Setting up a brim/raft for only a portion of the overall print

  • I'm trying to build an assembly with one larger part (about 50 mm x 50 mm), two small parts (about 10 mm x 5 mm) each, and one part that starts with two 2 mm x 2 mm squares that eventually bridge into a sort of flap. The larger part has decent adhesion for a couple of layers, but the small parts are slipping off the table right away and the nozzle drags them onto the large part since it's the last part being printed in the group, resulting in some stringing.

    My bed is adequately leveled and can print larger models well so my suspicion is that the small parts are too small for good bed adhesion and need a brim or a raft to increase the surface area. Is this correct? If so, is there a way in Cura to add a brim or raft to the small parts and not the large part? Ideally I would print all pieces at once instead of the large part separate since I will be doing batches of these assemblies in the future.

    I'm using Ultimaker Cura 3.6, printing with PLA filament set to 200 °C at nozzle and 60 °C on the bed.

    For information, Super Slicer has per-object brim.

  • 0scar

    0scar Correct answer

    4 years ago

    This is a "No" and "Yes" answer, it depends on the version of Cura you are using!

    No, there are no options available to set the brim to some of the parts in Ultimaker Cura (at the time of writing this answer, pre Cura 4.5.0). You could however change the smaller model to include the brim in your design, or add so-called "Mouse Ears".

    At the time of writing this answer, the image below shows the Ultimaker Cura interface for "per model" settings, basically different settings with respect to the other models. As can be seen, you cannot expand the Build Plate Adhesion (it already shows the arrow downwards, so expanded):

    Ultimaker Cura with per model settings

    But, yes as of Cura 4.5.0 (see this answer) the "per model" settings have changed and the Build Plate Adhesion is added with the option to add a Brim Distance to trick Cura into de-attaching the brim (it will print a brim, but it is not attached to the part):

    Cura 4.8.0 per model settings example

    When applied to several models this could result in models with a brim attached and others without the brim attached:

    Example showing brim attached and detached

    By "_change the smaller model to include the brim_" you mean that I'd open the model in some kind of modelling software (Fusion360, Blendr, etc)?

    @LuxClaridge Yes exactly, there are already a few questions on that topic here.

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Content dated before 7/24/2021 11:53 AM