Cosmetic Issue

How to Fix Uneven First Layer

Step-by-step fix for uneven first layer on Bambu Lab printers including X1C, H2D, P1S, and A1.

Related Bambu Studio Error Codes

0300-800203008002

How do I fix uneven first layer?

1
Re-run automatic bed leveling (mesh calibration). Clean the build plate with IPA. A dirty or un-leveled bed is the #1 cause.
Setting: Bed leveling
2
Adjust Z-offset in 0.01mm increments. If the first layer looks transparent or doesn't stick, lower the nozzle; if it's squished with ridges, raise it.
Setting: Z-offset
3
Increase first-layer bed temperature by 5°C and slow first-layer speed to 20–30 mm/s for better flow and adhesion.
Setting: others.bed.firstLayerBedTemp

Pro tip: Select "Good Cosmetics" in your priorities above to see settings that optimize surface finish, including first-layer tuning.

Related Print Issues

Stringing / Oozing Visible Layer Lines Elephant Foot (First Layer Bulge)Warping / Curling / Lifting Visible Z-Seam

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Stringing / Oozing Visible Layer Lines Elephant Foot (First Layer Bulge)Warping / Curling / Lifting Visible Z-Seam Rough / Droopy Overhangs Blobs / Zits on Surface Ghosting / Ringing Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching Support Removal Damage / Scars Infill Showing Through Walls Heat Creep / Clogging Mid-Print Thin Walls Breaking / Gaps in Thin Features Part Deforms in Heat / Sun Spaghetti / Print Detached Mid-Print Under-Extrusion (Sparse Lines / Missing Material)Over-Extrusion (Blobby / Too Much Material)Nozzle Clog (Blocked / No Extrusion)Extruder Clog (Filament Stuck in Gears)Filament Sticking to Nozzle (PETG)Bad Bridging Quality (Sag or Snap)Belt Pattern / VFA (Vertical Fine Artifacts)Gaps / Holes in Top Layer Different Gloss / Sheen on Different Areas Interlayer Cracking (ABS/ASA/PC/PA)Model Collapsing / Nozzle Hitting Print Wet / Damp Filament (Popping, Bubbles)Layer Shifting (Layers Offset Mid-Print)AMS Filament Tangled / Spool Stuck AMS Filament Ran Out Mid-Print AMS Cutter Stuck / Failed to Cut Filament Pile-Up in Waste Chute Build Plate Not Detected / Marker Missing Power Loss / Print Resume After Outage Hotend Fan Speed Abnormal / Stopped Homing Failed (X/Y/Z Axis)AMS Filament Change Failed / Purge Timeout Chamber Temperature Too High (PLA/PETG Softening)Print Paused — Door / Cover Open Printing CF Material with Wrong Nozzle CR Touch / BLTouch Leveling Failure Sprite Extruder Clicking / Grinding Filament X/Y Belt Tension Issues (Loose or Over-tight)Klipper Input Shaper / Pressure Advance Tuning Thermal Runaway Protection Triggered Bed Leveling Springs Losing Tension Creality Print / Slicer Compatibility Issues PTFE / Bowden Tube Wear or Gap IDEX Dual Extruder Calibration Offset Luban Connection / WiFi Transfer Issues Module Switching Problems (3D Print / CNC / Laser)Heated Bed Temperature Uniformity (Large Bed)