Bulging Corners, Messy Seams, and Gaps After Corners

These are the classic signs of an incorrect pressure advance value. Because Pro PCTG is so viscous, it's much more sensitive to this setting than PLA or PETG.

1. Calibrate pressure advance for your printer, nozzle, and color. See Pressure advance.
2. Confirm pressure advance is enabled in the filament profile.
3. Slow outer walls to 100 mm/s or less.
4. Recalibrate after any nozzle change.

If corners are thin or rounded after calibrating, the value may be too high. If corners bulge, it may be too low.

Related articles

• Calibrating in Bambu Studio
• Calibrating in other slicers