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Process › Others› Advancedinterlocking_beam

Beam interlocking

Along the border between two filaments, generate small beams that cross like the fingers of two hands, so the materials don't come apart. Very useful with PLA and TPU, or with support filament.

How it works

Two different materials that only touch along one face separate easily. With this option, the slicer puts small beams of one material inside the other along the border, like a jigsaw puzzle, and the bond becomes mechanical, not just sticking.

The settings that follow (width, direction, layers, depth and distance from the outside) define the shape and size of those teeth.

When to change it

  • A wheel with a TPU tire on a PLA hub that comes apart: turn it on.
  • Other two-material parts that separate (PETG + PLA): turn it on.
  • A keychain in the same PLA in two colors: usually not needed.

Typical values

ValueWhat for
OffDefaultdefault
OnDifferent materials

Watch out for

  • The teeth show if they reach the surface; “Interlocking boundary avoidance” hides them.
  • Adds filament changes in the joint area.

Goes well with

Interlocking beam widthInterlocking directionInterlocking beam layersInterlocking depthInterlocking boundary avoidance
What Bambu Studio saysits help card, quoted

What Bambu Studio says

Generate interlocking beam structure at the locations where different filaments touch. This improves the adhesion between filaments, especially models printed in different materials.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

Bambu Lab wiki (index)
In your profile0.20mm Standard @BBL A1 · No

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it toNo

In other slicers

Orca Slicer
Use beam interlockingMultimaterial › Advanced
PrusaSlicer
Use beam interlockingMultiple Extruders › Advanced
Cura
Generate Interlocking StructureDual Extrusion

Names taken from each program's code (Orca Slicer 2.4.2, PrusaSlicer 2.9.6, Cura 5.13.0). Credits