Ever since installing the new BS update, I’ve been having trouble with a couple things, most of which seem like overextrusion issues…
First: Using the 0.2mm nozzle, I print keychains with two colors on the first layer. Before the update, the edges between the colors were nice and crisp, after, the edges are blending together. I managed to get around this by completely changing the model and the order that the first layer colors are printed. Recalibrating filament flow did not help.
Second: A different model I print regularly that uses supports. Before the update, the supports snapped off easily and cleanly. After the update, I had to use pliers to break them off and the surface looks like garbage. NO other settings changed other than updating bambu studio. I confirmed this today by re-installing 1.8.4.51 and running the job again. The supports snapped off like they have always done.
I had the same two issues - with the update I lost the crisp & fine detail and I ruined my model trying to get the supports off.
I have regressed to 1.8.4.51 also. The deal breaker for me was taking 30 minutes removing support that took me less than a minute with 1.8.4.51. Busting up the model was the push I needed to go back one update.
What it did do was to make me clean the extruder, re-dry four rolls of filament and run calibration. None of that made a diff.
somewhere between the latest updates and the kfactor things something seams broken on my a1 too, i print always the same since i have the printer and had no over/underextrusion issues with PLA an k-factor of 0.020-0.025
now since a week i cannot get my model printed the same as before i always have overextrusion issues… seams kfactor not working or flow compensation is to high?
same pla/settings as always and after a while i tried drying some spools with the same result… also tried another nozzle and cleaned every gear in the print head and ams lite…
will try your suggestion to downgrade to 1.8.4.51
attached a picture of the issue as well , left the new one, right the old smooth one
tried 1.8.4.51 with the same print, settings and my noted k-factor
first print came out flawless smooth again!
so there is a confirmed issue, but i was already on 1.9, will try to test which version breaks it
Gave it a shot and rolled back shortly after.
As I calibrate my rolls all the time I saw no issues here, until I updated.
Profiles you established for a great print quality are turned useless.
3MF files you saved in order to get repeatable results are producing one failed print after the other.
Supports either fail or are impossible to remove.
Parts with missing sections now ruin all layers until the model has a full area again.
Worse still:
On some models with a vertical wall all around the top layers now often come out much larger than the rest, like an added lip or balcony in some cases.
No problem, can only be changes for the flow rate- and k-factor calculations, so once that is done again all is fine…
Nope…
Vase mode and infill calibration always produce different results but now it seems the shape of the model also impacts on those calculations.
There is no consistent way any more to calibrate the filament in order to get a good print quality.
If it works for one model it is certain to fail for a different one.
Whatever Bambu changed they messed up some vital flow calculations.
As if their sole focus was on improving minor issues without considering that it might require matching those flow rate and pressure advance calculations accordingly.
It also seems that certain sections now print MUCH slower than what they used to but instead of getting a better result it is just garbage
That’s the problem with copy and paste jobs on closed source software - you loose track of the many things that get changed…
1.8 somoething.
With the 1.9.1 I managed to get the settings to work again but I am not in the mood to repeat this for all models I created and saved as 3MF files already.
I’m having a major over extrusion issue with my printers after the new update as well. I’ve been printing the same model at 100% infill for the last 6 months. Albeit there was some tuning in the beginning, I was able to get a great finished part using the same settings for each printer. I found that this particular model would print perfectly with 100% infill using eSun PLA+ default settings and changing the k factor to 0.000. This gave me the best results with both my X1C’s and P1S’s.
I have 8 P1S machines, 3 of which were just added to the farm after I updated to the latest 1.9.x.x version. The first prints on 2 of them were mediocre at best and the third was over extruding toward the end of the print. Perhaps I wasn’t paying any attention to it throughout the duration to notice earlier. However, 1 of my machines that has produced this part countless times suddenly started over extruding, and not just a little bit, it was a lot. enough to hear the nozzle bashing against the print while the tool head was moving.
I did update the firmware of the machine to 01.06.00.00 (maybe this is incorrect but it was the latest version as of two days ago. So at first I thought that it was a firmware issue so I reverted to the same firmware as all the other P1S machines 01.05.02.00? I think? Either way, this was not the issue. I should add that I’m using a 0.8mm nozzle and it has been replaced.
Everything was fine until the BS update prior to the latest version and I didn’t put that together until reading that other people are having the same issue. I held off on updating BS because everything I was printing was printing fine. Then one day I sliced the same file I’ve sliced 200 times and Windows gave me the BSOD… Weird… rebooted and tried again and same thing. So I updated to the latest version and magically I can slice the file again…
I’m going to revert to 01.08.04.51 and try the same print with the same settings. I’m hopeful that after seeing this post that this is the solution. I’ll post back with my findings.
This has been basically resolved for me since a couple updates ago. A couple days after I posted this, they updated BS again and there was a bugfix for supports. That’s what did it for me. Everything is back to normal again.
