Modelling help, flat spiral spring - not constant

[spl1970]

Wonder if anyone can give me some tips on how I can create a model to represent a spring in the attached image please. I can achieve a spring that has a constantly winding coil but don't know how to create one that 'tightens' as it gets bigger.

Thanks,

Simon

[mcgyvr · Accepted solution]

https://forums.autodesk.com/t5/inventor-forum/3d-equation-curve-to-create-a-fibonacci-spiral/td-p/57...

[mcgyvr · Accepted solution]

And some help on creating equation curves..

https://knowledge.autodesk.com/support/inventor/learn-explore/caas/CloudHelp/cloudhelp/2020/ENU/Inve...

[johnsonshiue · Accepted solution]

Hi! Another option is to create Variable-Pitch and Variable-Radius Helix in 3D Sketch. Then project it to a 2D Sketch.

Many thanks!