I just got my X1C and AMS last week, and initially used it without the AMS as I needed to get the longer 6pin connector and a longer PTFE tube for the AMS as I can’t fit the AMS directly on top of the printer, so it is on a counter above (though the distance isn’t massively increased). It has been working brilliantly without the AMS and I love the printer itself, which is a giant step up from my Prusa Mini+.
Tried connecting the AMS up at the weekend - all works in terms of loading the spools (2 Bambu PLA spools, a Fillamentum spool and a Sunlu spool, all PLA/PLA+). I tried a single colour print and the filament from the Sunlu spool would get all the way to the extruder, but fail to load. If I angled the PTFE tube up slightly, it loaded fine and printed. But the same issue occurred on retraction - I had to ever so gently pull the filament at the back of the printer and it would then unload. I’ve tried all the other spools today, and exactly the same thing is happening - filament gets all the way to the extruder, but most of the time will give an error saying it has failed to load (but will with a bit of holding up of the PTFE tube at the extruder). However, same failure to retract happens every time - and again, the gentlest pull on the filament at the back will then retract.
I initially tried printing this Printables as I thought the issue was the angle of the PTFE tube at the extruder but it didn’t really help. I also tried the longer version by the same creator but that didn’t help either. I then tried this one Printables and that has helped with loading a bit, but strangely only if I insert the top of the PTFE tube through the top (rather than the side then bending down as per the picture) - it seems to need a steep angle to load.
However, this hasn’t helped at all in the retraction problems - it always fails to unload, from different slots, and needs a small pull at the filament at the back of the printer to then retract. Obviously not ideal in terms of the purpose of the AMS and automatic swapping. I tried printing and adding these Printables as I saw someone on here say that they had helped, but they don’t seem to have made a difference.
I do notice that the Fillamentum spool is the one that has given the most issues (or maybe it’s just the one I have been printing with the most), so appreciate that could just be a size/spool issue with that, but as I say, it happens with all slots, and even with the two Bambu spools.
Any suggestions on what to try next would be gratefully received!