Increase Bridge Density Maximum #1697

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MrUnknownDE · 2026-04-05T19:13:42+02:00

MrUnknownDE commented

2026-04-05 19:13:42 +02:00

Originally created by @MakeSometh1ngWonderful on 11/5/2025

Problem

Current External bridge density is capped at 100%. During printing, this causes bridge spacing to be too large, reducing binding between lateral lines. The evidence for this is the general behavior of loose stringy bridge lines, seen here:

Print profile set to default, except that Thick internal bridges is unchecked, and printing speed for the white filament is set to 10mm/s.
Bambu X1C, eSun Basic PLA.

Solution in this PR

Increasing the maximum of External bridge density allows users to experiment with bridge tuning and potentially identify an ideal setting that is currently not possible.
For example, these are tests carried out under the same test conditions, but with increased External bridge density.

And these tests show a sample of the tuning that is possible when manipulating bridge flow and density above 100%.

Prior work

Previously, I demonstrated a workaround for the standard performance that was related to bridge flow manipulation and low bridge printing speeds. This work has been replicated by dozens of Bambu Studio users with evidence here.

Why is this an unsatisfactory solution? Because, it has a tendency to cause over-extrusions over walls, which require yet another workaround.

The solution in this PR is the simplest path forward, in my opinion, because it allows the users to use lower bridge flows and attain superior bridge smoothness through spacing manipulation.

It also involves a single character code update, and a tool tip update that highlights more customizable slicer behavior.

This work was tested and enhanced through dialogue with @ianalexis.

*Originally created by @MakeSometh1ngWonderful on 11/5/2025* Closes #11209. ## Problem Current External bridge density is capped at 100%. During printing, this causes bridge spacing to be too large, reducing binding between lateral lines. The evidence for this is the general behavior of loose stringy bridge lines, seen here: ![IMG_20251105_121242159](https://github.com/user-attachments/assets/d27a17ad-cfb4-429b-832f-0edb7b6712df) _Print profile set to default, except that Thick internal bridges is unchecked, and printing speed for the white filament is set to 10mm/s. Bambu X1C, eSun Basic PLA._ ## Solution in this PR Increasing the maximum of External bridge density allows users to experiment with bridge tuning and potentially identify an ideal setting that is currently not possible. For example, these are tests carried out under the same test conditions, but with increased External bridge density. ![IMG_20251105_121355659](https://github.com/user-attachments/assets/674a4069-f382-474e-b1e0-caad7875ae32) And these tests show a sample of the tuning that is possible when manipulating bridge flow and density above 100%. ![IMG_20251105_121420518](https://github.com/user-attachments/assets/0658325a-069f-43c4-be11-b8ff1bb7e349) ## Prior work Previously, I demonstrated a workaround for the standard performance that was related to bridge flow manipulation and low bridge printing speeds. This work has been replicated by dozens of Bambu Studio users with evidence [here.](https://makerworld.com/en/models/1916063-unsupported-bridge-experiments#profileId-2055448) Why is this an unsatisfactory solution? Because, it has a tendency to cause over-extrusions over walls, which require [yet another workaround](https://youtu.be/xQBLv3cPUbo). The solution in this PR is the simplest path forward, in my opinion, because it allows the users to use lower bridge flows and attain superior bridge smoothness through spacing manipulation. It also involves a single character code update, and a tool tip update that highlights more customizable slicer behavior. This work was tested and enhanced through dialogue with @ianalexis.

MrUnknownDE closed this issue

2026-04-05 19:13:42 +02:00

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Reference: github/OrcaSlicer#1697