I have a Bambu Lab A1 and I’m pretty new to 3D printing and using slicing software. I have been editing a model of a video game map (gm_construct from Garry’s Mod) in blender for printing.
I have encountered a problem in which a section of the model that (to me) looks like it should clearly be a bridge is instead being sliced as an overhang. This lead to that section of the model being pretty mangled upon printing.
Here is an image of the model in blender pre-slicing:
I’ve tried changing the layer height, wall generator (classic to Arachne), line width inner/outer, and enabling support all to no avail. I’ve also tried slicing it in orca slicer with the “Detect overhang walls” setting turned off and it just marks it all as outer walls with nothing underneath.
Is there a way I can encourage the slicer to recognize the beams as bridging sections? I’m really not sure which settings in Bambu Studio would help. Maybe I need to tweak the model slightly in some way? Any tips would be appreciated!
There are a whole bunch of related issues at play here. There is buggy behaviour that has been present in BS and Orca for a very long time. I think everyone runs into this.
Upon further reading of the github thread posted above by movingimage, I fixed the issue with Orca slicer by setting “Bridge counterbore holes” under Quality > Bridging to “Partially bridged”.
I ran across this while trying to fix an issue with Bambu Lab slicing an overhang as overhang walls on the outside edge, with bridging between them. (Think of a circle recess with a roof - the roof was made up of two overhanging walls, with bridging filling the rest of the circle. The unsupported overhand walls didn’t have anything to stick to, causing them and the bridging to fail.) I fully expected the entire overhang to be sliced as a bridge.
I found a solution as follows:
I added a .4 mm thick modifier with zero walls and 100% infill across the entirety of the two layers where the bridge begins. This caused the slicer to treat what would have been walls as solid internal infill and everything else as bridge. I probably could have restricted the modifier to just the pertinent areas, but this was easier than creating multiple modifiers for different overhangs.
