Just upgraded to an X1C and was really looking forward to using the lidar for auto calibration. I use Sunlu PLA+ 2.0 (buy it in bulk) and the first run gave me a flow ratio of .951, which seemed solid, prints were looking great. After a firmware update, I reran calibration just to be safe, and now I’m getting failed calibrations or wild results like .85, .90, and all the way to 1.14. Tried everything I could think of: cleaned the camera, factory reset, rolled back firmware,upgraded firmware, changed beds (cryogrip, supertack, textured PEI), fully dried filament, straight up changed filament (Bambu Basic, PETG HF, Voxlab HS PLA, Creality PETG), light on/off, etc.
Thought I had a dud, so I swapped it out for a new one. Two hours out of the box and same issue. Calibrations are all over the place. Printed a tolerance test with the “calibrated” profile at .901 and all but the loosest pin was tight, which tells me flow should maybe be even lower… but that seems way off. Flow dynamics values are .017-19 which still seems off but not AS bad.
Anyone else using Sunlu getting results like this? Or am I just expecting too much from this printer? Appreciate any help. I’m at a loss, no error codes that signify that something is actually wrong. I feel like it HAS to be me, but I have zero idea what I’m doing wrong. This thing just doesn’t work the way I thought it would
i can confirm that the X1C upgrades including the slicer updates that happened after the H2D release has issues, and i as well can confirm just the recent firmware upgrade the accuracy went bad in many aspects such as flow ratio, z offset, pressure advance.
what made me notice all of that is normally i base my design on my machine tolerance, after the last firmware tolerance went from 0.1mm to 0.5mm and it is still too tight.
i would run the auto calibration again if the result is not satisfying but it is still not as good as it used to be.
Note: my machine is well maintained, and just about a week before the update had my machine cleaned, lubed, belts tensioned and ran the full calibration just to keep it to my standard, it only went haywire after the firmware upgrade.
Edit: just yesterday i had an error saying the filament is tangled in the extruder, but it wasn’t, the error persisted until i had to cancel the print and started it again just to stop seeing the error, and few days back had a layer shift…the thing is they are random errors with no physical issue in the machine, and when i cancel the print and rerun it the issue is gone.
I no longer have any automatic calibration options on my X1 Carbon—currently, it only supports the Orca-style calibration. Only my H2D still has the automatic calibration for K-value and Pressure Advance.
That said, the manual (Orca-style) method works just as well. It takes a bit more time, but it’s often said to be more precise in the end.
I’ve found that a matte/flat, light colored, and smooth plate along with all chamber lights off gives me the most accurate auto calibration results on both my x1-c’s. I bought a Darkmoon white g10 plate specifically for this purpose.
I was unaware of this issue until your comment; to be clear, from what I got, the problem relates only to current automatic calibration values, whose results are out of the expected range and lead to bad print quality, correct? Is it solely for pressure advance or flow rate?