Solid model turns into hollow when cut with a cube hole.

[dsptech11-prog]

Imported step file model becomes hollowed out in Layerling but not in Tinkercad when removing a the top section via cubed hole.

[Beoir]

I have a similar issue simple box with a counterbore displays as two entities.

Box is solid, counterbore is empty space. If I try a Boolean combine every effort produces a solid for the counterbore. While attempting to do multiple examples to post here I grew tires of copying individual items so I decided to group them and the counterbore was removed from the box??? it was a WTF moment for me. Saving example files in different formats and to post opened as cut holes. examples

follow

[henmedia]

@Beoir, welcome. If I read your pictures right: the counterbore is a hole (the grey disc in the first picture), and Group (Ctrl+G) cuts it out of the box, which is your last picture. The one with only the counterbore's plug is what Boolean Intersection gives; it keeps only the part that two shapes share. So to cut a bore you need a solid box, a hole and Group. The guide shows it with a cube and a cylinder. What I do not understand is the part about saving in different formats: which format, and what did you open it in? If you attach the design as a .lyl file, I can look.

Thank you for trying so many examples; to keep layerling going, a small gift is welcome at https://layerling.com/support.html.

[henmedia]

@dsptech11-prog, welcome, and thank you for the pictures. They show the top of the part cut off and its inner walls and the four cups open. From the pictures alone I cannot tell whether the part should be solid inside. Could you attach the STEP file? If you cannot share it, click Bug report in the footer of layerling and attach that ZIP; it holds the design with the imported part. Then I can make the same cut here and see why layerling shows it open where Tinkercad does not.

If you find layerling useful, you can help the project along at https://layerling.com/support.html.

[henmedia]

@dsptech11-prog, thank you for the files, they showed it. Your STEP part is not a closed solid after the import: its surface has small gaps (143 open edges). layerling's cut needs a closed solid; when it does not get one, it falls back to a cutting method that opens the part but does not close the cut face, so the inside shows. I could reproduce it here with your file. Tinkercad probably repairs such gaps first.

Something you can try: export the same part from Fusion as STL or 3MF and import that instead. Such a file is usually a closed mesh, and then the cut should leave a solid face. Please tell me whether it works.

Meanwhile I changed the message after grouping: when a cut stays open because of gaps like these, it now says so, with the number of open edges, so the open inside is no surprise. It comes with the next release.

[henmedia]

@dsptech11-prog, the message after grouping a part with gaps is in 1.74.0: it now says that the cut face stays open and how many open edges the surface has. Reload the page to get it; the installed app needs a restart. Please tell me whether the STL or 3MF from Fusion cuts cleanly.

[dsptech11-prog]

I used Onshape to isolate this component from a larger cad file.
I went back and exported it as a 3mf and an obj and both cut properly.
I did reload to the new release.
I also have another model in that project that was imported as an stl file.
That model exhibited the same issue (blue shorter items) but this time a popup message showed just as you described explaining why.
The imported stl has open faces apparently.

[henmedia]

@dsptech11-prog, good that the 3MF and the OBJ cut cleanly, and thank you for trying it. For the STL, the message is the same thing seen in a second part: its surface has gaps, so the cut stays open. If you still have that part in Onshape, export it as 3MF the same way; that gave a closed mesh for the first one. If you only have the STL, a mesh repair tool (many slicers have one) can close the gaps before you import it.

[dsptech11-prog]

Thanks for examining the step file and finding the problem. I loving the way Layerling is coming along so quickly. Keep up the great work.