mmuntean

This is occurring in Cura 4.8.0

I am having the same problem. Model slices, but when I go to PREVIEW window the entire window is blank white. The time play line at the bottom is there, as well as the layer slider on the right, but no image. I can send the print to the printer and it prints. Seems to be an issue with the display of the PREVIEW.

FYI... tried rotating the combined model at every 45 degree position and this had no impact - the dominant disk always remained the same. Perhaps the issue is object list order based on alpabetical.

I saw the same post about the order of printing of multiple models. I tried rotating the test objects about the Z axis 180 degrees and resliced but it did not change the dominant object. I also tried loading each half in a different order, but it confirmed the object list is alphabetical. One thing I might try is to rename the objects to change the alphabetical order. Perhaps I need to accept that my models really need to be on overlapping in TinkerCAD. The Cura solution would have made the process somewhat easier.

Thank you. Found the mesh settings and am able to have one cylinder dominate. I am not sure how Cura selected which object to use to dominate in the the overlapped area. In this case Cura has selected the magenta cylinder to dominate, which happens to be the first object in the object list (coincidence?). Is there a way to specify which object actually dominates? Perhaps by reordering the object list?

So now a new question related to Cura and overlapping objects. To create a two color object I am manually design two perfectly interlocking and non-overlapping models in TinkerCAD and then export each model as a separate .STL file. I open the two files in Cura, merge the two objects into group, and then rezero them to the work surface and position as desired in XY. Now using CMD-Right Shift I can select either submodel and assign a filament.color. All good. It would be easier however if I did not need to do all the work of assuring carving our the exact holes for any inlay or overlap. Say for example I want two cylinders to overlap slightly and be different colors, with one "dominate" and filling the area of overlap. (see below) I would like to be able to simply import two complete overlapping cylinders, and instruct Cura to have one take precedent over the other in any overlap area to create the desired split color model. Any way to do this with Cura? Cura seems to simple alternate layers... Which ever color is current printing will print first and color the full circle on that layer. The second color will then print the corresponding crescent. When it moves to the next layer the second color is active and takes the full circle. It ends up looking like a deck of shuffled cards...

Yes, the CMD-left click did work for selecting sub models in a group - THANK YOU.

I just discovered that if I assign the extruders to the models after opening but BEFORE merging the submodels in the group they appear to retain their separate colors after merging. Here is the project - labels for a herb garden.

When the models are grouped, ctrl+left mouse brings up the menu to select/group models. I do not see anyway of assigning an extruder to submodels without ungrouping. Note that I am on MacOS and perhaps this may be different on Windows. I also found another issue. When I merge the models to bring them into alignment, Cura also drops each model flat onto the bed. This is a problem. I have a model that is floating on top of another model (letters printed on a top surface). The dropping of this model to the bed embeds it in the underlying model. Seems like the only method is to manual raise of the Z position of the desired model. Overall the workflow from TinkerCAD though to Cura seems flaky to me. The set of models are perfectly positioned in TinkerCAD. This should simply work.

I verified that those two options are both disabled in Cura preferences, but the problem still occurs. I think based on this thread it appears to be some issue with Autodesk (Fusion360 or TinkerCAD) and Cura. Note that I am using Cura on MacOS... not sure if this makes a difference.

I too have had the same problem, but with TinkerCAD (which is also a Autodesk product like Fusion360). I designed a two object model in TinkerCAD in order to print it with two different color filaments on a Ultimaker S3. These objects are nested together and aligned perfectly in TinkerCAD. I exported each part separately as .STL files. I then open these two .STL files in Cura. Cura places them at different positions - not aligned as they were in TinkerCAD. The solution first step in Cura is to right click and select "Merge Models" which snaps the two models into the desired congruence, but makes them one object which prevents separate two color/filament printing. To solve this, I next select "Ungroup Models" which re-separates the objects BUT keeps them in the same correct nested position! This is what I was hoping/expecting in the initial file opening. I hope this may help others. I spent a lot of time trying to solve this weird quirk. I do not understand why Cura does not just bring them in aligned as they were exported from TinkerCAD. I suggest this is a "bug" or at least a very undesirable feature of Cura. Some enhancement of Cura is warranted to allow the user to control this. Thanks to those comments above in this thread that lead me to this solution.