I am very new to Bambu Studio, I am trying to make some models to upload here but when I am slicing them the colors are crossing over into other parts of the model. It does not happen with all the models and only some parts of a model. I can’t figure out what is causing this to happen.
As you can see with image 1, that is how it should look all the way up on the model. By image 2 (2nd layer) you can see the blue color starts crossing over into the pink part of the model. It progresses all the way thru the model, until the last layer you can see the color blue is in place of the color pink on some parts. Also the top layer is showing a bit of blue underneath the pink.
I’m imported this model as a obj file for color import using the .mtl file. I also tried saving it as a .stl and painting it by hand, I am still encountering this issue. Is there a setting I’m missing?
Thanks,
Make sure Purge Into Infill is off.
You need to Assemble (pre BS 1.9) or Merge (post BS 1.9) all of the parts so that the slicer knows that they are one piece. Select each part while holding Ctrl and then right click and select Merge.
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I have all 3 unchecked.
Flush into objects’ Infill
Flush into this object
Flush into object’s support
yet it still does the same thing.
This model is only 1 part, so there are no multiple objects to Assemble or Merge. If I hold down Ctrl and right click the only model that is there, it does not give me an option for Merge.
I’m using Bambu Studio 1.9.1.66
Are you able to provide the .3mf you are using?
The OBJ import with .mtl file colouring is pretty new so there may well be bugs.
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I second this.
It seems to be a problem with colouring.
The best approach would be to set the colours by object.
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Ok, I think I found a solution.
I selected the object (obj file) and I right clicked on it and selected “Split” then I went to “To Objects”.
What that did was separated everything all over again into their own object. Then I selected each part individually and went and painted each object separately in Bambu Studio and it worked.
Only issue is, if I select all the objects again and select merge to make it one model again, then it does the same thing again when I slice it. Only way to get it to work is for it to think each part is a separate object.
Yet that might pose a problem as it might not properly join the parts when printing, and it will make a mess as there will be so many object names for the build plate as each plate will have more than 1 model on it.
I went thru the process again and I split it based on parts and not objects, it seemed to bring the seams (edges) of each independent object closer together and it grouped them up under the plate section to the right and it slices just fine now, I just can’t merge them or it will mess up again. I think I can live with that. Thanks for your help appreciate it.
When I first created this object in Fusion 360, each object had it’s own color painted in Fusion, then went and imported it in, I didn’t have any issues till I went to slice it.
It seemed more of a model issue than a coloring issue, which is weird because I erased all painting started fresh to see if that would work and redid the coloring in Bambu Studio this time and it still had an issue.
It only worked is when I went and separated the model in Bambu Studio based on parts and then assigned the colors all over again to each model individually and didn’t merge them back together.
I thought maybe I had a rogue face somewhere inside the model to make it think it needed to paint that part of the inside, but I went over and checked it again and did not find any issues with it.
When you color all the models separately, once joined the colors will be inside the other pieces. Maybe try joining all the pieces, then color the parts you want. It might take longer, but should give you the results your looking for.
I tried that as well, still had the same issue, just not as bad.
I also saw other users have this type issue and IMO it is an issue in the way the part(s) had been created in Fusion and somehow Bambu studio ( Orca Also ) creates for some reason overflowing regions when coloring those part(s). I’ve tried several versions myself but To date I was not able to recreate the problem with my own designs.
A few questions for you,
-was the design done from scratch or via a modified imported stl model?
-is it done as one part with separate bodies or everything as one body or done as a part assembly?
-Are all joining edges fully defined and/or done from a base layout sketch?
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It was done from scratch in Fusion 360.
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It was done as one part with separate bodies, I also tried doing it as one body (everything combined together).
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They are all done from a base layout sketch.
What I did was created a sketch on the plane. Then I drew out a series of squares using the rectangle tool (say 10mm x 10mm) for example. Then started extruding up the squares into blocks till the height I needed. Some blocks I joined together some blocks I left as a “new body” (easier for painting). I even had blocks ontop of blocks, sketching on the face of that block to make one onto of the other one, almost like what a Minecraft model would look like. In the end I tried joining all of them together to see and I still had the problem.
Thanks for your reply, in the meanwhile I did some tests with this model I created in Fusion:
and I saved it as 3MF, STEP, and OBJ
3MF and Step worked without problems in Bambu Studio except that the colors had to be added manually to the components but that was not too complicated since I labeled the components and bodies with color names which are imported in to BS
The OBJ file imported with the colors which it asked to assign/confirm but for some reason it imported the model at 1/10th size thus needed resizing. Slicing it then got me a winner in that the sliced geometry of the colored sections are screwed up like you experienced:
I then split it into components reapplied colors and then merged them which fixed the issue but since it doesn’t have the color labels anymore is a PITA to do therefore OBJ right now not a good option to do this with.
Edit to add: I posted a bug report on the Bambu Studio Issues Github site since it gets more attention by Bambu there
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Nicely done! Very thorough testing.
I have tried .3MF format before but that creates a gap in the model between each
component for the 1st layer, which might show up as print lines on the part of the model that touches the build plate.
The way I got it to work was either the .step format you mentioned, or the obj format that I mentioned. Both needs to be split into parts so you can get separate components but not merged together (otherwise the colors will overlap), then color applied afterwards to each components.
