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

If you are using a newer version of AutoCAD, you can also try the [CMD]HELIX[/CMD] command.

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

Hi Roger,As u have indicated that u are bit new and are using 2006, creating male and female threads is not difficult.I am quite familiar with it. I can create the same for you.You can contact me on my email id kumar.urao@gmail.comregardsumesh