I recently acquired a new A1 - combo system, and I am impressed with this printer and it’s features but I am equally disappointed with it’s performance repeatability. I was able to print the Benchy model that came included on the micro SD card and it printed just fine but I have had n0thing but problems since then. trying to get it to actually print .I have pretty much given up on the AMS-Lite as it keeps getting filament breaking off in the PTFE TUBES, so I have been trying to use the external filament holder with the AMS-Lite 4-in-one print hub. The printer goes through the motions like it is printing by moving the tool head over the bed in a pattern that the print should take but won’t extrude anything. The lack of documentation that is accompanying the printer doesn’t help. I’m sorry about the rant but I expect consistent operation from this printer, and so far my experience with it leaves me disappointed. After a week of searching, I found some troubleshooting documentation on the Bambu site, and tried the tangle sensor troublesoopting. but cracked the extruder hub trying to get the PTFE tubes off so I had to buy a new hub.
So I am left with an A1 combo paperweight that won’t extrude filament. I submitted a ticket but I’m not convinced that it will be answered any time soon, so I humbly came to this forum hoping that someone can help me solve this problem. Any helpful suggestions are appreciated. Thanks in advance for the guidance…
For documentation, I refer you to Bambu Lab’s WiKi.
For releasing the PTFE tube you have to press down the black coupler while pulling the tube at the same time.
What kind of filament are you using? Are you controlling the humidity?
This right here 
is what I would guess. Filament with a lot of moisture in it can become extremely brittle and cause problems in any printer. I also have noticed that some filament brands/formulas do this worse than others.
Also from the description you are giving it appears that the filament isnt actually reaching the extrusion gears . i usually cut the first 10mm or so to make sure there is no stiffness in any kink ,
Thank you for the helpful tips!
Agreed, that is how I do it also… thanks
PLA - not humidity controlled and not new filament either
If the filament isn’t reaching the extruder, wouldn’t the spool out sensor catch that and display a warning?
Is the Bambu filament the best to use with this printer I should have bought new filament with my printer I guess.
Do most of you but the Bambu rolls or the refills? Dao the refills come with the spool or does that need to be ordered seperate?
Not if it has reached the printhead (toolhead) i found that with the single (especially) use spool it required a little manual effort to add but more so to remove filament, without the use of the ams to rewind the spool those couple of extra cm`s , either into the gears or out of the sensors reach in the toolhead .
One late p.s. remember to press load in the filament setting on the printer as to make sure the filament is getting snagged by the gears, that will then give an error / retry message when it tries to purge the filament .( it will ask you to check the purge material )
just got this error on my p1s last night after printing some tpu and then trying to load some petg from my ams.
dont see any stuck filament, tapped on the sensor but i hear a funny noise when i try to load filament. my guess probably a piece stuck in extruder???
would ove an answer too to this question.
i’m guessing gotta take extruder apart? ?
I dont use a P1s yet and i would not recommend stripping the extruder before speaking to customer support (warranty)
id also ask in the threads dedicated to p1s and its wiki
Just to update on this. Support got back to me (took a dang long time to get started) and were really helpful. They had me check a couple things (connections for filament sensor etc) and then sent me a new AMS Hub, new Filament Sensor, and new Filament Sensor Hub. The AMS hub arrived before the others so I changed that out, no joy. The next day the sensor and sensor hub arrived. I replaced both, ran a print with 51 color changes without an issue and, knock on wood, haven’t had an issue since.
I dug into the old parts just to see what I could see. The only thing I noticed was, on the filament sensor hub, there was some super sticky grease. When I would slowly pull a piece of filament out, the little metal “bar” that detects the filament would stick in the “open” position (the position it’s in when filament is present.) I cleaned the the with some 91% ISP to remove all the sticky grease and now that little bar moves freely. I noticed that the replacement they sent me didn’t have the amount of grease that was on the original. I’ll keep the one I replaced as a backup, but for now, everything is running the way it should!
Thats good news. that you were able to fix it. My setup is frustrating me. Was the sensor that you mentioned in the AMS-Lite ? I had to replace one AMS-Lite feeder because I broke the black retaining ring trying to remove a PTFE tube and they only sell a n assembly to replace it. I also had to order a new extruder hub because the original one broke. Is this the paqrt that you replaced?
. Where was the grease?
Thanks
I don’t use the P1 series. I am having issues with an A1
This sounds out of the scope of my pst. I am seeking help with an A1 combo; not an AMS
@Jalan No one said you did.
What doe this have to do with the ORIGINAL POST ?
Perhaps you should try reading the post and my reply ? instead of trying to look clever ,