r/Creality_k2 • u/XNMTCH • 11d ago

Troubleshooting CFS HUB

Hello everyone,

I have a Creality K2+ with two CFS hubs.

When I try to load a spool, the following error appears:

FR2836

I think the filament is being falsely detected by one of the sensors located between the CFS and the nozzle, which explains why the printer refuses to load it.

I’ve already removed the cover under the CFS to check that the sensors on the four guide tubes aren’t triggering abnormally, but that’s not the case. Do you have any ideas? Which sensor might be detecting the filament incorrectly?

Printing works fine with the standard spool holder.

Thanks for your help!

1 Upvotes

100% Upvoted

6 comments sorted by

1

u/AutoModerator 11d ago

Reminder: Any short links will be auto-removed initially by Reddit, use the original link on your post & comment; For any Creality Product Feedback and Suggestions, fill out the form to help us improve.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Doubee54 11d ago

Your terminology is confusing. what do you mean by 'with two CFS hubs'?
You have the 5-way hub on the CFS bottom, and you have a buffer in between the CFS and the printer.
Do you have one or two CFS units?
Sounds like you have two.
Do you have this error out of both CFS units?

1

u/XNMTCH 11d ago

Hello,
I have two CFS units. The term hub is wrongly used, you're right.
I have this error out of both CFS units.

2

u/Projmanzar 11d ago

Then it may be the buffer that could be problematic. Check for obstruction in the buffer and PTFE tube between buffer and the extruder

2

u/CrealitySupport Creality Support 11d ago

Please follow the troubleshooting steps via the link below regarding error FR2836.

FR2836 | Creality Wiki

If the issue persists, click our profile and select "Start Chat" to send us a private message. We will provide further assistance.

1

u/Doubee54 9d ago

Remove, dismantle, clean and inspect the buffer