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  1. #1

    Seams reduction on radii \ domes

    Hi All,

    any advice on reduction of predominant seam on outside of a dome \ half pokeball would be welcome.
    I am getting an ugly seam at the back and as the circle path decreases as the dome gets higher, the gap seems to widen in cura preview?.
    It matches what i am seeing printed.
    I am running cura 5.4 & using an ender 3 V2 to print one half of a pokeball for my grandchild. I am placing the dome \ pokeball largest radii down.

    Previewing the slice, the top of the dome seems to get wider on the gap (becomes green\yellow in pic) between lines. I am suspecting an algorithm error in the slice - as the circle decreases, the lines should remain same distance - they dont.

    Screenshot 2023-08-07 234045.jpg
    Is there a way to cure this or is it a well know issue.
    I cant understand why it produces a seam unless the movement within the program to next layer has a blip factored in.
    Can you slice a program to not have a white seam as in image?.
    I program CNC routers in industry for a living so have some background on graphi-code \ machine paths.

    thanks
    Rich

  2. #2
    Super Moderator
    Join Date
    May 2020
    Posts
    685
    Set the slicer to variable layer height, this should help but not eliminate the gap problem by making the layer height thinner where a curved surfaces occurs.

    The seam appears because of the layer change, there will be a setting to change this to variable positions rather than at the back. But then you might get zits instead.

  3. #3
    3D printing is not injection molding, if you want a smooth surface then there will always be post processing.. sanding, filling, painting.. Unlike molding you are adding a single string at a time, on layer at a time.. Curves and ramps and bevel's don't turn out the same as a mold, you have to model you part to be 3d printed for best results..

  4. #4
    Thanks for the replies.
    variable height has helped the reduction spacing.
    I found regarding the seam - that activating retract at layer change has massively reduced it.

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