any way to increase bridge infill overlap?  

Re: any way to increase bridge infill overlap?

I tested many settings now, and did find a temporary workaround.

The problem still exists within the Prusa Edition Slic3r software and will continue to exist for other people and in other situations for myself, and should be investigated by the Prusa Slic3r team. I would be happy to provide the Model and copies of my settings, both the ones that fail and the ones outlined below that slice as anticipated/desired and succeed when printed.

I changed layer height, from 0.2 to 0.32 and the model is sliced entirely different. The bridge now flowing over 2 internal perimeters of the exterior shell, adhering properly when printed. On the 0.2 height,with "detect thin walls" enabled the slicer makes a deviation from the STL design and slices an 2 vertical width hollow in the internal perimeters of the models exterior shell skipping the 2nd and 3rd of 4 perimeter. This unanticipated hollow is NOT printed when "detect thin walls" is disabled, but does print when it is enabled. As this model is just a test portion of a larger model that does have thin walls in the parts that I am not attempting to print during my attempts at rectifying this bridge slicing problem, this is not a "solution" to my problem.

The STL model does not have this hollow and is designed to print solid walls, and does slice with solid 3 shell perimeters in the 0.32 layer height setting. It also prints all 4 shells when "detect thin walls" is disabled on the 0.2 layer height, but as the full model has thin walls, it is not acceptable solution to disable it. This "thin wall" hollow at 0.2 layer height is causing the wall shells to slice at the bridge layer with its own ~1mm bridge, which is sliced to print AFTER the ~50mm brige across the interior hollow of the design. this 1mm bridge over the gap between the unanticipated hollows seen in the initially posted image, causing the bridge over the interior cavity to slice so that it does not connect at all to any of the perimeter, as seen in the initial image, the slicer prints the interior bridge prior to the the 1mm bridge connecting the wall shells. This entire unfortunate slice would be avoided in only 3 ways that I can conceive.

1. If the model was designed in a way to hit the exact "thin wall thicknesses" shown in the "vertical shells" section of the "Layers and perimeters" menu, unfortunately I am unable to design it with this exact thickness, as this designed object fits within a hollow in a pre-existing metal object of exact dimension, and also itself contains a magnet of exact dimension that cannot be reduced in size without shattering, to meet the "thin wall thickness closest to the "1.67mm threshold for 4 lines"

2. If the 3rd option below is infeasable to provide, then the 1mm bridge connecting the external and internal "thin walls" should be printed in the layer below the main bridge layer, providing a surface for the main bridge to be overlapped sufficiently with and then in the bridge layer the main bridge over the designed cavity should be printed with overlap into this previously printed thin wall bridge.

3. My preferred outcome, and probably the most difficult from a software perspective would be for the slicer to adjust the flow rate of walls that are greater than 1 perimeter, so that it could print the model as designed, with a 1.5mm wall thickness, without printing the walls with the unanticipated hollow and without requiring the thin wall thickness to be designed to specific pre-determined recommendataions or face failure

RE: any way to increase bridge infill overlap?

Try this post, it worked for me, just uncheck "Ensure vertical shell thickness"

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/avoid-solid-infill/#post-130687