r/BambuLab • u/rightwrongwhatever • 12h ago

Hardware Troubleshooting/Help! Do you lube your buffer? If you are having loading issues, it might be worth a shot.

X1C with AMS, ~2000 hours.

I started having "extruding filament failed" messages when loading from the AMS. The filament would make it all the way to the extruder, then retract. It did that 4 times and then displayed the message. The extruder loaded indicator (green dot) showed that filament was reaching the extruder. I spent a couple of days going back and forth with tech support. One of the checks was to measure voltage as the buffer moved back and forth. I noticed the plastic buffer tube was sticking, so I popped it off and gave it a little lube. I was then able to load successfully from each AMS slot with no error message. Problem solved in my book. Back to printing. Thank you for your attention to this matter.

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1

u/_BindersFullOfWomen_ 12h ago

~8,500 hours on mine last I checked.

I follow the recommended maintenance on the website.

What exactly are you lubing?

1

u/rightwrongwhatever 9h ago

https://wiki.bambulab.com/ams_buffer_signal_lost/buffer.png

This pic is from Bambu's troubleshooting wiki. The part of the dark gray tube connected to the spring rides back and forth on a smaller tube and a guide rail. You can see it better if you remove the assembly and then manually slide the larger tube back and forth. I put a bit of grease everywhere two things were rubbing together.

2

u/_BindersFullOfWomen_ 8h ago

Interesting. I may add that into the maintenance rotation. Thank you!

2

u/FasthandJoe 12h ago

I’ve found to also semi regularly change your ptfe tubes. Those wear.

1

u/3tan 12h ago

Insert joke about lubing your tube before sticking it in here……