BL & Generic PLA profiles produce same print time estimate

Bambu Lab H2 Series
1

I have a long print using all Creality Hyper PLA on my H2C.
I sliced a model with all colrs using Generic PLA profile.
The resulting Total Time estimate is 1D16H31M
I changed the profiles for all used colors to BL PLA Basic
The resulting Total Time estimate is 1D16H13M

The difference is less than a 1% speeed increase???
Max Volumetric spped difference is 12mm/s to 25mm/s.
Shouldn’t the print speed difference be much better using the BL profile?

2

That totally depends on the maximum speeds in the profile.

If the current speeds are (almost) not limited by the volumetric speed, then this observation is correct.

If you increase the printing speeds, you will start seeing a bigger difference.

3

I’m using .16mm High quality so that may be it.

4

And I am assuming you updated the max volumetric speed in the generic profile to match the Creality Filament.

5

For comparison print estimate I just changed the profile from Generic PLA to BL Basic PLA. Just trying to understand if using a higher max volumetric flow profile just works or if I have to learn what to do to take advantage of it.

6

Did the same model using .16 Standard Quality and although there is a significant difference between High and Standard print profiles. The filament profile difference is still very marginal:
.16 High Quality
Generic PLA 1d/16h/31m
BL Basic PLA 1d/16h/13m

.16 Standard Quality
Generic PLA 1d/ 5h/40m
BL Basic PLA 1d/ 5h/21m

Is it only on .2 layer height or greater where it would make any real difference?

7

With a larger layer height and the same speed settings, your volumetric flow will increase, but if the highest feedrate (usually spare infill) is not running against the maximum volumetric flow, you won’t see any difference in time.

Try the 0.8 nozzle with 0.4 layer height and switch between the two filaments (make sure VF is still correct in those profiles). I suspect that you will see a bigger difference in printing time.

8

That makes sense. Thanks for the clarification and helping me on my journey of 3D knowledge.
If most of my prints are going to use smaller layer lines for more detail than it would not make sense for me to spend the extra money to get HF nozzles for my H2C then. I was debating…