3D Modeling.

[Anonymous]

After hunting on the internet for awhile I have come up with no easy solution to my problem. I need to taper the top section of many shapes like this for a 3D model for a CNC router to create a carving. What would be the easiest way to go about creating this ideally it'd be like a mountain as a wider base that tapers to a peak in the middle. Any links to videos or commands are very much appreciated. It can start as shown below or just a 2d polyline.

 

[imadHabash]

Hi and Welcome to AutoDesk Forum,

PRESSPULL command is your need for such a case,active the command then press inner the shape that you want to extrude.read HERE for more info and you can found a lot of tutorials through Google search.

Regards,

[swieciakpawel · Accepted solution]

Hey,

Unfortunately, everything depends on the shape itself.

A) For some simple cases it might be possible to use EXTRUDE with Taper angle (Example), but for many cases this will throw out lot of errors like "Surface is illegal" or "self intersecting body".

Other approaches that You can try are crude ( nothing will look perfect in my opinion), but You might give them a shot if no one comes up with better solution.

B)

If You're interested in just a small taper angle, sometimes it's possible to use something like this: 

1. Start with Your 2D Polyline

2. Use command OFFSET (or manually create internal object), that would create second polyline inside

3. Move second polyline upwards

4. Use LOFT command on those polylines to create a solid.

C)

Other thing You might try (If You can accept limitation in taper control) is creating 2 or more extrudes along different directions and then using INTERSECT command to obtain single shape. The more complicated shape, the more directions you have to consider for it to look good. (EXAMPLE).

Good luck!

Kind Regards,
Pawel