topic Re: Assembly component fully constraint indicator and flexible bug? in Inventor Forum

Assembly component fully constraint indicator and flexible bug?

kfyiuaaLHZBW — Sat, 09 Aug 2025 04:07:53 GMT

Hi, im using Autodesk Inventor 2024. I noticed a behavior, not sure if it is normal/intended

Firstly, the degree of freedom view was only applied to Non flexible sub-assemblies. I have to disable component flexible -> enable DOF view for it to work. However, i need the flexible to remain enabled, in other words i don't know whether the flexible components are fully constraint in the top-assembly unless I to the aforementioned step.

Secondly, The fully constraint indicator i.e. black dot in the assembly browser seems outdated/unable to reflect actual constraint status of the flexible component. An assembly rebuild didn't updated the component's constraint indicator. I had to disable then enable flexible for it to be displayed correctly.

The video below illustrates the above behavior.

(view in My Videos)

Re: Assembly component fully constraint indicator and flexible bug?

kacper.suchomski — Sat, 09 Aug 2025 12:34:58 GMT

@kfyiuaaLHZBW wrote:

in other words i don't know whether the flexible components are fully constraint in the top-assembly unless I to the aforementioned step.

Flexible and fully constrained are, in a sense, logical contradictions.

Flexibility serves to provide a certain freedom of movement, which excludes stability (fully constrained).

Re: Assembly component fully constraint indicator and flexible bug?

kfyiuaaLHZBW — Sun, 10 Aug 2025 04:32:48 GMT

I see , that does make sense. Then another way to look at the issue, the full black dot should actually disappear when I enable the flexibility as it isn't "constrained ".

Re: Assembly component fully constraint indicator and flexible bug?

SBix26 — Sun, 10 Aug 2025 19:05:27 GMT

The ideal behavior, in my opinion, is for the solid filled-in dot to reflect the constrained status of the components of subassemblies. As an example, I have created an optical sensor pair (emitter and receiver) as an under-constrained assembly, since the components as applied can be at any distance within the prescribed range and at any angle around their mutual axis. Once mounted and constrained in a higher-level assembly, there should be no degrees of freedom remaining for that subassembly and the dot should be solid. But the dot should not be solid if the subassembly is made Flexible and is not fully constrained. In other words, Flexible should expose the subassembly's constraints to the assembly in which it participates.

Sam B

Inventor Pro 2026.1 | Windows 11 Home 24H2