Guide

How to Get a Perfect First Layer on an FDM Printer

Almost every reliability problem on an FDM printer is a first-layer problem. Fix this once and most other issues disappear.

Step-by-Step

  1. Clean the build plate

    Wash the plate with warm water and dish soap; rinse and dry. Skin oil is the most common cause of intermittent adhesion failures.

  2. Level the bed at print temperature

    Heat the bed to the temperature you actually print at and re-level — the plate warps a measurable amount when hot.

  3. Run a Z-offset live tune

    Print a single-layer test square. While it prints, adjust Z-offset in 0.01 mm increments until extrusion looks slightly pressed — neither stringy nor squashed flat.

  4. Set first-layer speed and flow

    Slow the first layer to 20–30 mm/s and use 100% flow. Save speed for layer 2 onward.

  5. Lock in the profile

    Save the working Z-offset and first-layer settings per build plate. Re-check monthly and after any hardware change.