I am experiencing an issue with my Bambu Lab A1 printer and AMS Lite after updating the firmware.
Printer Model: Bambu Lab A1
Printer Firmware Version: 01.07.02.00 (Latest)
AMS Model: AMS Lite
AMS Firmware Version: 00.00.08.15 (Latest)
The problem started immediately after updating the printer firmware.
Issue description:
AMS Lite is detected normally by the printer.
When loading filament, AMS pulls the filament automatically.
The filament moves partially through the tube but does not reach the distributor (hub).
The extruder gear rotates briefly and then stops.
There is no clicking or mechanical grinding noise.
The printer displays a message asking to pull out the filament from the spool holder.
The issue affects all four AMS channels.
Troubleshooting steps already performed:
Checked all PTFE tubes (no blockage, no broken filament).
Disassembled and inspected the distributor (no obstruction found).
Verified that filament passes manually through the distributor without resistance.
Confirmed green indicator light when disconnecting the tube.
Tested manual single-filament feeding without AMS – works perfectly.
Power cycled the printer and AMS.
Disconnected and reconnected AMS Lite.
Verified both printer and AMS firmware versions are up to date.
Since the issue started immediately after the firmware update and affects all channels equally, I suspect a calibration or encoder-related issue within the AMS Lite.
Please advise on further troubleshooting steps or whether a firmware reinstallation or downgrade is recommended.