Object doesn't fit – but it should fit!
 
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Audax
(@audax)
Active Member
Object doesn't fit – but it should fit!

Why? The Object should fit!

Posted : 20/08/2025 9:48 am
_KaszpiR_
(@_kaszpir_)
Noble Member
RE:

what's on the left side that is hidden?

also it looks like overhangs are outside of the bed

See my GitHub and printables.com for some 3d stuff that you may like.

Posted : 20/08/2025 3:09 pm
Audax
(@audax)
Active Member
Topic starter answered:
RE: Object doesn't fit – but it should fit!

There‘s nothing outside the bed. Look at the dimensions at the right side of the picture. They’re smaller then the actual bed size.

Posted : 20/08/2025 3:37 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Object doesn't fit – but it should fit!

could you please attach your project file, including the model, as a zip file, on the forum

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK

Posted : 20/08/2025 4:02 pm
Audax
(@audax)
Active Member
Topic starter answered:
RE: Object doesn't fit – but it should fit!

It's only the "Haube" part.

Archiv

Posted : 20/08/2025 5:07 pm
FoxRun3D
(@foxrun3d)
Illustrious Member
RE: Object doesn't fit – but it should fit!

Have you tried auto arrange. If that can't fit the object it is too large after all. But with the 3mf we can see what's going on.

Formerly known on this forum as @fuchsr -- https://foxrun3d.com/

Posted : 20/08/2025 9:24 pm
Mike B
(@mike-b-3)
Estimable Member
RE: Object doesn't fit – but it should fit!

Check the build plate size specified in the printer section.  The MK4 build volume is 250 x 210 x 220 - perhaps PS is still using that build volume instead of the Core One volume?

Prusa MK4 since Jan 2024, Printables: @MikeB_1505898

Posted : 20/08/2025 10:08 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Object doesn't fit – but it should fit!

try setting the number of skirt loops to '0'

the skirt loops are placed outside the model making it bigger than expected. 
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK

Posted : 20/08/2025 11:34 pm
1 people liked
Audax
(@audax)
Active Member
Topic starter answered:
RE: Object doesn't fit – but it should fit!

 

Posted by: @foxrun3d

Have you tried auto arrange. If that can't fit the object it is too large after all. But with the 3mf we can see what's going on.

Of course.

try setting the number of skirt loops to '0'

Check the build plate size specified in the printer section.

Posted : 21/08/2025 7:13 am
_KaszpiR_
(@_kaszpir_)
Noble Member
RE: Object doesn't fit – but it should fit!

Set no skirt, no brim, so it is the only object to be printed.

Object size 220, bed size 220 - that may be a problem, set bed size to 221 and try again ( I believe core one should have those extra millimeters out there...). I once had an issue on the Mini and had to change that to force fit the print.

If that does not work you will have to shave off some model with using negative volume on the side to make it fit, or rotate object vertically.

See my GitHub and printables.com for some 3d stuff that you may like.

Posted : 21/08/2025 8:12 am
FoxRun3D
(@foxrun3d)
Illustrious Member
RE: Object doesn't fit – but it should fit!

Skit/brim are set to 0, so OP is okay.When positioned to lie flat and rotated 90 degrees, the object size is 238.46 x 220, so should fit (Core One sheet is 250 x 220). But it doesn't like the 220 size in y direction. If you scale it to 219.6 y-size, it sliced okay. Feels like a bug. I would report it on GitHub. Given the size of the object I would probably just try to print it with 219.6, and it will probably fit just fine with the other parts.

Formerly known on this forum as @fuchsr -- https://foxrun3d.com/

Posted : 21/08/2025 11:07 am
Audax
(@audax)
Active Member
Topic starter answered:
RE: Object doesn't fit – but it should fit!

I reported a bug on GitHub. Thanks to all.

Posted : 21/08/2025 1:55 pm
Neophyl
(@neophyl)
Illustrious Member
RE: Object doesn't fit – but it should fit!

That's not the Prusa slicer project file 3mf is it ?  When I load it it just gets the geometry on whatever printer I have selected at the time.  In this case a Max with a 420x420 bed so it fits easily :).

The reason we ask for a prusa slicer project file is that also includes all the profiles, so your print settings and printer etc.  Anyone opening a saved PS project basically gets every setting and modifier/placement etc you are using.  If I wanted to debug this then I would have to install a core one printer too.  

As the others say I suspect this is a bug, in that the logic should be if object bounds are 'less than or equal to bed size' then its ok.   What it appears to be using is 'Less than bed size'.  Increasing bed size to 220.01 is enough to slice, at least on a printer profile I cobbled together for testing purposes.  Without installing a core one profile and modifying that though the result is more of a supposition of concept.

Posted : 21/08/2025 7:26 pm
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