialogue box. (Figure Step 25)

Figure Step 25

Step 26

The completed drawing should appear similar to the figure. (Figure Step 26)

Figure Step 26 [Click to see image full size]

Step 27

Save and close the drawing.

Exporting and Importing Styles

When a style is created in a drawing file it is only useable in that drawing file. To save you re-creating the style in each new drawing file, the style can be saved as a file on the hard drive and then retrieve into another drawing. Saving the style file from a drawing is called exporting and retrieving it into a drawing is called importing.

WORK ALONG: Exporting and Importing Styles

Step 1

Using Windows Explorer, create the folder: Style Library in the existing folder: C:\CAD Courses\Inventor Course. (Figure Step 1)

Figure Step 1

Step 2

Start Inventor and check the default project. If necessary, set it to: Inventor Course.

Step 3

Open the drawing: Inventor Lab 24-1A.idw

Step 4

Open the Style and Standard Editor dialogue box. Find and select the style: Modules in (ANSI) under the Dimension heading. It is the dimensioning style that you created earlier in the module. Right-click the name. In the Right-click menu, select Export. (Figure Step 4)

Figure Step 4

Step 5

Select the Style Library folder you created in Step 1. In the File name: box, enter the file name: Modules in (ANSI). (Figure Step 5)

Figure Step 5

Step 6

Open a new drawing file. Enter the STYLE EDITOR command and in the dialogue box, click the Import box located along the bottom of the box. (Figure Step 6)

Figure Step 6

Step 7

This will open the Import style definition dialogue box. Click the folder Style Library and select the file: Modules in (ANSI) .styxml that you exported in Step 5. (Figure Step 7)

Figure Step 7

Step 8

Activate the file: Inventor Lab 24-1A.idw and export the other two styles that you created in this drawing. Figure Step 8 shows the three styles that should now be in the Style Library folder. You can check it using Windows Explorer. (Figure Step 8)

Figure Step 8

Step 9

Open a new drawing file. Enter the STYLE EDITOR command and in the dialogue box click the Import box located along the bottom of the box. This will open the Import style definition dialogue box. This will open the Import style definition dialogue box. With the Look in: box displaying the folder Style Library, select the file: Modules in (ANSI) .styxml that you exported in Step 5. (Figure Step 9)

Figure Step 9

Key Principles

Key Principles in Module 25

1. The default styles cannot be renamed nor should they be altered. It is always best to create your own named style using a default style to copy from.
2. A style is a named set of variables or settings that controls the way the annotation will appear on the drawing.
3. The RETRIEVE DIMENSION command is used to retrieve the driven and driving dimensions from the model and display them on the drawing. If the driven dimensions in the original sketches are changed, the model dimensions in the drawing will automatically change.

Lab Exercise 25-1

Part Name	Project	Units	Template	Color	Material
See Below	Inventor Course	Inches	See Below	N/A	N/A

Step 1

Create the drawing shown below. Ensure that you:
A Retrieve as many model dimensions as you can.
B Add the drawing dimensions to complete the drawing as shown below.
C Import the dimension style: Modules in (ANSI) and use it as the dimensioning style in your drawing. Match the drawing shown below.

D Save the drawing files with the drawing name shown below.

Part: Post
Drawing Size: D
Drawing Name: Inventor Lab 25-1.idw
Part Name: Inventor Workalong 22-1B.ipt
Template: English-Modules Drawing ANSI (in).idw (Figure Step 1A, 1B, and 1C)

Figure Step 1A

Figure Step 1B [Click to see image full size]

Figure Step 1C