FO0528 Empty Extrusion Detection prompt indicates that during printing, the extruder nozzle is not extruding material as expected. The CFS system calculates the actual filament feed amount through the odometer wheel inside the hub outlet. If the expected filament feed increases in the Gcode instructions during printing, but the count of the hub outlet odometer wheel remains unchanged, the system will determine it as "empty extrusion".
Clogged nozzle: The nozzle or extruder is blocked, preventing normal filament extrusion.
Filament slippage: The extruder motor gear or hub outlet transmission gear slips, failing to push the filament to the nozzle.
Hub outlet motor failure: The hub outlet motor cannot operate normally, causing the filament to fail to feed into the extruder smoothly.
Filament jam: The filament gets stuck in the PTFE tube while being fed into the extruder, resulting in feeding failure.
Check for extruder clogging: Follow the corresponding printer's nozzle cleaning procedure to check if there's any blockage in the extruder or nozzle. If clogged, clean it to ensure smooth filament extrusion.
Check the filament spool: Confirm if the spool is stuck or not rotating smoothly.
Check for filament slippage: Inspect the extruder motor and hub outlet motor gears for slippage or wear. Ensure sufficient friction between the gears and filament, replace or adjust gears if necessary.
Check if the hub outlet motor is working properly: Confirm that the hub outlet motor can operate normally, ensuring smooth filament feeding from the CFS to the extruder. If the motor doesn't turn, check the motor wiring and power supply.
Check the PTFE tube: Inspect the PTFE tube for bends, blockages, or reduced inner diameter that may cause filament jams. Clean or replace the PTFE tube to ensure smooth feeding.
Continue printing or restart the print: After troubleshooting, clicking continue may result in layer gaps or other defects. If the defects don't affect the final product quality, you can continue printing; otherwise, stop and restart the print job.
Check the extruder and nozzle: Investigate for clogging and promptly clean any filament blockages in the nozzle and extruder.
Check the filament spool: Confirm if the spool is stuck or not rotating smoothly.
Check the PTFE tube: Ensure the PTFE tube is not bent or clogged, guaranteeing smooth filament feeding.
Check the hub outlet motor and extrusion mechanism: Confirm that the CFS hub outlet motor is working normally, and the gears inside the hub outlet are not slipping or stuck.
Choose to continue printing or restart: Based on the condition of the print, decide whether to continue printing (accepting imperfections) or restart the print job.