Wraping on a dome?

[PBfan]

I'm trying to put a sketch on a domed surface. And using the wrap feature I've had no luck. Is there another way around this?

Thank you

Edited: Sorry. But wrapping only seems to work on sides of cylinders? How can you do this on any non cylindrical surface? Or am I missing something pretty obvious?

[HuFlungDung]

I would say that wrapping would only apply to shapes where the surface does not need to stretch when converted from wrapped to unwrapped.

You could project geometry onto any shape of a surface, but the trade-off is a certain amount of distortion. If the projection can be broken up in segments, and then rotated to keep each section normal to the sphere, then you might get acceptable projection of each segment, with reduced distortion of each one, and considerably better look near the edges.

[PBfan]

Even on a surface that was roughly 60% of a cylinder. It still would not project to the face. The face was smooth and continous.

I'll get some pics of just a test I was doing to see if I could.

[solidcad]

Originally Posted by PBfan I'm trying to put a sketch on a domed surface. And using the wrap feature I've had no luck. Is there another way around this? Thank you Edited: Sorry. But wrapping only seems to work on sides of cylinders? How can you do this on any non cylindrical surface? Or am I missing something pretty obvious?

Can't you use Insert-Curve-Projected to get curve on your surface?

[PBfan]

Yes. That will put a sketch on the surface. I forgot to add that the purpose is for embossing. And Insert>Curves>Project doesnt allow to emboss or the like. Also. Projecting does not change the scetch to keep its shape. It simply projects it down intead of wrapping it. Hence my problem.

Sorry for no pics. I got busy. But I'll get them tomorrow if needed.

[JerryFlyGuy]

PBfan, your gonna have to get us some pic's to clarify just what kind of geometry your working with. There's millions of ways this could be interpreted.
In this case a picture is worth a million words

Jerry

[PBfan]

Alright. Here's a part I did just so you can understand what I'm trying to do. Simply take a skect..and deboss/emboss it to a surface. In this case its a star on the wall of a cylinder. Very simple. And SW can do this with no problem. The problem is trying to deboss this star(or any other shape) on a dome...or other surface. The last pic is just the deboss with a chamfer.

I understand that you had asked for a pic with the geometry I'm working with. But this is purely experimental right now as far as what I willl be working with. Now when I say this. There is one for sure I know I will. But the same concept shold be able to be aplied to any other situation. As I wrote this I got the pic of one of the parts where the dome in my original quesions was being used.

Sorry for any confusion!

[ltmquik]

Is this what you are after?

[tobyaxis]

I use BCC but maybe if you draw your Sphere, then your Star, use the Booleans Function, Subtract, Merge , and Subtract your Star from your part.

Just my 2 cents LOL

[JerryFlyGuy]

A star on a dome is pretty simple. Adding something around the complete sphere is a bit more of a problem. Are you trying to add a shape which flows around the entire part? I'm not completely sure I understand what you mean by 'embossing' or 'deboss'

[PBfan]

Subtracting and things give me the same function as projecting only more complicated.

When you use the wrap command. Your sketch is literally wrapped around the face. Embossing is raising the surface. And De bossing is an indent in the surface.

Now can I get a raised or lowered surface from project or other ways? Yeah. Its really hard to tell. But if you look at something you wrap. And have it embossed. The edges are all perpendicular to the face where its at. But using project all faces are the same direction. I'll put pics of that up in a little bit.

**Picture is up now. Its exaggerated the amount it would be embossed just so you can see what I mean about how the edges of it are.**

[HuFlungDung]

I still think that 'wrapping' is not the applicable term/function unless it can be conceived in terms of a polar to linear conversion of coordinates. Wrapping onto a sphere is not a wrap, it is a stretch, and must necessarily be an approximation. That is why I think you would have to break the flat map up into small segments and project them onto the 3d surface. The segments would have to manually be positioned at appropriate angles around the sphere before projecting.

Now this is likely going to create line geometry that will need to be manually trimmed or filletted together wherever the ends should meet.