Manual calibration of flush volumes

Right now the flushing works sort of…
The calculations are based on colour values if I am not mistaken.

I would love to have the option to do a manual calibration of flush volumes for what’s in the AMS.

For example:
Select to flush for a filament change but stop it an note the value when the user presses stop.
A visual confirmation so to say.

Much nicer of course would be a dedicated calibration similar to what is used for the K-factor.
Like printing sets of lines WITHOUT the build in flushing to determine the actually required amounts.
Some filaments are forgiving, some are far from it.
Being able to get accurate flush volume can be a real cost saver on big (or many) multi-colour or multi-material prints.

maybe you can just manually set the flush volume to zero and then print a very long double-color line
first measure the length of the color-changing line and then calculate the volume?

Sure but that means having a line model and having to print it.
And it won’t turn off the auto flush to get rid of the old filament as far as I know.
The normal purge still happens.

Plus, it would be more convenient to just push a button and get a line print for the installed rolls and their combinations. :wink:
Might be just me being lazy though after doing doing so many multi-colour prints lately…

Although not integrated as a slicer calibration, something like this already exists:

https://makerworld.com/en/models/69131

Yeah, I know, shamless self promotion. - But the included print profiles really make it easy and the lack of a slicer integrated calibration is exactly why I published it roughly a year ago…

What I recently found during calibrating all flushing combinations of two full AMS units:

  • 9 out of 56 changes were off by more than 200mm³. (In BL’s defence, not all was Bambu filament - but even within those changes they were off in half of the cases…)
  • 4 out of 56 changes were insufficient and needed more flushing

Link to my post about that: AMS - flushing volumes calibration & purge reduction - #5 by AMT_MW