AutoCAD 3D Modeling: Revolved Surface
August 6, 2003 The REVSURF command enables you to create a
surface, based on the revolution of a curve about an axis. The
curve can be a line, spline, polyline, arc, circle, ellipse, or
elliptical arc. The SURFTAB1 and SURFTAB2 system variables
control the number of divisions in the final 3D mesh.
Notes:
- 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 represents pressing Enter.
1. Download
r16_rev_surf.dwg
Note: If you are using AutoCAD 2002 or an earlier
release download
r15_rev_surf.dwg
2. Open the drawing in AutoCAD. The drawing consists
of a vertical line and a closed area built of lines and arcs
[Figure 1].
Figure 1
3. Switch the shade mode to Gouraud Shaded, Edges On.
4. Alter the value of SURFTAB1 system variable to 36.
Command: surftab1 8
Enter new value for SURFTAB1 <6>: 368
5. Invoke PEDIT.
6. Select one of the arcs. Enter Y and then press Enter to
convert the arc to a polyline.
7. Select Join then select all the objects. The
objects to the left are converted to a polyline.
8. Press Enter to end the PEDIT command.
9. Set the view to SE Isometric [Figure 2]:
Command: -view8
Enter an option [?/Orthographic/Delete/Restore/Save/Ucs/Window]:
seiso8
Figure 2
10. Invoke REVSURF (Draw > Surfaces > Revolved
Surface).
11. Select the polyline as the path curve and the line
as the axis of revolution
12. The start and end angles of the revolved surface
are 0 and 360 degrees respectively [Figure 3].
Figure 3
13. Erase the new 3D mesh.
14. Alter SURFTAB2 to 12.
15. Create the surface again. The quality of the
surface is better now.
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.
|
