CFS probs - posns 1 & 4 work fine, 2/3 not loading

Flagship K Series Creality Flagship K2 Plus & CFS
1

I am having problems with the auto filament loading on my CFS
Filament roll positions 1 and 4 work fine.
Filament roll positions 2 and 3 will not auto load.

If I push the filament into 2 or 3 all the way through to the hub, eventually the red lights on positions 2 and 3 come one and give me an FR2385 “Feed issue error”.

I have opened up the entire filament path way and there is nothing stuck or in the way of these two filament paths.

As I push the filament into the loading position on roll positions 2 & 3, I can hear the sensor on the autoloaders click but neither sense the filament and start autoloading. Have searched various site and there’s a lot on the hub and extruder sensors getting blocked but nothing I can find about the autoloaders.

I have flagged this with Creality but in the meantime I was thinking of swapping the autoloader 1 with 2, and 3 with 4 to test if the fault is with the 2/3 autoloaders but just wanted to check if this would be a waste of time and if any of you know of this problem and can suggests a solution.
Thanks

2

Swapping the autoloaders would definitely help you isolate the problem.

I resolved a similar issue with mine just by disassembling the autoloader and thoroughly cleaning and reassembling. My issue occurred after trying to run PA-CF through the CFS (never again) the filament path was clear but the there was a lot of grind and dust in the auto loader.
Check out this youtube video below for a problem to look for in case you have stripped one of your gears.

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3

Thanks - that video almost certainly shows the problem I’m having. I will swap the loaders and verify this.

4

I’ve had to completely dismantle my CFS and remove “filament dust” from the gears in the underneath 4-1 motor/gear assembly…
Some filaments just get chewed up too much by the CFS to be reliability usable…
Stick to external/side spool for exotics

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5

I swapped CFS loader unit 2 (originally not working) with working loader 4
Now Loader #2 doesnt work and loader 4 does ???

6

I contacted Creality and they requested a video showing the problems and sequence of CFS indicator lights and errors. This proved tricky as my emailer can only handle about 10s of video and the time from when I attempt a fil load and error reporting is many minutes . I ended up recording snippets and putting them on YouTube and sending then the sequence of video links highlighting things. <24 hours later I get a email they’re sending me 4 loaders / motors. I’m not entirely convinced these will solve the problem but we’ll see.

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7

I’m having problems with the CFS over retracting and pulling the filament completely out.
I’ve cleaned the sensors underneath but it’s still doing it.

Suggestions? Is it a sensor somewhere else?
Is there a sensor in the feeder mentioned above?

8

There is a sensor just under the PTFE tube entry to the loader that can be seen without taking the ladder apart. It shows up as a blue LED which can be seen by pushing filament into the loder. If that doesnt come on it wont load. FWIW that is not my problems as I can clearly see the blue sensor light come on. My 4 new loaders arrived within a week of me reporting my problem (each in its own foam padded box) but I have not had time to fit them yet - maybe today.

9

Does anyone know if the video linked above in this thread, in any way invalidates the warranty…
I.e Im now sure I’ve developed loader issues, but is that a support ticket, or just follow the vid to self resolve

10

New loaders installed but problem remains with loaders 2 and 3 (1 and 4 working). I removed the plastic cover covering the loaders so can clearly see the blue LED filament sensor and motor and confirm for loaders 2/3 when filament inserted the Blue LEDs come on but motors do not turn.

I tested the wiring by plugging loader 3 sensor and motor cables at the junction board (in between loader 3 and 4) into loader 4 sockets and then loader 3 (plugged into loader 4 sockets) worked. Suggests motor power not switching at junction board or further back. Have logged all this with Creality.

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11

I’ve replaced the feeding and retracting component for#2 (bot off Amazon - figured it would be faster than waiting for Creality support) and it seemed to behave better at first.
I performed 1 successful print.

The next print - for some reason - decided to retract slot 2 (not used in the successful print nor selected for the next) and fully retracted it out the tube.

Now, it’s claiming a jam in the 4-way and won’t even load any filament.

Thoroughly frustrated with this. I bought this machine because I was tired of fiddling. I want to design and print!

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12

I’m still exchanging emails with Creality over this unresolved issue (filament loaders 1/4 working, 2/3 not loading) . This morning they are sending me a bunch of parts ( including a new CFS motherboard) to try.