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Process › Quality› Seamscarf_angle_threshold

Smart scarf angle threshold

The angle above which a corner no longer works as a hiding spot and the loop gets a scarf. Higher means less scarf; lower means more.

How it works

Each wall loop has corners with different angles: 90° on a box, 120° on a hexagon, close to 180° on a cylinder (practically no corner). The slicer looks at the angle at the point where the seam goes: if it's wider than this threshold, the loop has no sharp corners and gets a scarf; if not, a normal seam goes in the corner.

At 155°, a box keeps a normal seam and a cylinder gets a scarf. If you lower it a lot, toward 90°, even boxes get a scarf.

When to change it

  • A box with rounded edges, where the seam still shows because the corner is soft: lower it to 120 or 135°.
  • A cup or a cylinder, where you only want a scarf on the round parts: leave it at 155°.

Typical values

ValueWhat for
90°Scarf even on square corners
155°Defaultdefault
175°Scarf only on near-perfect curves

Watch out for

  • It only works if “Smart scarf seam application” is turned on.

Goes well with

What Bambu Studio saysits help card, quoted

What Bambu Studio says

This option sets the threshold angle for applying a conditional scarf joint seam. If the seam angle within the perimeter loop exceeds this value (indicating the absence of sharp corners), a scarf joint seam will be used. The default value is 155°.

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source

In your profile0.20mm Standard @BBL A1 · 155°

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it to155°

In other slicers

Orca Slicer
Conditional angle thresholdQuality › Seam
PrusaSlicer
No clear equivalent.
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