burtoogle

In case you don't trust Cura's analysis, here's what freecad thinks...

Neither are manifold and so cannot be expected to print without problems.

Hi, thanks for the model. Well, I sliced it using my normal settings and it looks OK, here's the last layer of the hole... Here's the same model with the remove all holes setting enabled, perhaps you have done that?

Hi, could you please attach the model file to this thread? Thanks.

Could you please attach the stl file so it can be checked with another program? Thanks.

Thanks for the file. I loaded that project, set top surface skin layers to 1 and then set the top surface skin speed to 20.... The speed is hidden unless the number of top surface skin layers is > 0.

Please save the project file (File -> Save) and attach to this thread so we can see the settings you are using. Thanks.

Relative extrusion has nothing to do with volumetric stuff. Equalize Filament Flow is closer in concept.

This looks like a long standing bug (not mine, honest!) that has been woken from its slumber by a recent change I made to the wall print ordering. I have a fix which I am testing and, if that goes well, will submit to be included in a future release. A workaround is to disable the wall order optimization.

Thanks for the file. I am investigating...

I have managed to workaround the various limitations and bugs in the graphic library and now have quite a nice display. It still has some compromises compared to the other builds (Linux/Mac/Windows) and it's definitely a bit sluggish if the model is large but for small models I think it's preferable to the compatibility mode display. YMMV.

Could you please save the project file (File -> Save) and attach the .3mf file to this thread? Thanks.

It only generates sufficient walls to fill the space. Unfortunately, at the present time, Cura doesn't handle the situation where there is not space for an even number of walls very well. This defect is well known and the UM devs are currently beavering away night and day to come up with a solution.

There was a recent change that made support render slightly transparent so maybe your graphics hw/sw has some problem with reduced alpha and just doesn't show anything?

Thanks for the file. The model isn't watertight so it's not surprising that it is missing pieces after slicing...

Please save the project file (File -> Save) and attach the resulting .3mf file to this thread. Thanks.

BTW, if you have the mesh tools plugin installed, you can rename selected parts so that the mesh names make more sense. Just right click on the part and use the mesh tools portion of the context menu.

Thanks for the file, I sliced it and then searched for MESH... ;MESH:ThreePartNameTest.3mf(2) ;MESH:ThreePartNameTest.3mf(1) ;MESH:ThreePartNameTest.3mf ;MESH:NONMESH ;MESH:ThreePartNameTest.3mf(2) ;MESH:ThreePartNameTest.3mf(1) ;MESH:ThreePartNameTest.3mf ;MESH:NONMESH ;MESH:ThreePartNameTest.3mf(2) ;MESH:ThreePartNameTest.3mf(1) ;MESH:ThreePartNameTest.3mf ;MESH:NONMESH ;MESH:ThreePartNameTest.3mf(2) ;MESH:ThreePartNameTest.3mf(1) ;MESH:ThreePartNameTest.3mf ;MESH:NONMESH ;MESH:ThreePartNameTest.3mf(2) ;MESH:ThreePartNameTest.3mf(1) ;MESH:ThreePartNameTest.3mf ;MESH:NONMESH and so on

I have this installed, not sure I have ever actually used it. https://github.com/paukstelis/OctoPrint-Cancelobject

Could you please save the project file (File -> Save) and attach to this thread? Thanks.

Exactly! Look at all the faces it has to choose from. Can you guarantee that they are all aligned horizontally?

I just got a failure when I selected a face on one of the short arms rather than the longer piece. Perhaps the arms are very slightly wonky (technical term) ?

I tried it a couple of times and it worked OK for me.

Cura and Octoprint already support this feature... Look for ;MESH comments in the gcode.

Cura does lots of "tricks" but in this regard it is straightforward. The outer walls will be inset 1/2 of the line width from the outline of the object so, in theory, the object should have the correct outer dimensions. Of course, that assumes that the printer motion is perfect and the extruder calibrated, etc. so, in reality, it is normal for the object to come out slightly the wrong size and some tweaking may be necessary. This is FFF printing, after all.