Bridging turned off and Bridge Speed not available when part has no top or bottom layer
Title says it all. Unless a part has at least 1 bottom layer or 1 top layer, bridging is turned off. Nor can you select a Bridging speed. Which would follow from it being turned off I guess.
I am running Beta 1 right now but the problem first surfaced in the Alpha versions. I just did not have time to come here and ask. I ran several tests and bridging is indeed not occuring, stuff sags everywhere.
This is easily repeatable. Put in a solid part, select 0 top and 0 bottom layers, and bridging stops. And the Bridging Speed option is grayed out.
Any solution?
RE: Bridging turned off and Bridge Speed not available when part has no top or bottom layer
If there are no tops or bottoms then bridging being off shouldn't be a problem as there's nothing to sag is there. You say its easily duplicable but can you please attach a zipped up priua slicer project file (3mf) that demonstrates your problem. If you have to open a bug report on github then it will require the 3mf project anyway so you may as well do one.
RE: Bridging turned off and Bridge Speed not available when part has no top or bottom layer
Here is one example.
RE: Bridging turned off and Bridge Speed not available when part has no top or bottom layer
That's not exactly a simple model. For a start its using one of the special modes added specifically for non valid geometry. That request took literally years to happen. You are also asking it to print geo that is hanging in the air if you turn off top layers (the oval shapes inside). You cant have it both ways without lots of extra special exceptions. You want it to print stuff mid-air then you turn on the layers needed to support it. 2.6 is giving out all the expected warnings for trying to print a non printable (with the current settings) model.
I note that one part of it is printed as a overhang (bottom of FF5) when sliced with the alpha/beta (2.6 versions) but that's due to the new add perimeters on overhangs algo and even as it is in 2.6, it will need support as it cant do those curves floating, those are just going to fall down. No matter what mode its sliced in. Looks like a candidate for that new horizontal experimental print technique that's not in any slicer yet.
You had better go request another change to the special slicing mode to do what you want. Good luck. I suspect it will be several more years. The PS github is at https://github.com/prusa3d/PrusaSlicer/issues You will have to explain very clearly exactly what changes you would like to have even a chance for the devs to consider making them.
RE: Bridging turned off and Bridge Speed not available when part has no top or bottom layer
Actually the request is simple, just don't turn off bridging when a solid has no top or bottom layer. The implementation might be something else, I have no idea. I do know that the example I posted is exactly the way most 3d printed RC aircraft are designed... as solids printed with one perimeter wall. The reason for the layer modifier is because of ANOTHER problem with PrusaSlicer's bridging code, but just the opposite of the above..... not being able to turn it off. All this was handled easily in S3D (and might still be) but I am trying to move to PrusaSlicer for everything because S3D sat on their hands for years, then tried ripping people off. PS is doing almost everything I need, but the way PS handles bridging is beyond puzzling to me.
RE: Bridging turned off and Bridge Speed not available when part has no top or bottom layer
Please define what you call bridges, that project sliced in the beta has overhang perimeters, coloured in the dark blue, those are using your defined bridge flow of 0.3 already. PS has 2 types of bridging, internal which is the light blue coloured extrusion and perimeter bridges the dark blue. Without infill or top and bottom layers it won’t do internal bridging, but that is perfectly logical as you have defined that you don’t want top or bottom layers as internal bridging is only there to provide support to those top layers.
That leaves bridge perimeters. A bridge perimeter goes in a straight line from point A to point B. As that’s the only way it can be printed in a classic system, with it stretching between. That project has none of that in its geometry. I still can’t see what else you expect PS to do. Maybe if you posted a side by side comparison to S3D and how it slices it, highlighting the differences.