3MF files, origin, and arrange all models

[jhalewood 0]

Hello,

 

I sometimes create fusion 360 models for a complete project with parts where they need to be relative to others; i.e. a single body/component origin in fusion 360 can be anywhere.

 

When I 3D print from fusion, using 3MF, the part goes across to Cura which respects that origin, and it ends up well outside the build volume.

 

If I then attempt to 'arrange all models' all it does is arrange X & Y, but ignores Z if Z is outside the build volume (if Z is inside the build volume now, it'll drop to build plate, but not if it's still outside the volume after arranging X & Y).

 

Not arranging Z if it's outside the build volume after first arranging X & Y seems like a bug, but another useful option might be to have a preference setting in Cura to optionally ignore 3MF location settings when importing. Some people may want that, and that's fine, but I never care about original part location on import. I always want to 'arrange all models'.

 

 

[Slashee_the_Cow 303]

Fusion 3D exports files with objects' transform origins in different co-ordinates to what Cura uses, which is why things appear in the wrong location upon loading the file.

 

There is an easy way to drop all models to the build plate though: once you've opened the 3mf file, press Ctrl+A to select all the objects, then click the move button in the sidebar and set Z to 0 (and then turn on drop down model if it isn't already on might be a good idea) and it will affect all of them.

Edited October 18, 2023 by Slashee_the_Cow

[iridiumx 0]

Hello. 

 

On the flip side of things, 

 

 In 5.4 when I import multiple parts exported from F360 in 3mf format, The models will be position correctly as per in F360. 

But in later versions, importing the models in 3mf just centers them all. I need to print a multi part model as one.

 

I cant find, but is it a function that can be turned back on? 

[Slashee_the_Cow 303]

On 5/2/2024 at 5:22 PM, iridiumx said:

Hello. 

 

On the flip side of things, 

 

 In 5.4 when I import multiple parts exported from F360 in 3mf format, The models will be position correctly as per in F360. 

But in later versions, importing the models in 3mf just centers them all. I need to print a multi part model as one.

 

I cant find, but is it a function that can be turned back on? 

Make sure your parts aren't so big or tiny that Cura automatically scales them (or just turn the auto scaling off in the settings). If you could share an example of a file which has this issue then we can have a look and see if there's anything to be figured out.

[iridiumx 0]

Hello. 

 

So basically model is 2 body model

 

part was export as 2 individual 3mf files. 

 

when opening the 2 files in cura 5.4, it will be loaded with reference of the origin.

where as in the later versions, cura will center the part auomatically, 

Body1.3mfBody2.3mf

 

i attach here the 2 3mf files. 

Automatically drop models to the buildplate is unchecked.

please let me know if i am doing anything wrong. 

thank you. 

 

[GregValiant 1,287]

Bring in both models.

Right-click on the build plate and select "Select all Models" then right-click again and select "Merge Models".  The models will (should) jump into alignment with each other.  Then you can move and rotate the merged "assembly".

"Drop models to build plate" doesn't really come into it so it doesn't matter if it is enabled or not.  You will probably still have a secondary move that must be made on the assembly.

[iridiumx 0]

Hey! Thanks a lot for the tip! It works!

It Snaps to the correction position. just 90 deg rotated, which I could rotate back manually easily.