topic Re: Variable Pitch Spring / Progressive Helix / Equation Support in Fusion Design, Validate & Document Forum

Variable Pitch Spring / Progressive Helix / Equation Support

marvinzapf — Wed, 21 Oct 2020 18:42:02 GMT

Hey,

I want to create a helix with a progressive pitch!

Since I am a Mac user, I can't use Inventor to do it, nor use a Plugin which unfortunately are only available for Windows.

This feature was requested for years now. I know because I looked at every single "solution" that was posted since Fusion 360 emerged.

I even started requesting it in your surveys, where I was supposed to get an amazon coupon. But neither did I get a voucher nor the feature itself.

Can somebody please tell me, if you are working on such a feature and when we actually can expect the implementation of it.

Equation Support would immediately fix so many of the the workarounds we need to use to get our job done in Fusion.

Re: Variable Pitch Spring / Progressive Helix / Equation Support

shahriarsifat1802164 — Wed, 28 Oct 2020 15:02:57 GMT

Hi, You can follow this screencast:

b7b0dd6e-495f-46d8-9e73-822ffaac0719,height=undefined,

Re: Variable Pitch Spring / Progressive Helix / Equation Support

shahriarsifat1802164 — Wed, 28 Oct 2020 15:03:36 GMT

https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/screencast/Main/Details/78e50f0e-c105-45db-8c63-8e84ec6447ec.html

Re: Variable Pitch Spring / Progressive Helix / Equation Support

TheCADWhisperer — Wed, 28 Oct 2020 15:06:43 GMT

@shahriarsifat1802164

I must have missed something in your Screencast Recording - I did not see a variable pitch.

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Re: Variable Pitch Spring / Progressive Helix / Equation Support

marvinzapf — Wed, 28 Oct 2020 15:09:26 GMT

Thats not what I need.

I am able to model a spring with a constant pitch.. but I need to make one with a progressive pitch!

See the picture below 😉

Re: Variable Pitch Spring / Progressive Helix / Equation Support

shahriarsifat1802164 — Wed, 28 Oct 2020 15:17:24 GMT

Okay,
There is a solution.
You can make the whole spring divided into some portion and edit the when the pitch changes on each portion.
Lastly, combine them into a single body.
Thank you.

Re: Variable Pitch Spring / Progressive Helix / Equation Support

TheCADWhisperer — Wed, 28 Oct 2020 15:18:24 GMT

@shahriarsifat1802164 wrote:
Okay,
There is a solution.

Can you Attach example solution here?

Re: Variable Pitch Spring / Progressive Helix / Equation Support

marvinzapf — Thu, 29 Oct 2020 07:59:52 GMT

No, it isn’t! It’s barely a workaround .. I could fudge it together this way, but than it wouldn’t be a truly progressive and continuous helix!

Guys please! Every mayor 3D software can do this! Inventor, Solidworks, Blender etc.

Stop recommending ****ty solutions instead of demanding a dedicated feature!

For example:

You need to get the golden ration spiral perfect. There is currently no way to do this in Fusion! We need equation Support for those little things that are quite important to get perfect without fudging around!

Re: Variable Pitch Spring / Progressive Helix / Equation Support

drawingsTGW9A — Wed, 15 Jan 2025 19:51:37 GMT

5 years and still no answer... They really need to update the coil feature. I really could use a variable pitch coil right now for what we are doing but still nothing from fusion.

Re: Variable Pitch Spring / Progressive Helix / Equation Support

NDiClaudio — Tue, 25 Aug 2026 20:06:58 GMT

Same, desperately need a variable pitch coil.

Re: Variable Pitch Spring / Progressive Helix / Equation Support

MichaelT_123 — Wed, 26 Aug 2026 12:31:45 GMT

Hi Mr NDiClaudio and Other Desperados,

Familiarize yourself with my contribution to the post:

https://forums.autodesk.com/t5/fusion-design-validate-document/variable-pitch-thread-helix/m-p/8494822

It shows a simple mathematical equation for a variable-pitch helix. It can be adapted to other types of spirals.

Generate the required sketch curve based on the formula and pipe it. Perhaps there are some apps in the Fusion Store which could be utilized here.

Some software other than Fusion might also help here, like e.g. Blender?

If only Mr. TrippyLighting is in the mood to cheat on beloved Fusion and go on a springy date with Blender,

he could easily produce quite a cute offspring with some variability.

Regards

MichaelT