Hi, I am printing multiple parts of a bigger model that I design with Blender. I cut the parts with Blender bisect tool and then create Stl files that I send individually to Cura. Once in Cura I rotate and snap to build plate to optimize my printing. I never change the scaling but In a few occasions I end up with printed parts that do not fit the others and not by a small margin. Does any one know a way to keep the size while rotating the object?
Can you be more specific when you say “do not fit”? Are these parts that are meant to snap together/there are keys to bring them into alignment?
Have you tried printing the pieces individually to see how they fit together?
I suspect that they’re are not scaling, just that the keying requires a higher resolution than the tolerance of your printer.
no they are simple geometric parts. They don’t snap together and there is no key to align them. I usually just align them manually and glue them and they fit within a couple of mm.
Here the problem is that they seem to print at a different scale.
I see it on the Cura build space, let’s say when I load my model it displays a size of 173.7 x 36.4 x 147.9. at the bottom left corner of my screen. When I start rotating it, the size changes at the bottom of the screen. Even if I don’t rotate it and just use the select face to align to build plate I get a new size of 179.9 x 76.3 x 100.8. What am I not getting?
That’s quite a difference as well as a significant distortion in the differences between the dimensions. Can you post screenshots of what you are seeing? I would think the (more than) doubling of the Y dimension should be pretty obvious.
I’ve never experienced anything like this when I use Cura. By the way, which version of Cura are you using?
You might try Prusaslicer. It has a cut function built in. You could export the part cut it on prusa slicer and keep both halves. conversely cut at a specific point keep and print one half then cut agaon at the same point and keep and print the other.
This eliminates software issues with cura and meshmixer.
Thank you for the screen shots - they really convey what you are doing.
When I look at the rotations you are putting the irregular object through I am not surprised that the dimensions that Cura is presenting have such radical changes as each dimension has a different face.
Personally, I don’t think that you’re seeing an actual change in the dimensions of your object, but I think you’re going to have to print out a couple or three to verify this. I suggest you print with minimum infill (is 10% possible?) and the thinnest walls that you can select. You will have to use supports for some of these rotations.