Structural / Functional Issue

How to Fix Part Too Flexible / Not Stiff Enough

Step-by-step fix for part too flexible / not stiff enough on Bambu Lab printers including X1C, H2D, P1S, and A1.

How do I fix part too flexible / not stiff enough?

1
Increase wall count to 4–5 and infill to 25–40%. For stiffness, walls matter most — they form the structural shell that resists bending loads.
Setting: strength.walls.wallLoops
2
Switch to Rectilinear infill. Its long straight strands act like I-beam flanges and provide the highest bending stiffness per gram of material.
Setting: strength.infill.pattern
3
Consider switching to a CF-reinforced filament (PLA-CF, PETG-CF, PA6-CF). Carbon fiber dramatically increases stiffness — up to 3–4x vs. base material.

Pro tip: Select "High Stiffness" above — it sets Rectilinear infill, 4+ walls, and recommends CF filaments for maximum rigidity.

Related Print Issues

Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Bed Adhesion Failure / Part Detaching Support Removal Damage / Scars

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