Bambu Lab HMS error code 0300-0F00-0001-0001 falls within the 0300-0F00 optical sensor subgroup, which covers the lidar-based first-layer inspection and calibration system used on equipped Bambu Lab models. This error indicates the lidar sensor failed to complete its calibration routine or returned readings outside the valid range.

What the Error Means

The lidar sensor on Bambu Lab printers scans the first printed layer to detect spaghetti failures, inspect layer adhesion, and assist with dynamic calibration. Suffix 0001-0001 in the 0300-0F00 group indicates a calibration anomaly — the sensor’s baseline scan of the empty bed could not be completed to a sufficient confidence level. This can result from ambient lighting conditions that overwhelm the optical system, contamination on the lidar lens, a build plate with reflective or highly irregular surface properties, or physical damage to the sensor.

Step-by-Step Fix

1. Power off the printer and inspect the lidar sensor lens (located on the toolhead on equipped models). Look for fingerprints, dust, or filament debris on the optical window.
2. Clean the lens gently with a dry microfiber cloth or lens cleaning tissue. Do not use solvents.
3. Ensure the printer is not in direct sunlight or bright artificial light during calibration. Lidar sensors can be saturated by intense ambient IR sources.
4. Remove the build plate and check for highly reflective coatings or unusual surface textures that might give anomalous lidar returns. A standard Bambu Lab PEI or textured plate is expected.
5. Replace the build plate with a clean, standard plate and rerun the calibration from the settings menu.
6. Power cycle the printer fully and attempt calibration again on the next boot.
7. If calibration continues to fail across multiple attempts with a clean lens and standard plate, the sensor may need replacement.

Parts Required

• Microfiber lens cleaning cloth
• Replacement lidar sensor assembly if physical damage is confirmed

Contact Bambu Lab support if the error persists after environmental and cleaning steps — a firmware update may also address known lidar calibration issues.