¶ FR2836：Feed issue , filament may be blocked between the CFS hub and extruder filament detector.
¶ Applicable Model: K2 Plus
¶ Why does this prompt appear?
During the feeding process, the filament fails to reach the material break detector of the extruder after passing through the hub outlet. Common reasons include:
High resistance in the PTFE tube: The PTFE tube above the machine's drag chain or above the extruder's material break detector is bent or has increased friction, hindering filament movement.
Material break detector not working properly: The extruder's material break detection module cannot be triggered.
Hub outlet motor or other hardware failure: The hub outlet motor cannot operate normally or has mechanical issues, preventing the filament from advancing smoothly.
¶ How to solve?
Filament spool tangling: Check if the filament in the spool is knotted or tangled, and if the CFS shaft has too much rotational resistance, causing the filament to be immobile during feeding.
Filament condition: Check if the filament in the spool is deformed. If using a cardboard spool, check if it's damaged or deformed, affecting normal filament delivery.
PTFE tube condition from hub outlet to extruder material break detector: Check if the PTFE tube is bent, damaged, or has a reduced inner diameter (normal inner diameter should be 2.5mm) to rule out excessive resistance issues.
Hub outlet motor grinding filament: Check if the filament has moisture absorption issues, is expired, or has uneven diameter, ensuring it doesn't break in front of the hub outlet motor.
Hub outlet motor operating status: Confirm if the hub outlet motor can work normally. If the motor gear slips or doesn't rotate, check the motor wiring and mainboard connection to rule out poor contact or unstable connection.
Extruder material break detector malfunction: Check if the extruder material break detection module is working properly, observe if it can trigger the LED light. If the detector cannot be triggered, check the connection of the material break detection cable and terminals.
¶ General troubleshooting steps
Check the filament path: Examine the entire path from the spool, PTFE tube to the hub outlet motor for any tangling, resistance, or filament damage issues.
Test hardware operation: Check if the hub outlet motor and extruder material break detection module are working normally. If faults are found, try to repair or replace.
Replace damaged filament: If the filament is too brittle or has uneven diameter, it's recommended to replace it with quality-assured filament to ensure smooth printing.