AMS losing connection momentarily

Bambu Lab AMS Troubleshooting
1

I just got my AMS today and installed it on my P1P. It seems to work fine mostly but I’m having 2 weird issues.

When the printer is doing its pre print sequence with cleaning the nozzle and leveling the bed, the ams will lose connection and all 4 slots will blink red. This goes on for a couple seconds and then it’s all back to normal before the print actually starts.

If you watch the slicer device view, you can see all the slots turn white with question marks and then they all disappear. Then everything comes back and and the info for the filaments comes back.

Not sure what’s going on with that. It’s happened twice already working the first 5 or 6 prints I’ve done with it.

Had one more issue where the filament loaded just fine and it purged and everything before the print. Then just before the print started the tool head moved to the front left to cut the filament and it unloaded. As soon as it was done it loaded it back up and started printing.

The AMS hooked up to my x1-c performs perfect so I have no clue what’s going on with this one. Anyone have these things happen before?

2

I have my AMS for a week now and have seen this also but only 1 time. All the LEDs were blinking red. I didn’t know the reason. There was no printing operation running. So I switched the P1P off and on again and the AMS was ok. But my P1P is located in the basement and not near by my desk, it could be, that this happend more than once already. But I’ll keep an eye out for it.

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3

Mine seems to consistently do it when the nozzle is performing the cleaning where it wiped the tab on the back of the plate.

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4

Check the connections between P1P and AMS, including buffer. And swap the AMS with the AMS from the X1C and see if the problem remains. :thinking:

5

Just a well known bug

6

Well known? My search efforts are turning up nothing for what’s happening here. I get no error codes and the printer moves on as normal. The ams just loses connection once or twice during the pre print calibration steps, no other times.

7

I did check all connections, they all seem okay. That’s a good idea. I’ll try swapping the 2 AMS’s when the current prints are done. At least this will let me know wether it’s the printer or the ams. Thanks

8

Earlier this year I was chasing an intermittent issue with all slots of both AMS units flashing double red. After working with Bambu support and driving myself NUTS testing cables we finally replaced the small AMS interface board in the back of the printer and it hasn’t happened since.