Parts are disarranged after storing and reopen the project

[Gonzo65]

Cura Version

5.7.1

Operating System

Windows 10

Printer

Creality Ender 3

Reproduction steps

I arranged parts and stored the project. When I opened it again the positions of the parts are completely changed.

I added the project (surely with disarranged parts), a picture with arranged parts and storing just after that, a picture after I opened the project again and the log file.

This issue I only recognized with this project.

Actual results

The parts are disarranged when I close the project and open it again.

Expected results

The parts should be arranged as I stored the project.

Add your .zip and screenshots here ⬇️

Schneckenschutz_200 v1_Teil1.zip


cura.log

[GregValiant]

Thanks for the report.
Whether I open the file "as a project" or just "import models" I get the same effect. So yes, I can duplicate this with your project and the parts do move around. I have not had that happen in my own projects though.
With these parts, if I save the file as a UCP, I get the same results with the parts changing position when I open the UCP file.
I tried a couple of different things. Opening the file in MS 3D Builder, the models are located the way we see when the project is opened in Cura. I moved the models around in MS 3D Builder and then rebuilt the project file in Cura, and everything was fine. So this may have something to do with the individual models involved.
What software did you use to generate the models?

The Cura team will take a look.

This is the project file I generated after altering the model locations in MS 3D Builder.
GV_Schneckenschutz.zip

[Gonzo65]

Hello Greg. Thank you for your response. I build the parts with Fusion360. Everything worked fine until this project. It is a little bit crazy. Best regards Dirk GregValiant ***@***.***> schrieb am Mo., 29. Juli 2024, 14:37:

…

Thanks for the report. Whether I open the file "as a project" or just "import models" I get the same effect. So yes, I can duplicate this with your project and the parts do move around. I have not had that happen in my own projects though. With these parts, if I save the file as a UCP, I get the same results with the parts changing position when I open the UCP file. I tried a couple of different things. Opening the file in MS 3D Builder, the models are located the way we see when the project is opened in Cura. I moved the models around in MS 3D Builder and then rebuilt the project file in Cura, and everything was fine. So this may have something to do with the individual models involved. What software did you use to generate the models? The Cura team will take a look. This is the project file I generated after altering the model locations in MS 3D Builder. GV_Schneckenschutz.zip <https://github.com/user-attachments/files/16413082/GV_Schneckenschutz.zip> — Reply to this email directly, view it on GitHub <#19445 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AV5QIILTHTDL7NPVBH7EUH3ZOYZQZAVCNFSM6AAAAABLT4FNJ6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDENJVHAYTSMJZGI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[GregValiant]

The small models were way off in the Z when I opened the project in MS 3D Builder and that's how they looked in Cura as well. Then, bringing them back into Cura, the scale was off by 1/25.4 for just the small models. That happens once in a while (with MS 3D Builder) but I've never had it happen with just one model in a file while the other model scaled OK.
I'm thinking this might be a problem with the Fusion export utility but it could be a problem with Cura, or MS 3D Builder as well. It's tough when the tools don't agree.

[Asterchades]

If I might offer a different perspective....

I suspect this may be related to an issue that was corrected in 5.7.2. It's not so much that when the objects are imported that they're put into the wrong position - it's when they're exported that their position isn't correctly maintained. I'm not entirely sure as to when this was first introduced (I suspect 5.7.0) but it has since been fixed (though I would recommend using the 5.8 beta instead of 5.7.2 due to other regressions it introduced).

Ref: https://github.com/Ultimaker/Cura/releases/tag/5.7.2-RC2

Fixed a bug where modifier meshes and support meshes were not loaded in the correct position, should resolve #18761 (and 5axes/SpoonAntiWarping#8)

[GregValiant]

So far, I'm going to stick with my original conclusion that this is somehow related to a problem in the model files themselves.

I opened the posted project file in 5.8 beta1
I rearranged the parts into an approximation of where they seemed to belong, and created a Project File using 5.8 beta1.
Then I opened that project in 5.8 beta1.

So the same condition seems to exist in 5.8 beta1 as it did in 5.7.1. "Arrange all Models" has an odd result as well.

[GregValiant]

Again in 5.8 beta1...
This is with the original project file and then:
"Select All"
"Merge Models"

The models appear to jump to their "Assembled" position. Why the Z is off, I have no idea. The parts are properly nested.

Re-opening the original file...
"Reset all model transformations" causes the parts to assemble themselves into the "Assembly". Using this method, all the models are at Z=0 so the assembly isn't the same as the "merge". Using "merge" does account for the large models being nested in the small models and at different Z heights.

That was a lot of verbiage to say "I can't tell".