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Support printing problems


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Posted · Support printing problems

I have an issue with printing support, at least support structures on the inner side of an object.
The model is printed flawlessly until the support starts to be printed, then it becomes a mess.
This lasts as long as the support structure is being printed, and the stray filaments frequently reach above the ceiling of the support roof (the gap), ruining the bottom of the supported structure.
As soon as the support is finished, the mess stops.
It looks like that the filament keeps flowing during the movements of the printhead.
This behaviour doesn't seem to depend on the material type used : ABS and different ASA brands produce the same phenomenon.
The printer, an UMS5, has firmware 8.2.0.0 installed.
The slicer is Cura 5.8.1
The profile used is plain 'balanced 0.15 mm' with a few changes in the support settings:
-support wall line count = 1
-support roof wall line count = 2
-support density = 60%
(those settings are set to try to mitigate the mess, but don't have any effect on it).

Q.: how can I avoid this? suggestions...?

 

20241002_202543B.jpg

OuterBearing.3mf UMS5_OuterBearing.ufp

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    Posted · Support printing problems

    Howdy!

     

    If you could provide the Cura project file that would help (your 3mf only contains the model). Get it set up then go to File > Save Project (some people get this mixed up with Export) since a project file will include your printer and print settings.

     

    Looking at the gcode from the UFP file it looks like it's meant to print about as messed up as your end result is:

    image.thumb.png.1917667c09eef6a9419c2bd85cd2fd94.png

    That's actually pretty impressive, I couldn't get it that messed up if I tried 😄 But also why the project file is important so we can try and figure out how it gets like that.

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    • Solution
    Posted · Support printing problems

    Disable Special Modes > Arc Welder.

    UltiMaker printers don't need it anyway because their motion planners look several moves ahead and can figure out a curve by themselves. I have no idea why it would mess up the slice that but when I disabled that and sliced it again and loaded the ufp file for the gcode preview, it looked fine (unlike the donut from hell pictured above).

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    Posted · Support printing problems

    Thank you.

    I learned that "preview" is not necessarily what is sent to the printer, but add-ons might "improve" the slicing result...

    and how you can check what is sent to the printer.

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    Posted · Support printing problems

    I was probably too fast and too optimistic.

    I printed it again, after uninstalling the add-on and after verifying that the ufp didn't show any stray filaments.

    This is the result (i made a picture of the other side):

    A lot of filaments in the wild, at two places:  the top and the bottom of the support, nowhere else.

     

    20241004_212007.jpg

    UMS5_OuterBearing.ufp UMS5_OuterBearing4.3mf

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    Posted (edited) · Support printing problems

    Hi @RolandDM,

     

    I've tried to open your "project" file, but there was just a 3MF file without your printer settings.

    Try to save the settings when you have sliced the object, -in order to have the needed data saved into the 3MF file.

    By the way, what kind of filament material are used in "between" here?

    Hmm, when I uploaded the second 3MF file I've got the project file..

     

    Thanks

    Torgeir

     

    Edited by Torgeir
    Correction.
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    Posted · Support printing problems

    Hi @RolandDM.

     

    I've been looking at your, settings using ASA and PLA as support. As there is no configuration files for ASA, -and PLA are a little far from ASA print temperature (that's around 245 deg C). .. 

    The PLA seems not to stick well to ASA filament (brands used).

    I'll think it will be better to use tree support (attached in the center of the object at bed) and using ASA for support as well.

     

    Good Luck

    Torgeir

     

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    Posted · Support printing problems

    @Torgeir I sort of twisted UltiMaker's arm into producing some ASA profiles for @RolandDM by hacking my own so they posted better ones 🙂

     

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