When i trying to push a new filament the ams push the filament too fast and the buffer cannot to pushe
the filament and do it too fast A video is attached
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You may need to provide a more detailed description of the problem or paste a link for the video to get some support.
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When the ams pushing new filament it pushed the filament faster than usually and when the filament becames insid the extruder (befor the EXTRUDER start push) the buffer gos back and forth few times quickly white no success and trying to pull back the filament and push again when pulling bak the filament pulling back faster than the spool and the getting into troubleand gating out from the spool
it is backing on self few times then stop.
I dont reserved any error massage
There are many possible causes; please answer the following questions:
- Is the issue new (i.e. it used to work)? Or is it a new printer (or AMS)?
- Is there repeatability? For example, does the issue occur with different spools or AMS ports?
- When does the issue occur? I mention this because you stated there was no error message. So, I assume you are not printing; otherwise, alerts will occur regarding being unable to feed the filament.
- Is the problem solved if you manually feed the filament?
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The printer wase perches as new befor a year whithe the ams.
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It occurs white different spools and different ams slots.
3.It always occurs when I try to load material/print.
I cant to print nothing.
- When i disconnected the ams and i load manually from the rear spool it works.
Thank you.
So, if understood, any spool in any place on the AMS fails by entering a loading-unloading loop. A possible cause is unwanted resistance with the filament path from the AMS to the extruder.
Since the filament arrives at the extruder (confirm???), using your hand, try to adjust and hold the PTFE tube at the extruder inlet to get a smooth path with minor resistance to the filament movement. Also, take the time to watch the filament feeding, especially where it stops or slows down. Test a few times before moving forward.
If the issue isn’t in the extruder, you can check other critical zones, which are:
- the feeder and internal hub within the AMS;
- the buffer and the inlet to the printer.
- PTFE tube
I suggest starting with the buffer and inlet port to the printer and the PTFE tube, as they do not involve disassembly. Let me know if you have doubts or cannot identify the cause. Meanwhile, consider the following procedures and info, especially if there is a need to disassembly the AMS:
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I ran into more and more feeding problems lately but did not think much of it as I have a workaround.
We face two problems…
1: A new roll of filament, quite often is NOT perfect during those first 20 to 30cm on the roll.
Plus: We like to do things quick, which might mean we won’t produce a proper cut when we trim off our filament.
Take lazy me, using a crappy side cutter most of the time…
I now keep a little blowtorch near the printer…
Heat a small spot of the filament with it, pull, then cut where the filament start to shrink in size.
I broke my network cable tool 
These cheap tools to remove the outer insulation are great for filament cutting!
Put on, spin around two or three times and just snap the filament for a clean and straight break.
2: Bambu went dirt cheap on those air-hose-push connectors…
These standard connectors are designed for PU AIR HOSES and designed to only connect them.
In our printers we use MUCH softer Teflon tubes…
Means those sharp teeth biting into it will go deeper and deeper over time.
Thanks to our filament transport constantly trying to push those tubes out, then relax, push out, …
After some time the Teflon tube no longer sits firm against the internal collar.
Worn our or badly cut filament then gets stuck in this spot.
It rubs down the tube, finds this tiny gap and than it hits the metal passage going through…
For me the small tube coming out of the AMS turned into a nightmare.
It was too short and the rubber sleeve from the AMS kept pushing the release ring in, then the tube popped and the print failed.
Once I was done with locking rings and such and replaced the tube with a longer I removed this push connector…
A short piece of rubber hose and two hose clamps are now in use and so far had not a single failure.
I marked the Teflon tubes right at the rubber tube so IF they ever let go I can see it…
The connectors used SHOULD have a tapered bump stop.
Let half of it stop the tube while the tapered part starts at a slightly larger diameter than the ID of the Teflon tube.
Just saying…
And if then instead of sharp knifes a twist lock system would be implemented we could all be happy campers…
Remember BBL recommends certain id and od. As well, PTFE tubing is considered a consumable. Once the id gets worn it will cause feeding problems. Not saying that’s whats happening here, but something to consider.