Jump to content

Support when using adaptive layers


12nh

Recommended Posts

Posted (edited) · Support when using adaptive layers

Weird support when using adaptive layers
Isn't this a specification?
(google translate)

Ultimaker Cura 4.12.1

224300.png

224510.png

224754.png

224953.png

Edited by 12nh
  • Link to post
    Share on other sites

    Posted · Support when using adaptive layers
    2 hours ago, Smithy said:

    Please post your messages in English, otherwise we cannot read and answer your topic. Thanks!

    I'm sorry I didn't confirm enough

  • Link to post
    Share on other sites

    Posted · Support when using adaptive layers

    The "Overhang Angle" is calculated according to line width and layer height.  It is the angle of a line running from the lower left corner to the upper right corner of the rectangle that portrays the area under the nozzle.  When the layer height is less, that angle is greater and when the layer height is greater then that angle is less.

    Since using adaptive layers causes the layer height to bounce up and down then the calculated "angle requiring support" changes.  When the layer height is uniform throughout a print, then the angle doesn't change.

     

    In the image below - the cartoon on the left shows two 0.2 x 0.4 rectangles just touching at their corners.  The theoretical maximum Support Angle is 63.4°.  If an actual model has an angle above 63.4° then the extrusion on top will absolutely not be in contact with the extrusion below and you are air printing.  When the layer height is lowered to 0.1 then the theoretical maximum increases to 76.0°.

     

    Now the actual question becomes "Is this the way it actually works in Cura" or is it just a "geometric/trigonometric anomaly" and my reply to that is - I have no idea.

     

    SupportAngle.thumb.jpg.bdb46925e1150c8ca43f6d1575c56a73.jpg

  • Link to post
    Share on other sites

    Posted · Support when using adaptive layers
    2 hours ago, GregValiant said:

    The "Overhang Angle" is calculated according to line width and layer height.  It is the angle of a line running from the lower left corner to the upper right corner of the rectangle that portrays the area under the nozzle.  When the layer height is less, that angle is greater and when the layer height is greater then that angle is less.

    Since using adaptive layers causes the layer height to bounce up and down then the calculated "angle requiring support" changes.  When the layer height is uniform throughout a print, then the angle doesn't change.

     

    In the image below - the cartoon on the left shows two 0.2 x 0.4 rectangles just touching at their corners.  The theoretical maximum Support Angle is 63.4°.  If an actual model has an angle above 63.4° then the extrusion on top will absolutely not be in contact with the extrusion below and you are air printing.  When the layer height is lowered to 0.1 then the theoretical maximum increases to 76.0°.

     

    Now the actual question becomes "Is this the way it actually works in Cura" or is it just a "geometric/trigonometric anomaly" and my reply to that is - I have no idea.

     

    SupportAngle.thumb.jpg.bdb46925e1150c8ca43f6d1575c56a73.jpg

    Thank you
    Isn't support generated above the set angle of "support Overhang Angle" even if "angle requiring support" changes?

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • Introducing Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
          • Like
        • 10 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...