how can i draw 3d polylines with arcs??

[Guest_imported]

How can i draw a 3d polyline with arcs? i'm trying to draw a 1/2" thk wire coiled up kinda like a spring.
i'v been useing a pline then extruding a 1/2" circle along the pline path but i cant get arcs or circles with the 3d polyline.
please help
thanx damon

 

[PhoenixAA]

Not sure if this will work its been a while since Ive used AutoCAD, but could you draw the object using arcs, then convert to polyline using the pedit command? not sure how this will work for 3d poly though.

Hope this helps. :-D

 

[basepointdesignz]

Sounds like you're trying to draw a helix or 3D coil (you can draw one with a 3D polyline and extrude a shape along it's length..
If so, there are several methods to do this. If you need a full rundown on how to draw one manually (quite good to know for future reference), let me know by replying to this thread.
Alternatively, there are many AutoLISP programs that are floating about on the net, which are specially designed to aid in helix drawing. Check out one of the many AutoCAD/AutoLISP sites - sorry, can't remember one to hand. Perhaps someone else out there might know??!!

I'm currently trying to write a VBA program that will create a 3D helix - when I finish it I'll try and forward it to people who may use it..

Like I said, let me know if you want help..

Renegade