← Knowledge base · seed/02-lidar-maintenance.md

Lidar maintenance procedure

When to clean the lidar window

The QL-200 safety lidar reports a dirt level from 0 to 1. Clean the window when dirt_level exceeds 0.50 or when scan timeouts (E-SEN-410) appear. Warehouses with cardboard dust need weekly cleaning; otherwise monthly.

Cleaning steps

1. Put the robot in maintenance mode from the fleet manager so it is not dispatched.
2. Power off the drive (safety lidar stays powered).

3. Wipe the window with a dry microfibre cloth, then isopropyl alcohol. Never use abrasive cleaners: scratches permanently degrade range.

4. Check the M12 Ethernet connector is fully seated and the locking ring is tight.

5. Run the lidar self-test from the service menu and confirm dirt_level is below 0.20.
6. Re-localize the robot at a docking marker before returning it to service.

Escalation

If timeouts continue after cleaning and the connector check, replace the lidar unit and send the old one for analysis. Record the serial number in the incident report.