So I updated my X1c and Studio, and began using the calibration setup for my filaments. Did four or so, and went to bed. Did a couple more today, then I reset my X1c, which told me of today’s firmware update, cool. Download it, and install, reboot X1c, restart calibrating different filaments, but the k factor reported back is way different than yesterdays filaments. Yesterday Bambu Matte filaments were reporteing a k of around .031 to .034, but today a different Bambu Matte color is .017.
I see in the firmware notes, they fiddled with the calibration modes between the two versions, so I’m guessing something was amiss in either yesterday’s version, or todays.
I would like to hear of any clarification on this,before I continue to use Studio to calibrate filaments, and go back to Orca for that. I like the simplicity of using the lidar, since I’m a novice to 3d printing, and haven’t seen printing issues, since the X1c is my first printer.
Could different filament colors be that far apart on the k factor?
Tell me if I should scrap the calibrations I’ve already done, or wtf?
Hate to waste all that time
Could be… Remember too, the values can change on just how it was laid down. So put more gluestick down, could change.
Usually best to start with a freshly cleaned plate, very thin gluestick, use maybe some 90% isopropyl and smear it all around so it’s almost non-existent.
Repeated calibration on filaments I had done before hotfix, and after, got completely different results,
Bambu Matte pla Lemon Yellow k.031 before hotfix, k .019 after
Flow rate before .986 after .972
Another thing Ive seen is my AMS doesn’t recognize filament changes after running a calibration. I have to power off the printer, and then the AMS will load the filament. Also need to restart Studio to update AMS
Flow rate calibration is pointless with regular filaments, just stick to the defaults. The precision of the filament is usually not that good and the volume can vary by a few %, making the calibration pointless. Use it if you are using LW-PLA or similiar, but stick to the defaults for “normal” filaments.
The automatic PA calibration is a ballpark value which makes printing better, but it’s not the best value, for that you need to do manual calibration (possibly even not the one Bambu does, which only has 0.05 steps, but a more detalied one with 0.01 steps). That said, you will likely not notice a difference between 0.02 and 0.025 unless you are printing large cubes all the time 
And yeah, there are still bugs. My X1C forgets K presets after a reset, sometimes presets fail to show and I have to reinsert the spool etc…
flow rate calibration doesn’t work with Bambu SIlk filaments,either
To identify which versions you are referring, could you change the heading form “new” en “yesterday” to the actual version numbers? Please.
A few percent can make all the difference.
Just ask any stock broker, chemist, physicist, explosives expert… hehe