Overlap two different infill patterns at the boundary?

Bambu Lab Software Bambu Studio
1

I’m using Bambu Studio with different infill patterns assigned to different modifier regions within the same part.

In the example shown in the image:

  • The main body uses 3D Honeycomb.
  • The circular modifier uses Tri-Hexagon.
  • The rectangular modifier uses Adaptive Cubic.

The problem is that when two modifier regions meet, the infill lines are simply clipped at the boundary. The two patterns remain next to each other but do not actually overlap or interlock.

I’m looking for a way to make the infill lines from the two regions overlap slightly, for example by 0.5–1 mm, so that the two patterns mechanically interlock and create a stronger connection.

Is there any setting in Bambu Studio that controls the overlap between two different sparse infill regions/modifiers?

I am aware of the Infill/Wall Overlap setting, but that appears to control the connection between infill and walls, not between two different infill regions.

Would increasing the size of one modifier region make the two infill patterns actually overlap, or does Bambu Studio always clip each infill pattern to its respective region?

If this is not currently possible, is there a workaround to create a small transition/overlap zone between two different infill patterns?

I’m mainly interested in this because I want to improve the mechanical connection between different infill structures without simply increasing the overall infill density.

infillpreviewandprepare
infillpreviewandprepare479×300 47.4 KB

2

I’ve wanted the same thing, but not that I’ve found, no. They are joined a bit by the “anchor” overlap (the bits that help adhere the infill to the walls), but that’s not really what we’re thinking. Some infills work better together than others, and the infill tuning settings can help get more of a join. A “transition zone” like you show in the shot can also work nice. We can also force walls between the different zones, but that’s usually undesirable anyway (and sometimes a similar effect can be achieved by adjusting the infill anchor).

But no true “interlock.” But TBH I’m not sure it would make much of a difference in the end… as long as the plastic is fusing properly where it should, tends to just work anyway.

-Max

3

Make another zone and set it to whichever infill you want and 100% infill to act as a transition.

If the shape is irregular, it may be better to actually design all of your infill zones as separate bodies for easier control.