I own a P1S with AMS since Christmas - and so far I’m really happy with it. But, since a few weeks I have a reall strange problem with my AMS. Printed from slot 1, 3 and 4 everything works fine. But from slot 2 my prints have extreme flow rate (?) errors.
All connections look good, all " gears" in the AMS are clean and move freely. Ive already disconnected the AMS and checked everything which is easily accessable. Same filament is with same profiles is used in both prints (Extrdr PLA NX2, but same problem with Bambu PLA). The printer/software itself does not output any error messages.
It looks like extreme under-extrusion. If it only happens on one of four slots/spools, it sounds like resistance to feeding or not being pushed sufficiently.
Is the PTFE tube worn, and therefore snagging the filament?
If a piece of filament is pushed through each tube by hand, does 2 feel more resistance than the others?
If the PTFE tubes are disconnected, and then the spool Loaded, do they all feed at the same rate and with the same resistance using the same test spool?
There are instructions in the Wiki (Bambu Lab Wiki Homepage | Bambu Lab Wiki) for how to disassemble the AMS - it’s not difficult. Just take care not to strip or lose the tiny screws, or pull the wires too hard and damage them or the plugs.
Hi, I have the same problem, only with slot 1. Have had the AMS and internal hub apart and it appears to be clean.
Did you sort your problem out and if so how?
I have removed all the parts from the AMS once and reinstalled them, but I still have the same problem in Slot 2.
Due to lack of time (having just become a father) I have not yet been able to do any further troubleshooting. Is this a warranty case for bambulabs? Anyone has a fix for it?
This came up recently in another thread - the problem is the roller assembly in slot 2 for whatever reason wasn’t seated properly at the factory or came loose during shipping.
That roller if gently pushed down on will snap into place and all should be good. It’s biting a lot of people.
To get to the bits in the bottom of the AMS, there’s two hex head screws in the bottom that you can get to once you remove any filament spools. You also need to unplug the teflon tube and power/data with power off.
Once you undo the hex screws, the mechanism lifts out but you need to help a bit around where the teflon tube attaches to the AMS mechanism - AND be careful of two cables that plug into a board mounted to the inside of the AMS outer shell. You have to lift up the AMS mechanism a little to be able to disconnect those cables. Once free it just lifts out.
Bambu has videos of how to do it. Highly recommended.
Well… just printed from Slot 4 and have the same (not as bad but significant underextraction) problem. Moved the filament to Slot 1 and could print perfectly fine.
