We have (20) AMS/Lites hehe, but yeah as Nakleh mentioned it’s extra automatic now with the AMS you can’t even override the discovered filament anymore. (Hopefully they change that back since we do get an errant RFID tag every now and again.) Too be honest though we don’t do tuning anywhere near what you guys are doing (love to see that!) We are a moderate volume farm that prints at conservative (for Bambu) speeds because print failures are the most expensive thing for a farm. Once more of the machines are automated and running the same part we will probably spend the time to tune it. For now I might borrow your settings and see how it goes LOL
It’s not as satin as I thought it would be. It’s less glossy than regular Bambu PETG, but still glossier than PLA Basic.
I wish it was even more satiny though 
Printing slow is smart- printing an item slowly is faster than printing it twice 
And the beauty of Bambu filament is you don’t have to tweak the settings, generally they are very good- but they can be tweaked to get a bit more here and there. I didn’t tweak anything for the first 3 months I was printing and had zero problems. Problems only started once I STARTED tinkering!
Thanks for this, after 3 days on and off I was just not making progress. But following your guide I did the following. Basically a sanity check!
- I emptied the AMS, leaving two Bambu branded filaments in the AMS. A1 PLA, A2 PETG GF A3, A4 empty.
- Did a full sync, in Prepare I see A1 Bambu PLA Silk A2 Bambu PETG HF (so far so good)
- In Prepare filament A2 I change it to a test Filament called “Bambu test PETG HF @BBL X1C”
In this file I have set some silly numbers.
Flow ratio = 1.11
Pressure advance 0.1111
Max volumetric speed 11.1
I did this so that I could find them easily in the Gcode file.
- I then did Slice plate and did Export G-code file (test_PLA_10m20s.gcode)
- I open the gcode file, (not sure why it has PLA in the file name) I find the numbers as follows.
+/-line 112
; filament_flow_ratio = 0.98,1.11
; filament_ids = GFA05;GFG02
; filament_is_support = 0,0
; filament_load_time = 0,0
; filament_loading_speed = 28,28
; filament_loading_speed_start = 3,3
; filament_max_volumetric_speed = 12,11.1
; filament_minimal_purge_on_wipe_tower = 15,15
line 289
; pressure_advance = 0.02,0.1111
So, I find the values in the Gcode in the commented section. What is the first number for and, which number is the printer using? The first or second ones?
I suspect the first number is a default number? If this is so then I think that I have confirmed your info, wonderful!
I do feel disappointed that even when using the official Bambu filament, that things don’t seem to be doing what I expected. Actually it’s almost easier to use none Bambu branded filament as then you can see in the AMS that things are correct. Anyway, I hope they fix it, as you mention that earlier the profile dropdown did work.
Thank you very much for the guidance. It was really bothering me, I thought that I must be doing something wrong.
Incidently, I do have the test results for Esun PETG-HS (high speed) I will put them here, it’s also a good filament but with lower max volumetric speed than the Bambu one. But maybe it’s better in other aspects, I don’t know.
Yes, agree. Honestly, I do quite a bit of printing in silent mode. Because the printer is in the home and it’s nice not to hear the thing. It might last longer too :), but I do like the fast modes when prototyping. For my part I was curious about how hard this filament could be pushed, but also hopefully to get a nice finish and dimensionally decently sized parts.
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Based on the numbers you entered, the first number seems to be the default and the second are the tweaked settings. Nice!
You should look at the g-code again, because all those lines begin with a semi-colon which makes them comments, not commands. Not saying you’ve reached a wrong conclusion, but these lines don’t do anything…
Commenting Your G-Code
[The semicolon character “;” is used to indicate the end of a command. Any text following after a semicolon (and before a new line) will be ignored by the software, which makes it a handy place for comments. This is particularly useful when making batch scripts.
Notes
- A line that begins with a semicolon will be treated as a comment.](Useful G-Code Commands for the MPCNC - General - V1 Engineering Forum)
+++++++++_
EDIT
If I set a silly number for searching, like .088 for PA, I find it further down in the g-code:
; Filament gcode
M900 K0.088 L1000 M10 ; Override pressure advance value
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Hi, thanks, yes, I knew about the use of ; as comment. I was using Notepad++ and the search was set to “Match whole word only” So the search didn’t find the M900 code because the PA is prefixed by a K ie. K0.0889. So after correcting the search, it shows up in both the comment section and the code section.
line 272 ; pressure_advance = 0.02,0.02,0.064,0.0889
line 1232 M900 K0.0889 L1000 M10 ; Override pressure advance value
But then I searched for Flow Ratio=0.9492 and Max Volumetric speed=25.123
Both Flow ratio and Volumetric speed do show up in the comment section, but not in the gcode section.
line 108 ; filament_flow_ratio = 0.98,0.95,1.0241,0.9492
line 114 ; filament_max_volumetric_speed = 12,12,21,25.123
Maybe flow ratio and Volumetric speed are calculated into other numbers and used that way somewhere in the gcode?
The comment section does seem to be used to store many Bambu settings.
So I’m confident that the printer is using the Filament settings from the Prepare section, I just don’t know quite where in the gcode.
Thanks for taking the time, now I can finally put this to rest and know that the tuning settings are being utilized