Z-Axis Binding and Sticking

Document the failure and confirm that it matches this guide: Z movement squeaks, stalls, changes pitch, or shows repeating layer artifacts.

Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.

Check misaligned lead screw. Move Z through full travel.

Check dry or contaminated screw. Clean and lubricate as specified.

Inspect over-tightened guide wheels or rails. Check alignment and fasteners.

Rule out bent lead screw. Inspect for repeatable tight spots.

Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.

Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.