I bought a second AMS and it worked for just a shot while and the Hub failed. I thought it was the extruder but it was the Hub. Filament would not go into the extruder. Complaint to Bambu did nothing. They gave me an answer that did not even address the Hub. I removed one AMS and went back to single Hub and prints are working with no problem.
user_2316863165
2024-10-08 15:18:18
Some how I feel like you didn’t read my complaint. It is your filament. Just out of the package. I used the same spools after I removed the Hub. On the 4th print now with NO PROBLEMS. You need to address the HUB ISSUE. Something is WRONG WITH THE HUB.
Bambu Lab
2024-10-08 15:12:34
Hello,
Thank you for reaching out to Bambu Lab support. I’m sorry to hear about the difficulties you’re experiencing with your printer, and I want to assure you that we are dedicated to helping you resolve these issues as quickly as possible. It seems like the problem may be related to the extruder clogging.
There are several potential causes for an extruder clog:
- Material Quality: Low-quality or moisture-absorbed materials can often lead to clogs. Have you tried using different filament types to rule out this possibility?
- Heat Creep: This can occur if the hotend fan is not functioning properly or if you’re printing PLA with a higher bed temperature on a PEI plate in an enclosed space without adequate ventilation. For more information on heat creep, you can refer to our [Heat Creep Guide]
To help address the issue, here are a few steps to try:
- Ventilation and Hotend Fan: When printing PLA with a higher bed temperature, especially on a PEI or other high-temperature build plate, ensure the printer has proper ventilation by keeping the door slightly open. Also, monitor the hotend fan to confirm that it turns on and off as needed when temperatures exceed 50°C.
- Proper Extruder Assembly: If the extruder assembly was recently disassembled, there could be an assembly issue. Please review our [Extruder Clog Troubleshooting Guide to ensure everything is installed correctly.
Additionally, while the extruder is disassembled, you could:
- Share photos of the extruder gear and the inside housing to verify if everything appears normal.
- Try leaving the extruder filament sensor installed with the filament inside and attempt extrusion with the extruder housing removed. This will help identify any slippage in the extruder motor drive shaft. If you do this, please share a video of the process. Remember not to plug or unplug any components while the printer is on and avoid calibrating with the nozzle removed.
We look forward to your response and are here to help with any additional questions or concerns you may have.
Best Regards,
Miles
Bambu Labs Support
user_2316863165
2024-10-08 10:57:48
I had a second AMS attached. It worked fine for awhile. The hub starting blinking with a red light. I thought nothing of it as it is new. I removed the hub as a last chance that the extruder was fine as I had cleaned it and changed the nozzle and reattached the single AMS. I am currently on my 3rd print with no problems. It appears the hub might have been defective. It should be under warranty. Filament is entering the extruder with no problems now. I’m waiting to see if the second color loads properly. It has loaded and printed. It appears the problem is the hub. Second color loaded and printed with no problem.