¶ Phenomenon Description
The filament break detection module of the extruder still shows a blue light when there is no filament.
¶ Cause Analysis
- Residual filament triggering
- Deformation of PTFE tube
- Detachment/breakage of the fixed spring on the filament break detection trigger plate
- Incorrect assembly of the trigger plate
- Quality issue with the filament break detection module
- Problem with the filament break detection cable
- Quality issue with the hotend circuit board
¶ Troubleshooting and Solutions
1. Check the working status of the filament break detector. Without inserting filament and removing the PTFE tube (to avoid false triggering due to tube deformation), check if the detector's light is blue. Normally, blue light should be on when filament is detected, and off when no filament is present.
¶ Further investigation:
A. Check if there is any residual filament or debris in the feeding tube, clean it and try again.
B. Check if the port clasp of the filament break detector is intact. If it's broken or has poor contact, it may cause false triggering.
2. Disassemble the front cover of the extruder, check if the spring on the trigger plate is detached or broken. If not, check the direction of the trigger metal dome blade (left for K2 Plus, right for Creality Hi).
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3. Check if the filament break detection cable is damaged or has poor contact. You can also directly swap it with the cutter module cable (compatible with the filament break detection cable) to rule out cable issues. If confirmed as a cable problem, replace the filament break detection cable (sku: 3103090095).
4. Replace with the spare filament break detection module that came with the machine. If not available, send a replacement filament break detection module (sku: 4001090035). For wiki page reference: Replace K2 Plus Filament Break Detection
If the issues persist after steps 3 and 4, replace the hotend circuit board (sku: 2101020285). For wiki page reference: Replace K2 Plus Hotend Circuit Board