I want to draw a 3D coil that I can then use as a path to extrude a face with.  Or, if I can use a large diameter wire, I could make a second with smaller diameter and subtract from the large.  The idea is to represent a coiled condenser tube as used in chem lab.

I tried using the SOL_SPRING.LSP file, but I'm new to using the LISP applications and couldn't select a valid "3D Spiral".

Can someone suggest an alternative or tell me how to use the app?

Thanks,
Roger

Thanks Vladimir, but I'm using version 2006 which doesn't have the HELIX command.

Now I also would like to be able to draw threads, as in machine screws, and pipes.  In sizes from 1/16 to 4", both male and female.

Any other ideas?

Thank You,
Roger