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AutoCAD Tutorial

AutoCAD 3D Modeling: Wireframe Models, Part 1

July 28, 2003

Most of Wireframe models are built with 2D objects. The success key is in correct use of UCS and 2D commands. Here you will learn how to build the following simple Wireframe models. Two further tutorials will help you to create more complex Wireframe models.


Figure 1 - Click on image to enlarge

Note: 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_p1.dwg.

Note: If you are using AutoCAD 2002 or an earlier release download r15_wireframe_p1.dwg.

2. Draw a 33 square. Locate the lower left corner of the square on origin [Figure 2].


Figure 2

3. Create an offset copy of the square. Set the offset distance to 1 [Figure 3].


Figure 3

4. Move the small square 3 units along Z axis:

Command: m 8
MOVE
Select objects:
l8
1 found
Select objects:
8
Specify base point or displacement:
0,0,38
Specify second point of displacement or <use first point as       displacement>:
8

5. Connect the lower left corners of the squares with a line segment [Figure 4].


Figure 4

6. Select the line.

7. Invoke ARRAY. Use the settings shown in Figure 5.


Figure 5

8. Click OK to create the polar array [Figure 6].


Figure 6

9. Move the objects 7 units along X and Y axes simultaneously:

Command: m 8
MOVE
Select objects:
all8
10 found
Select objects:
8
Specify base point or displacement:
7,78
Specify second point of displacement or <use first point as displacement>:
8

10. Use display tools to build a 3D view similar to Figure 7.


Figure 7- Click on image to enlarge

Note: For more information on 3D display tools read the following tutorial:
AutoCAD 3D Modeling: 3D Views

11. Select WF2 as the current layer.

12. Freeze WF1 layer.

13. Rotate UCS +90 degrees about X axis.

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

14. Draw a polyline as follows [Figure 8]:

Command: pl8
PLINE
Specify start point:
3,38
Current line-width is 0.0000
Specify next point or [Arc/Halfwidth/Length/Undo/Width]:
0,38
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
0,08
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
5,08
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
c8


Figure 8

15. Switch to WCS:

Command: ucs8
Current ucs name: *NO NAME*
Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World]
<World>:8

16. Copy the polyline 2 units along Y axis [Figure 9]:

Command: cp8
COPY
Select objects:
l8
1 found
Select objects:
8
Specify base point or displacement, or [Multiple]:
0,28
Specify second point of displacement or <use first point as displacement>:
8


Figure 9

17. Connect the opposite endpoints with line segments [Figure 10].


Figure 10

18. Thaw WF1 to view both models at the same time.


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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