TheSwamp

CAD Forums => CAD General => The Third Dimension => Topic started by: Barry Clark on January 13, 2006, 08:53:29 AM

Title: 3D reducing pipe on an arc
Post by: Barry Clark on January 13, 2006, 08:53:29 AM

What I am trying to accomplish is to draw a 3D reducing 90 degree ell. It would start at 6" and end at 3" and reduce gradually and evenly along an arc. Any thoughts on how to accomplish this?

Title: Re: 3D reducing pipe on an arc
Post by: Jürg Menzi on January 13, 2006, 09:09:06 AM

Hi Barry

Do you mean something like this?

(http://www.theswamp.org/screens/JuergMenzi/Reducing.jpg)

Title: Re: 3D reducing pipe on an arc
Post by: Barry Clark on January 13, 2006, 09:15:03 AM

Exactly!

How did you accomplish this and is it a solid?

Title: Re: 3D reducing pipe on an arc
Post by: Jürg Menzi on January 13, 2006, 09:29:51 AM

- Draw a 90° arc
- Draw a circle with the larger Ø on the desired arc endpoint
- 3D rotate the circle 90°
- Calculate the taper angle by length of the arc, small and large radius
- Extrude, option path, option taper angle

That's it... :-D

Title: Re: 3D reducing pipe on an arc
Post by: Barry Clark on January 13, 2006, 09:42:37 AM

 :oops: OK. I feel just a touch stupid.  :-D I have always whipped through the extrusion process so quickly that I never noticed the taper option. geez. Thanks!  :-)

Title: Re: 3D reducing pipe on an arc
Post by: Jürg Menzi on January 13, 2006, 09:46:28 AM

Glad to help... nobody is perfect... :angel:

Title: Re: 3D reducing pipe on an arc
Post by: Barry Clark on January 17, 2006, 08:08:48 AM

Yeah, but I would like to lay claim to the obvious things. haha.  :-D

Title: Re: 3D reducing pipe on an arc
Post by: t-bear on January 19, 2006, 08:12:15 AM

Now THAT is slick!!  Thanks Jurg, for that one.  Haven't had a call for a reducing ell yet, but I got this in my "toolbox" now.

Title: Re: 3D reducing pipe on an arc
Post by: ChrisSolid on January 19, 2006, 10:23:03 AM

Quote from: Barry Clark on January 13, 2006, 09:42:37 AM

:oops: OK. I feel just a touch stupid.  :-D I have always whipped through the extrusion process so quickly that I never noticed the taper option. geez. Thanks!  :-)

Don't feel bad. If I'm not mistaken, I believe AutoCAD has only been able to do a tapered extrusion along a path since R2004. Before that, you could do a tapered extrusion, but only along a straight vector, not along a path, and it's possible you were sort of sub conscienciously remembering that limitation.

Title: Re: 3D reducing pipe on an arc
Post by: Barry Clark on January 20, 2006, 07:37:46 AM

You see. That is what I originally thought. I hope that is right. haha. As often as I use that command, I really hope that is right. haha.