Thanks for pointing in the right direction, @JonRaymond ! Our X1C wasn’t detecting any Bambu filament for months until I finally decided to dig into this. I found that the setting ‘Update on startup’ was disabled. After enabling and restarting the printer, it did a clean check of all filaments and detected all Bambu RFIDs perfectly. It was merely a minor nuisance but it’s nice to have it working again 
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I agree with you, so far the detection was working except for the last slot, I used a none Bambu filament and it was always setting it to PVA but it was a PC, I was expecting not recognised filament. To be able to enter the specs manually wich menu I did not get. If I put the PC wheel on 3rd position, I had a not recognised filament so When I pressed on the feed button I got the Menu to enter the specs of the filament. When I was using Bambu filaments, When I feed the filament the machine did not turn the spool enough so that the RFID of the spool did nor reach the sensor and therefore could not detect the filament type and color. The problem is sofware but it somehow intemitent. Because I did not have any software update and on the same day it stopped working. It couls be by entering manual date in the AMS system could affect the normal operation of the AMS. Now I am looking for a way to reset the ems setup to its factory setting.
Now I have another problem, the printer think that there is an external spool, I have none installed. There is nothing cludge. It is like if the program has gone crazy. Now I am sure that the problem is comming from the firmware.
Im also having this issue the last few weeks . Ive had my x1c and ams since its release in canada and never had this issue before . Power off my printer and it recognizes the filament . Pretty annoying that i now have to power cycle my printer for it to recogniz bambu filament . Only reason why im paying 14$ more a kg is for the reusable spools and RFID . Anyone find a permanent solution?
I’ve had these issues on and off as well. The spool recognition seems random and spotty at best. I believe a powercycle would cure it and it seems to recognize spools when I unplug it to dig out broken filaments. (Another fun task given how it’s assembled. I’m assuming future models will have a more convenient way to do apparently regular “maintenance”.)
Thanks for your response to this post mdavis1863. I keep correcting my unidentified filament (P1S) it in the prepare tab of Bambu Studio…for every job. I never thought to go to the device tab and manually set my filament. I have two AMS units and only one slot will not recognize any spool. I tried swapping around and it seems that one cannot sense the tags. It just seems simpler to just type it in and move on until I have time to dive into it endlessly.
We just starting having this issue with our 2nd AMS. It will read the far right spool only. The other three are no-go’s with Bambu filament on a Bambu spool. When I attempt to reload each slot, it will flash up with the correct filament information, then revert back to a question mark. I’ve power cycled our X1 Carbon several times, I’ve even power cycled the AMS several times independently, and still have three unrecognized slots in the AMS.
This is what worked for me. Unload all filament the. Power cycle.
Manually load a spool in the first slot selecting all the settings.
Then manually setup a spool in the external spool holder.
Then load the filament using the on screen buttons for the external spool. Mine thought there was an external spool already so I had to disconnect the tube from the ams hub and put the external filament through. I extruded a little to make sure it was using the external spool.
Then using the onscreen buttons unload the external spool. Once it asks you to pull out the external filament and successfully finish that process put back the ams hub tube. I then used the buttons to manually load the first slot we configured on the ams. I then did the unload process for that filament on screen. Then I added a spool is slot 2 and it successfully read it. I was pulling my invisible hair out. Finally it’s working
I just had this same issue. I swapped a spool and it wasn’t reading. I tried trading two spools and then both were stopped.
I tried power cycling both the PS1 and PC software multiple times.
Solution: while the P1S system is power unplug the AMS cable, wait 30sec, and plug it back in. It will basically reset the AMS and it’ll run through all the filament spools and read the RFID chips.
I’m having same issue. Not recognizing filament in AMS after “downloading orca slicer”. Everything was working fine until then.
It’s the same for me. After I downloaded the Orca Slicer yesterday, my black PETG HF is no longer recognized.