Different error at the very end of every print

Bambu Lab X1 Series Troubleshooting
1

Out of nowhere I’m getting different errors at the very end of every print, when the printer tries to purge remaining filament into the excess chute.

The errors are varying:

  • “Please remove the external filament from the extruder. If an AMS is to be used later, please connect the PTFE tube to the coupler and click the “retry” button."
  • “Timeout purging old filament: Please check if the filament is stuck or the extruder is clogged. After troubleshooting, click the retry button.”

Prints are looking fine, no issues. I’ve run cleaning filament and done a few cold pulls.

When the error happens the printer always thinks an external spool is connected, which is kind of strange.

It also displayed a message that filament has run out in AMS SlotX, which isn’t the case.

After switching the printer off I can unload filament from the AMS and start a new print without issues.

Does anyone have an idea what might be causing this?

2

I had something very close to this problem. Long story short, it was the filament runout switch. Thee switch it self was hanging up on the side of the pcb bracket. This part is the clear one on the extruder. I finally got the switch to move reliably. I had to use a small rat tail file to get it to work smoothly again. I also bought a new extruder but it is still in the box two months later. HTHs

1 Like
3

Thanks for the info @Barryg41. Did you have to remove the extruder for this?

What’s also strange: after starting the thread I opened a support ticket and had to remove the SD card to upload logs.

When I put the card back into the printer it suddenly showed the correct state and I could unload the filament from the AMS.

A few minutes later the AMS was blinking red again and the printer didn’t show the AMS at all, just the external spool :thinking:

4

Yes, i had to remove the extruder. Learned a lot! First failure with over 1100 hours. Partial failure. It still works. There is a wiki for this teardown. Be careful with the jst plugs.

I think it takes a couple minutes for the printer to be at ready state. Then shows previous errors if still present.

2 Likes
5

Well, mine’s like 6 weeks old. So I’m not really in the mood to do any repairs tbh.

6

@Barryg41 you’re analysis was probably spot on. Support came up with the same cause and agreed to send me a new sensor.

The shipment arrived today, only problem, it was a textured PEI plate instead of a hall sensor :joy:

Since I can still print I’ll wait for a new sensor in case the current one can’t be repaired.

7

I bet you thought that was one hell of a hall sensor. :smiley: Maybe they will let you keep the plate.

So six days later you have a part? Wrong, but they are getting somewhat faster on problem solving.

1 Like
8

Seems like. Although I have the impression that EU support is generally a bit faster.

9

Took a while, but I finally have some updates…

  1. I could keep the textured plate BBL did sent me instead of the hall sensor :slight_smile:
  2. I received a new hall sensor a week later, but didn’t have time to look at the replacement until some time last week. Opening the box I discovered it was the wrong part again, this time it was a P1P hall sensor :rofl:
  3. So I did the same as @Barryg41 and shaved off a bit of the corner of the sensor housing to make the sensor work again. I did this without disconnecting the cables.
  4. Unfortunately it turned out that the AMS problem had a different cause. At this point the AMS didn’t connect at all anymore :frowning:
  5. I opened another issue and received a new filament buffer + 6pin cable + AMS power board 6 days later
  6. Replacing the filament buffer brought the AMS back to life and I’ve since completed a test print without issues

While there are obviously still some issues with support, I must say that the overall experience wasn’t bad. Support responded quickly and shipped replacement parts in a reasonable time.

Obviously the printer was down for a while, but after all I have a working printer again, some spare parts and another textured sheet.

1 Like