Different Filament “strands” in the final layers of prints.
P1S / 0.4 Nozzle / Standard print profiles / AMS 1
I do a lot of prints where the first 10-13mm is a single colour and the last 4mm is a different colour.
When it comes to the final layers of the whole print, strands of filament (different colour) from the first 10-13mm appear, ruining the print.
The issue doesn’t affect every print, but the chances of it happening will persist for long periods (weeks). Then, I will have periods where it doesn’t affect prints before returning seemingly at random.
This issue occurs across all print profiles and filament types. I primarily used Bambu, but also experimented with Elegoo PLA, utilising the Bambu profile/generic PLA profiles.
It is usually the initial colour that appears in the final layers of the second colour, so if it’s red to white, then red “strands” appear etc.
The presentation can be a small light “strand” to heavier imperfections, as pictured.
I have tried increasing the flush volume, but as far as I can see, it is only the last few layers that are affected. I regularly clean the nozzle. I did a nozzle swap which initially fixed the issue, before it came back a few weeks later.
Pictures attached - thank you for any help.
