TC2841 Cutter Sensor Error (for K2)

Why does this prompt appear?

This message appears when the extruder attempts to cut the filament, but the Hall effect sensor does not detect proper cutter movement after the cut. This typically indicates that the cutter is stuck or has not returned to its original position.

Common causes:

• The cutter is jammed inside the extruder and cannot move freely

• The cutter is missing or has fallen out

How to Resolve the Issue

1. Cutter Stuck

Open the extruder front cover and inspect the cutter area for any obstructions or debris. The cutter may be caught or misaligned due to damage or interference from the extruder housing.

Action:

• Clear any foreign objects

• If the housing is deformed or damaged, replace the extruder front cover

• Refer to: Replace K2 Plus Extruder Front Cover

2. Cutter Missing

If the cutter is missing or visibly damaged, it will need to be replaced.

Action:

• Inspect for physical damage or missing magnets

• Refer to: Replace K2 Plus Cutter

General Troubleshooting Steps

Step 1:
Remove the extruder front cover. Manually push the cutter using a tool such as a screwdriver or hex wrench. Confirm that it moves and rebounds properly.

Step 2:
If movement is stiff or the rebound is not smooth, try slightly loosening the screws on the front cover. Then test the cutter movement again.

Step 3:
If the issue persists, fully remove the front cover and extract the cutter for inspection.

Step 4:
Check the cutter for visible deformation or wear. Ensure both side magnets are intact and properly secured. If any component is damaged or missing, replace the cutter.

Replacement Cutter: https://store.dremc.com.au/products/creality-k2-plus-replacement-cutter-module-assembly

Replacement Cutter Guide: https://support.dremc.com.au/en/support/solutions/articles/51000497922-how-to-replace-k2-extruder-front-cover-only

Step 6:

Check if the pusher module leg is present and not broken. 

Replacement Part: https://store.dremc.com.au/products/k2-plus-cutter-pusher

Replacement Guide: https://wiki.creality.com/en/k2-flagship-series/k2-plus/replace-cutter-push-rod

Step 5:
After reassembly, run the filament retraction or cutting process again to confirm the problem is resolved.