I’ve been experimenting with the .2 nozzle and printer profiles. First off I forgot to add the .2 nozzle profiles to Bambu Studio and ran my first few prints using the .08 Extra Fine profile for the the .4 printer preset.
Everything looked really good from what I can tell but now I have added the .2 nozzle printer preset to Bambu Studio and now have the .2 profiles that go from .14 to .06mm layer height.
I wanted .16 though in order to get the fastest output when I don’t care about detail. So i duplicated the .14 profile and changed the latter height settings.
The problem is that when i sliced my model, the print time comes out to 12hr but when i use the .4 preset and select the .16 profile, then after slicing it shows only 3hr for the print time.
I tried using all of the speed settings etc from the .4 / .16 profile but the fastest i could get it using the .2 printer preset was 9hr.
So not sure whats up with that but i guess my main question is should it be ok to just select the .4 nozzle preset and the .16 profile when i want to get the fastest print at the lowest quality for my .2 nozzle?
When you select the nozzle profile it changes which process profiles are available and therefore many of the settings.
With my .4 P1P selected, If is select the .2 standard process it will use a .2 layer height and if I select .08 extra fine then the layer height is .08. However, in both cases the extrusion width is the same.
If I then select my .6 nozzle P1P all of the process profiles have line width set at .62.
If you compare the line width for .4 and .2 nozzles you will see how that affects print time by looking at the preview after slicing. If the object you are printing has a wall that is 1mm thick then the .2 nozzle is going to print many more perimeters than the .4 nozzle.
Yes but if i select “Bambu Lab X1 Carbon 0.2 Nozzle” printer preset, first off every one of the filament profiles (.06,.08, .10, .12, .14) is extremely slow on print times. regardless of the parameters. I made a custom profile that matches the settings exactly from the .16 profile in the “Bambu Lab X1 Carbon 0.4 Nozzle” profile and it was still 5 times slower that if you use the .4 nozzle preset with the same profile.
So there must be something in the Gcode settings for the .2 nozzle preset.
i have an 84mm x 50mm x 12.mm object and selecting the .2 nozzle preset the print time is 10hrs and when i switch to the .4 nozzle preset and use the same filament settings the print time is 3hrs.
Because every one of the profiles shown after you select “Bambu Lab X1 Carbon 0.2 Nozzle” has the line width set about half the width of the profiles that are shown when you have “Bambu Lab X1 Carbon 0.4 Nozzle” selected.
It’s under the Filament settings, Filament tab (the first tap) as Max Volumetric Speed. This governs the maximum speed based on how much filament it can extrude per second.
No matter what your speed settings, the printer won’t go faster than what the Max Volumetric Speed limits it to.
ohh yes that. Its at 12mm/s… same setting im using for both the .4 nozzle and .2 nozzle preset… the only difference between the two and all my settings is the selection of the preset for printer between .2 and .4.
the filament settings and my Quality, Strength, Speed, Support settings are all the same between the two and .2 is just wayyyy slower…
I tried to use the profiles that you were mentioning in your original post.
In the image below the most significant difference between the .2 nozzle profile and the .4 nozzle profile is the max layer height. Even though both sides of the comparison are using the .08 extra fine profile the max layer height is different.
I just dropped a 100mm cylinder on the build plate. I let all the defaults apply for number of walls, wall thickness, bottom and top, etc.
Case 1: .4 nozzle, .08 extra fine .4 nozzle and the total print time was 4h33min.
Case 2: .2 nozzle, .10 standard for .2 nozzle
Slicing results:
Case 1
4h33min
192g filament
1249 layers
1 inner wall taking 19minutes
1 outer wall 34m
sparse infill 2h54m
print speed about 167mm/sec for the outer wall, inside wall 308, infill 450
line width .45 for all
flow 6mm^3/s for outer wall, 11 for inner, 14 for infill
layer height .08 for the entire model
Case 2
21h46min
185g filament
1000 layers
3 inner wall 2h35m
1 outer wall 52m
sparse infill 16h25m
print speed is about 100mm/s for the entire model
line width is .24 for the entire model
flow is about 2mm^3/s for the entire model
layer height is .1 for the entire model
Analysis
Because the process profile is using a smaller layer height the .4 nozzle case 1 has 25% more layers to print.
Both cases use the same line width for the entire model, and the affect of that is for the .2 nozzle it needs 3 inner walls instead of 1. This does add some time to the printing.
The smaller nozzle uses less filament because all of the infill is printed at a width of .24 instead of .45.
The major cause of the excessively long print time for the smller nozzle is the max flow rate for the filament is 2 vs. 21 for Bambu Basic PLA. The .4 is running at close to the speed setting in the process profile the entire time. The .2 nozzle is having speed limited to 100 because of the max volumetric flow set in the filament which is only 2.
Surprise!
When I look at the filament profile that I chose, in both cases it was Bambu PLA Basic. However, that means something different based on the printer nozzle profile shown above. That was a big surprise to me.
interesting… I didn’t realize that there’s a separate filament profile depending on the printer nozzle size you pick.
whats also interesting is when I print from the .2 nozzle but select the .4 nozzle preset and choose the lowest layer height .06 i think… the speed is acceptable and the printed results are pretty good.
This leeds me to beleive that there’s a way to get optimum settings for a .2 nozzle with reasonable print speeds.
12hr is just ridiculous when comparing the printed results between the two. you can hardly tell any difference on the final output (3hrs with .4 @ .08 height vs 12hr with .2 @ .08)…
got my 0.2 nozzle today and did a max flow rate calibration with orca slicer and up to 5mm/s it looks just perfect so this can be used to speed things up , i just can recommend running this test on your 0.2 nozzle!
