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Process › Quality› Seamseam_slope_conditional

Smart scarf seam

Lets the slicer decide where to use the scarf: only on smooth loops, which have no corners to hide the seam in.

How it works

A sharp corner hides a normal seam almost completely; there the scarf adds nothing and costs time. With this option, the slicer looks at each loop: if it has a fairly sharp corner it uses a normal seam, and if it's smooth or rounded it applies the scarf.

What counts as a “corner” is set by “Scarf application angle threshold” (155° by default). If you turn this off, the scarf is applied to every loop.

When to change it

  • A pencil holder with corners and a curved rim, or any part that mixes straight and round sections: leave it on; each loop gets the seam that suits it.
  • You want a scarf on absolutely every loop, including those of a box with corners: turn it off.

Typical values

ValueWhat for
YesDefault; only where there's no cornerdefault
NoScarf on every loop

Watch out for

  • It only has an effect if the scarf is turned on in the filament (or in the process, if you checked “Override filament scarf seam setting”).

Goes well with

What Bambu Studio saysits help card, quoted

What Bambu Studio says

Apply scarf joints only to smooth perimeters where traditional seams do not conceal the seams at sharp corners effectively.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

In your profile0.20mm Standard @BBL A1 · Yes

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

In other slicers

Orca Slicer
Conditional scarf jointQuality › Seam
PrusaSlicer
Scarf joint only on smooth perimetersLayers and perimeters › Advanced
Cura
No clear equivalent.

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