First Layer
First Layer Diagnosis Guide
Diagnose first-layer issues by reading line shape, gaps, smearing, elephant foot, lifted corners, plate cleanliness, Z offset, bed mesh, and adhesion.
Read the line shape
Round separated lines usually mean the nozzle is too high. Transparent smeared lines often mean it is too low.
Good first-layer lines should touch cleanly without scraping, dragging, or leaving gaps.
Quick diagnosis path
Symptoms this guide helps with
- bad first layer
- poor adhesion
- elephant foot
- gaps
- scraping
Likely causes
- Z offset wrong
- Dirty build plate
- Uneven bed mesh
- Wrong first-layer temperature/speed
Fast checks before changing settings
- Clean build plate
- Inspect line shape
- Run first-layer square
- Adjust Z slowly
Safest first fix path
Clean plate
Check Z offset
Confirm mesh/level
Use Settings Finder
Save known-good baseline
Clean before tuning
Skin oils and dust cause adhesion failures that look like slicer problems. Clean the plate before changing a profile.
After major Z or mechanical changes, use a small first-layer pattern.
Corners and warping
If the center sticks but corners lift, the issue may be cooling, drafts, material shrinkage, or not enough brim.
Large flat prints need more conservative adhesion planning than small calibration squares.
Quick checklist
- Plate cleaned
- Z offset inspected
- Line shape read
- Bed mesh checked
- Drafts controlled
- Brim considered
Use this checklist before changing multiple settings. Controlled troubleshooting beats random profile edits.