3d rookie needs help

[rsmart]

I'm in the process of giving myself a crash course in 3d. The project I'm working on is essentially a plenum that changes from a sideways 8 to an oval.

Is there any way I can change shape as I revolve?
Or to fillet between the mergeing of the two shapes?

I've played a little with rulesurf, but my results are far from what I was looking for.

How to do you turn the dwg file into a jpeg, so I could post a picture that might better indicate what I'm attempting?

Thanks for any help you may be able to offer.
Ryan

[hyposmurf]

I've actually seen the answer to your question on this forum.I think it may have been an exhaust or something similar,a cylinder changing to a more oval shaped cylinder.It may have been FZ or someone who was discussing it.I'll have a look and see if I can find it for you,or some one else might remember the post.

[Mr T]

To post an image hit PRINTSCREEN and then paste into a bitmap editor (or word) crop and then post it.

I can probably help but don't understand ur question/problem !

nick

[hyposmurf]

Bingo! :)
http://www.cadtutor.net/forum/viewtopic.php?t=875&highlight=cylinder

[rsmart]

Ive made a little progress, by subtracting cones out of an ellipse to help me get my shape. But where the circles are extruded back and the oval is extruded forward I still have an abrupt meet that I would like to apply a radius to.

I think I can get most of it out when I play with numbers to get my wall thickness, and tapers exactly right.

http://community.webshots.com/s/image9/1/52/24/115915224QNEoHo_ph.jpg

[Flores]

Do a forum search for "scone". There are some suggestions for rulesurf that might help.

Flores

[rsmart]

Hey guys thanks for the quick responses. I'm going to get my hard numbers, this evening, before I put any more work into this one. But now I atleast have a more ideas to experiment with tonight.

Basically the jpeg I posted is the top half, from the back of it I'll revolve an ellipse down into a open plenum. But I know I'm going to have more changes in the cross section.

Does anyone have any info on that m2s lisp? I assume a lisp is like a can program? Where can I get it?

I'll also play with rulesurf some more. Maybe I can get the hang of it. My past experiments the generated sides so to speak did not meet smoothly with either the circle or ellipse.
Thanks
Ryan

[gcp310]

do a google search, or go to the link below

http://www.accustudio.com/marketplace/freeware.htm


G

[gcp310]

sorry, tried the link, the link to the lisp must be down.

G