Problem with flexible movement in Inventor 2023

[lanUKNAP]

Hi

I hope someone can help me. I have just updated to Inventor 2023 from 2022 and I am having problems with the movement of part in my existing assemblies.

As soon as a part gets a constrain I can not move it freely in the remaining dimensions any more. If I remove the constrain again I can move the part freely in 3 dimensions.

Also all my flexible subassemblies does not work any more. They will not move.

However if I make a completely new assembly flexible subassemblies work fine and I can move part freely with one or more constrains.

What can I do so that do not have do all my assemblies all over again?

I have tried migrating the assembly and the flexible subassemblies.

I have have tried "Rebuild all".

Update: A nonsolution is if I delete all patterns in the assembly. This also affects if I make a new assembly. So I guess there is a bug where patterns and free movements and patterns cannot coexist in the same assembly.

[thomasXUGZK]

I've noticed that over the past several revs that the application has become less and less responsive. the constraint preview slowing went away.... rarely works any more. I have to select update after every constraint to get the parts to move into place. Autodesk has a gift for screwing up Inventor more and more with every iteration of the app

[SBix26]

This is not my experience with Inventor 2023, so there is more to it than "Autodesk ... screwing up Inventor..."  Does it happen in all assemblies, or only certain ones?  Can you zip and attach a small assembly here that behaves this way?

---

Sam B

Inventor Pro 2023.2 | Windows 10 Home 21H2

[reinhardtHA2RD]

I am running Release: 2023.1.1 2023 and this exactly describes the issue I have:

"Any part within an assembly can be freely moved until a single constraint is placed on it. Once that constraint is placed, all movement is locked even though there should be free DOFs."

The part is not part of a component pattern.

The issue accures very often but not all the time.

After reading through this thread I think it might be connected with parts and assemblies migrated from older versions which is mandatory.

[lancermandc_co_za]

Make sure you have the latest updates, that will fix the problem.....


Disclaimer

The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful.

his email has been scanned for viruses and malware, and automatically archived by Mimecast SA (Pty) Ltd, an innovator in Software as a Service (SaaS) for business. Mimecast Unified Email Management (UEM) offers email continuity, security, archiving and compliance with all current legislation. To find out more, visit http://www.mimecast.co.za/uem.

[johnsonshiue]

Hi! Yes, Lance is right. This was a defect in 2023.1. Please install 2023.2.1. The problem should go away.

Many thanks!

[stephenU6PYM]

I seem to be having this exact problem using Inventor 2023.2, @johnsonshiue is this a common issue in 2023.2? Are there any ways it can be solved as I currently have no pending updates. Cheers. 

[lancermandc_co_za]

The updates for 2023 will sort out the problem, or upgrade to 2024 and there are no more problems....

[JDMather]

@stephenU6PYM 

Can you Attach assembly here that exhibits this behavior?

[johnsonshiue]

Hi Stephen,

I am not sure if your flexible movement issue is the same as the OP's. Please share the files in zip here. The forum experts can help take a look to understand it ebtter.

Many thanks!

[cdaugherty]

I'm having this same issue and I have Inventor 2023.3.1 installed

[johnsonshiue]

Hi! I will need to take a look at the files to say it for sure. There are multiple situations you may see confusing behaviors in a flexible subassembly. Please share the files in zip with me directly johnson.shiue@autodesk.com. I would like to understand the behavior better.

Many thanks!

[cdaugherty]

After adding some different constraints, which are cumbersome and overkill, I was able to get the error message to stop popping up. However, I still can't drive my constraint, it errors out when I try. The assembly was too large to email so I'm adding it here. The motion is a simple extend and retract.

[johnsonshiue]

Hi! Many thanks for sharing the files! Could you tell me which constraint to drive the assembly?

Thanks again!

[cdaugherty]

I believe it is one of the last constraints added. It's the only constraint with the +/- at the end. I'm also having trouble with constraints. If I put one constraint on a part it won't move within the other axis of freedom, and the parts aren't snapping to the constraint consistently either.

[sam_pinches]

It appears this issue persists in Inventor 2024. I have the same issue of components locking that should have unconstrained DOF. I have only found this to be the case when there are component patterns. 

[johnsonshiue]

Hi Sam,

It is unclear to me if your flexible assembly issue is the same as the OP and other users. If possible, please share an example that illustrates the issue here. The forum experts can help take a further look. It could be a bug to fix or there might be a better way to do it.

Many thanks!

[lancermandc_co_za]

I agree with Mr Shiue...

Perhaps upload a Pack 'n Go of your assembly.....

[WHolzwarth]

I've played with the assembly of @cdaugherty, trying to move the timing belt pulleys.
I got it running with different fixed components, drive the last angle in relationships

But now make 21.1050.10.4051:1 fixed, and unfix 21.1050.10.4081:1.
Then the system locks, no more driving angle is possible.

[julwelli]

It is now September, 2024.  I have all updates.  Yet, this problem still persists.  I am finding no solution.  If there was a fix to this bug and added to an update, why is it still happening.  I place a part in an assembly.  Add first constraint, then want to move the part before adding a 2nd and 3rd constraint, but the part is frozen.  Very annoying.

[julwelli]

It is September, 2024 and I continue to deal with this very annoying problem.  I add a part to an assembly and, after creating a constraint, the part is no longer free to move in other non-constrained directions.  My software tells me that I have no updates, so I assume any fix for this bug would have been updated in my system.  This is a very frustrating annoyance and I'm wondering if it's been solved.