Printing top layer using bridging settings

[nic]

I want to print an object with minimal infill, but when I do so the top layers sag - to be expected. BUT, from my bridging tests I can span distances well greater than this top layer distance with no sagging. So why is it I can bridge layers in the middle of the print for a long distance, but the top layers can't go that far?

I have my bridging settings at 150% speed, 90% extrusion. How do I tell S3D to use those same settings when printing the same top layer? I'd rather not add extra infill.

Thanks!

[kabali16]

That is because these layers are not detected as bridges by default. You can use multiple process - Start and stop height feature to split the top process . And for the top process, you can control the fan speed, print speed etc similar to bridging overrides.

[brian442]

The top layers have their own adjustment settings. You can set the "solid infill underspeed" on the Other tab if you want to print that layer slower for better performance.