How to fix the hms_0701-0600 error in the Bambu Lab AMS
The Automatic Material System (AMS) in Bambu Lab printers monitors the filament precisely. Each slot has an integrated scale that weighs the spool and compares that value with the information stored in the same RFID tag. When the numbers don't match, the system triggers the HMS_0701-0600 code and requests your intervention. 🚨
Why does this discrepancy error appear?
The HMS_0701-0600 message is an inconsistency alert. The RFID tag stores the initial filament weight and calculates how much has been used. If the weight sensor in the AMS measures a very different value, the system assumes there's a problem. Typical causes are changing the spool without notifying the AMS or the RFID chip data becoming corrupted. The system prioritizes preventing print failures due to suddenly running out of filament.
What happens when the error is triggered:- The AMS stops automatic use of that specific spool to prevent print failures.
- The printer displays a screen message with two values: the weight measured by the scale and the weight expected by the RFID.
- Manual user confirmation is required to decide which data is correct and proceed.
The AMS can be as meticulous as an inspector scrutinizing every gram, especially if you take a bit of filament for a test and hide it from it. 😅
Steps to resolve the error and resume your work
To fix the HMS_0701-0600 error and make the filament counter accurate again, you must act from the printer screen or from the Bambu Studio software. The process is straightforward and allows updating the system's internal data.
Correction procedure:- Access the error message. There, the measured weight and the expected weight according to the RFID are compared.
- Select the correct value. In most cases, you should choose the actual weight recorded by the AMS scale.
- Confirm your choice. The system will update the RFID data with the new weight and reset the used filament counter for that spool.
If the problem persists
Sometimes, the error may reappear with a new spool or not resolve with simple confirmation. If this happens, try resetting the data for the conflicting slot from the AMS settings menu on the printer. Another useful option is to test the same spool in a different slot in the AMS; this helps rule out that the failure is specific to the weight sensor in one slot. Keeping the RFID data synchronized with the physical weight is key for the AMS to function without issues. ✅