topic Re: Can a spline be dimensioned??? in Inventor Forum

Can a spline be dimensioned???

chris66 — Mon, 13 Nov 2023 23:09:26 GMT

I have a simple spline in this part. We won't have any trouble machining it (at least I'm told we won't). This honestly is the first time I've ran across this.

How would you document a spline on the idw??? I can grab the width (8mm) and depth (3mm).

As soon as manufacturing got this, I was getting a call; what is the radius?? Of course, you can't answer that with a spline.

How would you document this???

Thanks!

Chris

IV 2024

Re: Can a spline be dimensioned???

Gabriel_Watson — Tue, 14 Nov 2023 03:14:26 GMT

You might want to export a 3D STP or any file that can be used as direct input for your machine, if possible. Otherwise, you can only do your best in sampling.
A few examples (add points and measure against them, like samples for the curves):
https://help.autodesk.com/view/INVNTOR/2023/ENU/?guid=GUID-B303B8D0-3A08-4D22-9A15-B3AA7923CCC7
And another:
https://forums.autodesk.com/t5/inventor-forum/inventor-2014-annotate-drawing-dimensions-of-spline-points-from/td-p/7816425

Re: Can a spline be dimensioned???

IgorMir — Wed, 15 Nov 2023 04:19:08 GMT

In a drawing I would create a sketch over the spline and put an arc in there, using three points. If the spline looks and feels like an arc - it probably is an arc.

Cheers,

Igor.

Re: Can a spline be dimensioned???

johnsonshiue — Sat, 18 Nov 2023 01:41:50 GMT

Hi! It is almost impossible to recreate the same spline on a different system by giving dimensions and constraints. Depending on the accuracy requirement, you may get really close to the source but it is never precise.

Many thanks!