Structural / Functional Issue

How to Fix Interlayer Cracking (ABS/ASA/PC/PA)

Step-by-step fix for interlayer cracking (abs/asa/pc/pa) on Bambu Lab printers including X1C, H2D, P1S, and A1.

How do I fix interlayer cracking (abs/asa/pc/pa)?

1
Increase nozzle temperature by 10–15°C and reduce print speed. For ABS/ASA/PC/PA, insufficient temperature causes weak inter-layer fusion.
Setting: others.nozzle.nozzleTemp
2
Reduce part cooling fan to 0–30% and keep the enclosure fully closed. ABS/ASA/PC/PA crack when layers cool too quickly.
Setting: Cooling fan
3
Increase wall loops to 3–4 and raise infill density. More material per layer increases bonding surface area.
Setting: strength.walls.wallLoops

Pro tip: Select "High Strength" above — it increases walls and infill density while recommending Gyroid infill for maximum inter-layer bonding.

Related Print Issues

Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching

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