Jump to content
Ultimaker Community of 3D Printing Experts

top infill between versions


Recommended Posts

Posted (edited) · top infill between versions

I have a really strange problem that i am hoping someone can help with.

 

when using Cura 15.04.6 and PETG filament i get perfect top and bottom layers / infill. when i use the same stl file and temperature, flow, retraction etc settings in Cura 2.7 the top layers dont touch the perimeters and there are voids. 

 

I spent all of yesterday trying different extrusion multiplier. infill line width, infill wipe distance but none of these fixed the problem. 

 

I want to use the later version of cura for the improved support options including the support interface but if i cant get the top solid without voids i will have to stick with the older Cura and put up with less options for support.

 

Left square is from Cura 15.04.6 and right square is from Cura 2.7. 

20180211_131636.jpg

Edited by Andy2605
  • Link to post
    Share on other sites
    Posted · top infill between versions

    What??? The left one looks better, right?  Maybe zoom in more?  It sure looks like it is touching just fine here.

     

    Anyway if it's the same printer and filament then it has to be something in the gcodes.  So the main things are temperature, speed, layer height and line width.  

     

    speed

    Both curas have at least 3 printing speeds, cura 2 has more than 2.  You have to check *all* the printing speeds (infill speed, inner wall, outer wall) as any of these can affect the issue.

     

    line width

     Same with line width - check *all* the line widths in cura 2.  And in cura 15 is your nozzle size an exact multiple of the shell?  if not it kind of ignores your nozzle size.  So for example if nozzle size is 0.4 and shell is 1mm it will do two 0.5mm wide walls and all the infill will also be at 0.5mm wide.

     

    temperature

    Like speed, there are many temperatures.

     

    infill overlap

    Should be set to 15% in both curas.  Check that.

     

  • Link to post
    Share on other sites
    Posted · top infill between versions

    the left print is from 15.04.6 and the right is 2.7

     

    Printing speed was 40mm/s on both verisons

     

    the nozzle is 0.4mm

     

    walls are 1.2mm and top layer 0.8mm in both versions. 

     

    temperature was 230 degrees C on both prints. 

     

    infill overlap was 15% in both. 

     

    This is what is confusing me. Same printer and filament. all the settings that i can compare are set the same.

     

  • Link to post
    Share on other sites
    Posted · top infill between versions
    4 minutes ago, Andy2605 said:

    the left print is from 15.04.6 and the right is 2.7

    I made a correction comment in your original post.

     

    Is this the top layer?  Because if this is the bottom layer ALL my answers change dramatically.

     

    5 minutes ago, Andy2605 said:

    Printing speed was 40mm/s on both verisons

    Wait so you went through all 5 or so printing speed settings and set them all to the same value?

     

    Also what about layer height?  If it was .1mm for cura 15 and .15 for cura 2 that would explain everything because it's trying to squeeze more filament through the nozzle in a given second and more likely to underextrude.

     

    Basically what you are seeing here is probably underextrusion.  Although I'd like to see a better photo of both parts to be sure.

     

    8 minutes ago, Andy2605 said:

    walls are 1.2mm and top layer 0.8mm in both versions. 

    And line width?  Are all 5 or so line width settings set to 0.4 or the default 0.35?  And what was layer height?  Oh - how many layers does each slicer end up with?  Does cura 2 end up with more or fewer layers after slicing?  I'm wondering if the top layer is a partial layer.

  • Link to post
    Share on other sites
    Posted (edited) · top infill between versions

    This is the top layer. bottom layers are fine.

     

    The layer height of both prints is 0.2mm

    Initial layer was 0.25 in both versions

     

    Both files end up with 30 layers 

     

    I tried upping the overlap percentage to 25%. I have tried upping the extrusion multiplier to 105% 

     

    It has really got me baffled. I know i must be missing something somewhere. 

     

    Cura2.7.jpgCura 2.7

    Cura15.04.6.jpgCura 15.04.6

    image.png

    image.png

    image.png

    image.png

    Edited by Andy2605
  • 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

      • Talking additive | The 3D printing podcast
        Why should we be the only ones asking questions? Join us and ask Jabil all your questions on September 22nd 5pm CET
          • Like
        • 3 replies
      • Ultimaker masterclass: Optimizing your Ultimaker Cura workflow
        Save your seat for either broadcast on September 23.
        What will you learn?
        · Best practices for iterative print preparation and every lesson you should learn from each print
        · The right way to use per-object settings and when they are most useful
        · Easy-to-use resources for anyone who wants to develop their own printer definitions, plugins, or print profiles
        · How to optimize print profile settings and whether to “keep” or “discard” changes
        · When is the right time to export your drawing from CAD? (Based on Ultimaker Cura’s surprising power as 3D control software)
        · And a whole lot more tips and tricks!
         
        How can I join?
        This free masterclass will take place twice:
        1. 11am CEST (5pm SGT, 5am EDT)
        2. 5pm CEST (11am EDT, 8am PDT, 11pm SGT)
          • Like
        • 0 replies
      • Do you use 3D printing at work? Let us know
        It doesn't matter if you are using 1 Ultimaker or 10, there is inspiration in everything. We're looking for ...
        • 1 reply
    ×
    ×
    • Create New...