I’m reaching out for ideas or insights regarding a persistent issue with X1C where Flow Dynamic Calibration consistently fails - despite extensive troubleshooting over the past weeks/months.
TL;DR:
Calibration always fails (“Result could not be saved”), despite latest firmware (v01.09.01.00) and Bambu Studio (2.1.1.52).
Calibration process appears to complete (no crash or direct error on the printer, “ok”), but the result isn’t saved at Studio.
LiDAR module already replaced, changed.
Cables were found pinched during reassembly; inspected and re-soldered — no change.
Another X1C with same filament, plate, and profile works fine.
Laser visibility note:
At first I thought the laser wasn’t working, but later learned it’s only visible using the printer’s internal camera - not to the naked eye oder mobile phone in my place.
Background Timeline:
Early 2024: Calibration used to work. After several firmware updates, calibration began to fail - no changes to environment/setup; Ticket at BambuLab. Communication with BambuLab difficult, no response.
June 2025: Installed FW v01.09.01.00 – no improvement.
Replaced LiDAR module - Movement and white reflection visible during calibration, no errors.
Ran tests with known-good filament (Bambu PLA, PETG HF), on clean textured and smooth beds, in complete darkness, and with external light off.
Factory reset + reinstallation of Bambu Studio, firmware, and profile database ; still no success.
Printer was unlinked and tested under a completely different user ccount/system ; issue persists.
LiDAR sticker clean, aligned, and white reflection visible during calibration process.
Studio always shows same error: flow result cannot be saved.
Important Finding:
While rechecking the hardware again, I discovered that one of the LiDAR cables had been pinched by a screw behind the rear toolhead plate.
The damage wasn’t immediately visible - the insulation looked okay, but under direct light, the deformation was clear.
I carefully desoldered and resoldered the affected LiDAR wires to restore clean contact - but unfortunately, the exact same behavior remains.
Cables checked:
LiDAR to Toolhead PCB (FFC) - re-seated and re-soldered.
Toolhead PCB to Mainboard (FPC) - reseated.
Power cable (JST) - confirmed: white light present, LiDAR moves correctly.
Open Questions:
Could a partially damaged FFC/FPC cable cause such silent failure?
Is there a way to verify Toolhead PCB integrity before replacing more parts?
Any way to trigger more detailed LiDAR diagnostics or debug logs?
Status with Bambu Support:
Unfortunately, Bambu Support has actually stopped responding to my case, despite multiple follow-ups and shared diagnostic materials (videos, logs, and firmware test results). At this point, I no longer know what else to try.
Given that LiDAR-related changes have been part of recent firmware updates, I suspect that some overlapping issues may be making this harder to isolate. It’s very difficult to tell whether I’m dealing with a hardware fault, a firmware bug, or both.
Available Media:
I recorded a few videos of the Flow Calibration process. Laser not visible to the eye ; but visible using the X1C camera, as expected.
Has anyone here experienced something similar — or have any further suggestions? I’m completely stuck at this point and would greatly appreciate any ideas or input.
After continued issues, I contacted Bambu Support directly via live chat to push for escalation. Unfortunately, no meaningful progress has been made yet — still no working Flow Dynamic Calibration.
In the meantime, I disassembled and reinstalled the LiDAR module again, checking all connections thoroughly. I also performed another full factory reset on the printer, reinstalled firmware and re-linked it to a fresh user account. Sadly, none of these steps made a difference — the calibration still appears to complete, but the result cannot be saved in Bambu Studio.
At this point, I’m really wondering:
Has no one else encountered similar behavior with Flow Calibration failing silently like this?
Or could I have missed a previous thread covering something like this?
Any confirmation or input would be very much appreciated — even just knowing whether others have seen similar symptoms would help a lot with troubleshooting direction.
I got an X1C at the anniversary sale, out of like 30 flow rate calibration tests across 20 different filaments and two build plates it has only completed successfully ONE time. This is one of the reasons to buy an X1C over much better priced P1S. Has it really been messed up with no Bambu responses this long?
I am experiencing the same thing. With both the Flow Rate Calibration and the Flow Dynamics. The internet says to try manual calibration, which I have. But I still feel the auto should be work and be reliable, which is what people claim about Bambu’s products.
I have had to do manual for as long as I have had my printer. It would be great if it actually worked bu I think it’s more of a gimmick than anything else.
Hii! I bought an X1C the day before yesterday and decided to calibrate some filament (not Bambu) - I got the error “Part of the calibration failed! You may clean the plate and retry. The failed test result will be dropped.” I decided to try and calibrate the included Bambu PLA Basic (Green) filament - and again got the same error. I performed the calibration several times with different filaments - the result was always the same. But its only on Flow Rate (Dynamic Flow working)
Bambu Studio version - 2.2.1.60 (macOS Sequoia 15.6.1)
X1C firmware version - 01.10.00.00
I’m facing exactly same problem as author. I bought an X1C a week ago with firmware 01.09.00.00 and immediately after the purchase I upgraded to the latest version 01.10.00.00
When I decided to calibrate flow rate, I got exactly same error. At same time calibration flow dynamics is working correctly.
I tried to roll back to previous old firmware 01.08.02.00 - it didn’t help. I went back to last one, but it didn’t help either. Resetting to factory settings didn’t help either.
I have another X1C that I bought over a year ago. He has an old version of lidar. Everything is working fine on it on latest firmware.
I assume that problem is not on firmware, but some kind of malfunction of new version of lidar.
Small update. In my case, on firmware version 1.08.00.00 and lower automatic calibration flow rate worked. Results are not very accurate - for example, in manual mode I get 0.98, and in automatic mode I get 1.02.
