About half the time recently when printing with PLA, I see that holes or loops have a line of filament running approximately through the middle which seems to be one of the inner perimeters having detached and contracted, but is still attached on both sides. Is it a temperature thing, an extrusion thing? I can’t find a pattern. Bed adhesion is great. Bambu H2C, mostly printing with Bambu Basic PLA.

  • HelloRoot@lemy.lolEnglish
    3·
    10 days ago

    Nothing ever pulls off from an outer perimeter, it’s only inner perimeters of empty loops or holes.

    Isn’t that obvious?

    Try making a circle of a certain size on a flat, empty table, by dragging a string. The circle will become smaller, than the target size because of the part that is already laid down will be dragged inwards.

    Now drag the string around a gluestick, it can’t be smaller than the gluestick’s circle because the gluestick is in the way.