Pretty straightforward. Plug in some numbers and generate. I've included a few STLs as examples.
Update 10/29/23: Fixed the SCAD code to use proper trigonometry instead of fudge factors.
| spider-web-200-6-12.stl | 682.2KB | |
| spider-web-200-8-20.stl | 1.5MB | |
| spider-web-25-4-10.stl | 282.3KB | |
| spider-web-coaster.stl | 606.9KB | |
| spider-web.scad | 654.0B |
