Bambu Studio slices inner wall in mid-air on overhang layer

I am printing a test model with an overhang which has a hole in the middle.

Problem: When slicing the overhang, Bambu Studio tries to print the wall for the hole in thin air, instead of printing the overhang/bridge first.

Bambu Studio Verson: 1.9.1.66

Layer under overhang:

Overhang layer with hole:

Inner wall is printed before bridge:

Suggested Solution: This should be avoided by slicing a better path (detect floating wall and print last on applicable layers?), and/or the user should be warned about the problem.

I spent a long time adjusting settings to try and fix the problem because I did not expect the slicer to do something like this. Now that I noticed the issue, it’s printing quite well with “print infill first” turned on.

The floating hole slicing problem has been around for a long time.

2 Likes

Thanks, that makes sense. I tried to find topics covering this, but I wasn’t searching for the right thing.

It would be really great if Bambu Studio detected this problem, warned the user, and at least linked to some documentation to describe potential solutions like the one you provided.

It should be fairly simple to detect, since it’s trying to print a wall in thin air with a significant gap from the last layer?

Hopefully this would save other newbies from wasting as much time as I did on this.

Not sure if “convert holes to polyholes” setting in orca slicer has any bearing on this, but I only just today became aware of that setting’s existence, so I’m just mentioning it in case it’s relevant. Probably offpoint, but I won’t remember to mention it here later.

I haven’t tried it yet but Orca 2.0 added a setting for counterbore holes.

Indeed it does: