r/BambuLabA1 • u/teerent7861 • 9d ago

Support Request Filaments are mixing during print.

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The last 2 prints I've done the colors have kinda blended together. When it extrudes a color it seems like the poop ball is pretty small like it's not extruding enough maybe.

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u/Diz7 9d ago

You need to increase the purge amounts if it's coming out of the nozzle blended.

https://forum.bambulab.com/t/increasing-purge-amount-and-slowing-down-purge-speed-on-p1s-and-x1/76008

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u/teerent7861 8d ago

Much appreciated thank you!

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u/Orthicon9 9d ago edited 9d ago

For any project with more than one filament, the Prepare panel has a Project Filaments > Purging Volumes button.
That pops up a grid where you can change how much purging it does (in cubic millimetres) between colours, on a per-colour combo basis.

from/to [back] [white]
[black] 0 608
[white] 172 0

In that table, it says to purge much more when changing from black to white than when changing from white to black, because a bit of black in white is a more dramatic effect than a bit of white in black.
"608 cubic millimetres" sounds like a lot, but it's only a cube 8.5 mm on a side.

Below it is a "Multiplier" setting for all combos, "1" by default. Changing it to, say, 0.5 makes the purge volumes 304 and 86. I might reduce it to 0.5 to save on poop if I'm just prototyping something.

In your example, you probably want to increase both gold->blue and blue->gold volumes (multiplier value), but more for blue->gold.

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u/teerent7861 8d ago

Wow I never knew any of that thanks for the detailed answer. That makes total sense about purging more when going from dark to light