Bridging Confusion

[czucker]

Hi Folks,
I am experimenting with bridging and suspect that I not thinking about it properly.

I have a cube that I am printing with one perimeter (.8mm nozzle), 0% infill and some top layers. I would expect that the top layers would bridge, but when I slice the initial top layers show up as solid layers. . . .

Am I doing something wrong?

Thanks,
Chris

[CompoundCarl]

It's only a bridge if there is nothing below that part of your 3D model. It doesn't matter if you use 0% or 50% infill, it is based on the model itself.

Maybe you should hollow out your model instead of using 0% infill. That way they would actually be real bridges.

[czucker]

Thanks for the info.

I'm still not completely sure I understand. Take the attached factory file for example. This is a hollow object, with 0 bottom, and the top layers still are not bridging. . . .

https://drive.google.com/file/d/0B5G4LM ... sp=sharing

[CompoundCarl]

That model bridges fine for me... Switch your preview to "Feature Type" coloring, so that it's easier to see. But frankly, it's a circle. So it doesn't really matter if your bridging or not since there really isn't an ideal direction to print in. All directions would be identical

If you're still having trouble, post your factory file (File > Save Factory File)