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AutoCAD Tutorial

AutoCAD 3D Modeling: Wireframe Models, Part 3

July 30, 2003

The following tutorial focuses on resolving OSnap problems in a 3D environment. Meanwhile you will create the model of a barrel. If you are not familiar with Wireframe models read the following tutorials:

AutoCAD 3D Modeling: Wireframe Models, Part 1
AutoCAD 3D Modeling: Wireframe Models, Part 2

Figure 1


  • This tutorial is designed for AutoCAD 2004 though might be applicable for other releases.
  • In this tutorial user entries are in boldface.
  • The 8 symbol is equivalent to pressing Enter.

1. Download r16_wireframe_barrel.dwg.

Note: If you are using AutoCAD 2002 or an earlier release download r15_wireframe_barrel.dwg.

2. Draw a circle. The radius is equal to 15 and the center point is located on origin.

3. Draw two additional circles on the same location. The radiuses of both circles are equal to 10 units.

4. Move the last circle 20 units along negative Z direction:

Command: m8
Select objects:
1 found
Select objects:
Specify base point or displacement:
Specify second point of displacement or <use first point as displacement>:

5. Change the viewpoint to SE Isometric [Figure 2]:

Command: -view8
Enter an option [?/Orthographic/Delete/Restore/Save/Ucs/Window]:

Figure 2

6. Move the other small circle 20 units along positive Z direction.

7. Invoke Zoom-extents [Figure 3].

Figure 3

8. Connect the center-points of the circles to their right side quadrant with some line segments [Figure 4].

Figure 4

Note: The lines are necessary as the Quadrant OSnap will not be available after we rotate the UCS.

9. Rotate UCS, 90 degrees about X axis [Figure 5].

Note: For more information about UCS read the following tutorial:
AutoCAD 3D Modeling: User Coordinate System

Figure 5

10. Connect the right side endpoints of the lines with an arc [Figure 6].

Figure 6

11. Erase the auxiliary lines.

12. Enable WCS.

13. Select the arc.

14. Invoke ARRAY. Apply the settings shown in figure 7.

Figure 7

15. Click OK [Figure 8].

Figure 8

About the Author

Alireza Parsai is the founder of cadpanel.com. He is a mechanical engineer with more than 12 years experience with AutoCAD. Alireza is an Autodesk Authorized Author, the AutoCAD consultant for Al Khawarizmi Institute, a contributing editor for Augiworld magazine, a writer for CAD Digest, an instructor for AUGI Training Program, and an elected speaker for Autodesk University 2002. He has written 7 books in Farsi, 3 booklets in English, and more than 30 articles for different magazines and newsletters. You can reach him at alireza.parsai@cadpanel.com or visit his website www.cadpanel.com

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