MARLIN 2.x CALIBRATION ENGINE · v1.0.0

Calibrate Marlin Bed Leveling & First-Layer Adhesion

Master Unified Bed Leveling (UBL), Bilinear ABL, and Manual Mesh MBL. Prevent the fatal post-homing leveling disable bug (M420 S1), dial in negative BLTouch Z-probe offsets, and eliminate first-layer peeling.

npx skills add wwewtech/marlin-bed-leveling

⚡ 5x5 Bed Topography Visualizer & Feeler Simulator

Inspect simulated aluminum plate thermal warpage and dial in the BLTouch Z-probe offset feeler drag.

235x235mm BUILD PLATE · 5x5 INTERPOLATED MATRIX

–0.25mm (Low Dip) 0.00mm (Nominal) +0.25mm (High Peak)

Peak-to-Valley Variance0.14 mm

Recommended CompensationUBL 5x5 + M420 Z10.0

Z-Probe Offset (M851 Z...) -1.85 mm

PERFECT SQUISH (SLIGHT PAPER FRICTION)

Offset PolarityNegative (Safe Downward Trigger)

First Layer Height0.20 mm

📜 Production Slicer Start G-Code Generator

Generate bulletproof start macros for Cura, PrusaSlicer, or OrcaSlicer that guarantee leveling restoration after G28 homing.

Leveling Architecture

Bed Temperature (°C)

Fade Height (mm)

Post-G28 CommandM420 S1 Z10.0

Generated Slicer Start G-Code

🚨 Banned Marlin Leveling Anti-Patterns

Anti-Pattern	Manifestation	Mandatory Production Counter-Rule
The Forgotten M420 S1	G28 homing leaves leveling disabled	Always issue `M420 S1` strictly after `G28`.
Positive Z-Probe Offset	M851 Z+1.5 crashes nozzle into bed	Enforce negative Z-offset for downward probes (`M851 Z-...`).
Cold Bed Probing	Probing at 20°C bakes thermal warpage	Soak heated bed for ≥ 5 minutes before probing.
Unsaved Mesh Discard	Probing without EEPROM flash commit	Save mesh with `G29 S1` and commit with `M500`.