How to Fix the HMS_0100-0701 Error on Bambu Lab Printers
When your Bambu Lab printer displays the HMS_0100-0701 code, it is protecting your work. This message means that the firmware found a difference between the nozzle size expected by the instruction file and the one identified by the hotend system. The machine stops to prevent miscalculating the filament flow and ruining the part with extrusion defects. 🛑
Understanding the Cause of the Failure
The G-Code generated by your slicer contains specific data, such as the nozzle diameter. The printer's electronics checks this parameter against a reference value. If there is no match, the error is triggered. This prevents serious problems: too little plastic creates weak and hollow layers, while too much produces excesses and deformations. The printer is precise and prefers to stop rather than compromise the result.
Steps to Fix the HMS_0100-0701 Error:- Open your project in Bambu Studio or the slicer you use and review the settings of the active print profile.
- Confirm that the nozzle diameter set in the software exactly matches the size of the nozzle physically installed on your machine (e.g., 0.4 mm).
- If you changed the nozzle in the hardware, update the printer profile in the software with the new size and regenerate the G-Code from scratch.
The printer detects minimal differences, in tenths of a millimeter, that the human eye cannot perceive. Its priority is to ensure perfection, even if that means pausing your project momentarily.
Strategies to Prevent the Error from Reappearing
The key is to synchronize your digital configuration constantly with the physical state of the printer. An organized method eliminates these setbacks and speeds up your workflow.
Recommended Practices to Prevent the Error:- Create and save specific material profiles for each nozzle size you use (0.2 mm, 0.4 mm, 0.6 mm, etc.) and assign them clear and identifiable names.
- Before slicing any model, make it a habit to verify that you have selected the correct profile corresponding to the currently installed nozzle.
- Avoid reusing old G-Code files after modifying the hardware. It is always safer to slice again with the updated configuration.
Conclusion on Error Management
The HMS_0100-0701 is not a system failure, but a safety feature designed to protect the quality of your prints. Ignoring it and forcing the print will only lead to wasting time and material. Adopting a disciplined procedure for managing print profiles will save you unwanted pauses and ensure that every project runs with maximum precision from the first layer. ✅