trying to make a fan

I have the 2005 version and I want to make an arm of a fan.... I've tried to
extrude a square along a curve but, the obtained object is not what I want.
Any way to do or website where it is explained??

Many thanks from spain

 

Acad is limited when it comes to 3D curved surfaces. It won't do any
kind of non-uniform compound curves or NURBS surfaces.

That's why they are going to Inventor for 3D.

 

It is possible to extrude (sweep) a rsuare (rectangle) along a duiding
3D-polyline without twisting.
The result is - saying the truth - facetted, not smooth. But you can set up
the accuracy very high (by increasing the amount of the file).
For doing "SWEEPING" you could use my PEDIT3D and my OFFSET3D to create the
guiding 3D-polys. Then you can make RULESURF-surfaces between them and with
help of M2S.lsp you can make the 3DSOLIDs.
In case of interest please ask me via www.black-cad.de
Regards
Jochen