AMS filament odometer has no signal error

Has anyone gotten this Filament Odometer Sensor Error? My AMS keeps rolling the filament in and out, really scraping the filament each time (not normal). This happens about 8 times before I get an AMS error. It makes a clicking sound like a machine gun doing Morse code. It happens on all the roll slots. The Filament Odometer error has come up sometimes as well as the AMS error when I try and debug this problem(s).
I can heat the nozzles, move the axis’s just fine, no filament flow obviously. I really could use some good advice on what to do.


1 Like

Yes, I can do an 8-print with no problems.
Doing a few skedis boards 320x320.
But when you go to do it again or another, it comes up with what yours is saying, or both AMS slot 1 assist is stalled due to excessive resistance in the tube between AMS and the filament buffer.
Quite a lot now, and it’s not just slot 1; if I use another slot and do a print, it will do the same. So how many is it happening to?
If anyone can give advice for both of us, please…

Is the filament reaching the main extruder at the print head, and are both nozzles functioning the same way?

Dear, I had the same problem. I followed the HMS_0700-0200-0002-0002: AMS A The odometer has no signal. The odometer connector may have poor contact. | Bambu Lab Wiki but no success.
I opened a ticket and I am waiting the support response.

2 months passed. any response?

I have the same problem with my AMS 2 Pro since yesterday. The second ams works fine. Cabel and plugs are ok, waiting for my ticket to be answered. Could you fix it?

Dear, I sent them some videos and checked out everything they asked. The problem persisted. The AMS2 was on warranty and they gentely replaced for a new one. Besides the trouble and annoying, finallly it was a good response from BambuLab.

1 Like

Thanks for the information. I will get a new hub and cabels the next days. I hope it will be fixed then.

Just got this error towards the end of a 26 hour job. Re-inserting the cable did not fix it. All AMS 2 slots affected. Ticket opened.

This is the first significant issue with my launch H2D/AMS2 after 965 hours of use.

Did you open a ticket before checking if there might be other issues?

Does the filament reach the extruder? If not, please check the entire path from the AMS to the extruder for any broken pieces of filament or obstructions.

If it does reach the extruder, please check the extruder and follow the path down to the nozzle.

In my case the new hub for the ams 2 pro fixed the problem.

I had the same issue and I managed to solve it myself.
It was a suprisingly easy fix. All I had to do was to replace hall sensors on the odometer PCB.

My AMS 2 Pro started throwing odometer errors after barely a month of usage. I disassembled it and tested my odometer board outside. Basically there are just two hall sensors on it, which together with a magnetic wheel form some sort of a rotary encoder. Turns out one of the hall sensors have died. The sensor they’ve used is a latching type and runs at 3.3V. Based on the markings it looks like MT1401 from MagnTek. I found a suitable replacement - Honeywell SS460S and swapped both sensors, just for a good measure.

And boom! It works again!

1 Like

Same issue here with the AMS 2 Pro, tried following the troubleshooting guide but didnt help. Opened a ticket to Bambu Lab. In my case the RFID reader also stopped working.

1 Like

Ive had the same intermittent problem since May. i opened a ticket in May, they asked for video, took me a while to replicate the fault. caught it on video sent it to them. still giving me the run around. Now asking me to dismantle and clean the filament hub. Its clear their AMS2 has a fault from all these other posts. Demanding they replace it as its still in warrenty, fed up of their delays.

1 Like

The Honeywell SS460S, how did you manage to know that that is the problem and how did you replace? DId you desolder and solder the new ones you bought? Do you have some photos? Thanks