odd slicing decisions
So, I have found what seems to be odd slicer behavior to me. Not sure if this is the correct place to post this but maybe it will catch some attention.
I am trying to print a case for a deburring tool and I randomly selected 5% infill. As you can see in the pictures the software needs to create a "floor" for the tool to sit on in the case. In order to do this with the infill, it creates a "sub-floor" for lack of a better term. It does this in a single layer though and then when it starts to define the shape of the actual "floor" it lays down its first layer parallel to the "sub-floor". This fails almost immediately due to the sagging of the long bridges of the "sub-floor" and the air gaps it creates when trying to run a new line parallel to it.
My question is why wouldn't the "sub-floor" be at least 2 layers thick and 90 degrees offset from each other, and why would you run the first layer of the "floor" parallel to the "sub-floor" in any scenario? Both of these behaviors seem strange to me and at odds with logic.
Thoughts?
RE: odd slicing decisions
That will be bridge infill, which would be easier to spot if you had the key set to feature type. As you have it set to height you can see that its actually 0.4mm thick, the same as your nozzle and not 0.2 the same as your normal layer height.
As to why its making these decisions, well without your project file to examine its going to be hard to impossible to say or figure out anything. There could be many factors. You might be forcing the bridging angle for example in your settings. Something we could check easily with a saved project. There might not be enough space to get the required layers in, there might be..... you get the point.
If you want better answers then you need to use File>save project as to save a PS 3mf file. Then take the 3mf and ZIP it up and attach it here. Must be zipped or the forum wont accept the file.
The forum is for user to user help. If you really think there's an actual bug then you would need to raise it as an issue on the prusa slicer github. After first checking to see if there's an existing matching one either open or closed of course. As there are currently over 1600 OPEN issues its likely to be already reported.
There are several raised already about bridging angles but lets see the project first before going and adding to the github load.
I will say just from your pics that 5% infill for large flat areas is not enough. You will get sagging, even with 5 or more top layers thats not enough to recover in time. Especially with a Mk3/4 printer as the cooling isn't stellar.