Jump to content
Ultimaker Community of 3D Printing Experts

Surface detection / Top layer problem


duisenberg
 Share

Recommended Posts

Posted (edited) · Surface detection / Top layer problem

Recently I printed a plate with Cura2.3.1 and ran into something strange:

60a787a5ba8b41b515f8feee68584788.jpg

The main print settings are 0.04 layer, 0.8 shell with 0.4 nozzle, 0.4 top/bottom, 25% infill. The printer is no UM, its a clone with prusa kinematics running marlin firmware.

The print started well, but the intermediate layer is messed up and top layer as well. Quite similar to the otherwise mentiones "pillow" effect, so at first I thought I bummerd with some of the 2.3.1 settings. So I started 15.04 and got this:

d2e7002b7c39f5d4e2b7f88077fc9e65.jpg

I tried with all reasonable settings, thicker top/bottom but the effect always stays the same - the top layer is not recognized, its just the infill and the print will have the same issue as with 2.3.1

Then I remembered there came a Cura 14.07 from the Chinese Company DGO on SD card. I never tried that one because ... well outdated, isnt it? But ok - installing it costs a minute, settings set and got this:

1c7ab661822ec73a05bcfd81036863ed.jpg

The top layer is looking as it shall look, also the last black layer, the shell is well connected and going down it shows all 10 top layers looking like the last one. I am quite sure it will come out without any pillow-like effect since the layer representation always reflected the print quite accurate.

So the big question here is what is the DGO version of Cura14 doing different and why does it detect the top layers correctly where Cura15 as well as Cura2.3.1 bummer.

If the STL helps - I know its quite a stupid logo, but seems to hit the issue quite well - here it is:

LogoPlate

My guess ist that with 15 somewhere a flaw has been picked up that prevented the correct recognition of top layers. It seems that in 15 switching from Combine A to Combine B (which wont work with the model at all) at least seems to detect the base top layer (the last black one) correct but then thinks the top layer thingy is done. Or maybe the DGO guys ironed something out, I didnt test a generic 14.07.

Edited by Guest
  • Link to post
    Share on other sites

    Posted · Surface detection / Top layer problem

    asdffsdf.thumb.PNG.c4a37fa23014437136642f4d5ccc02c8.PNG

    This is from 2.3 with default PLA settings, 0.4 nozzle, normal quality. Looks normal to me?

    Also, just a general comment. Printing this thing with 0.04mm layers is huge overkill IMHO and only wastes a ton of time for very little gain in quality.

    asdffsdf.thumb.PNG.c4a37fa23014437136642f4d5ccc02c8.PNG

  • Link to post
    Share on other sites

    Posted (edited) · Surface detection / Top layer problem

    Yep, long print. Intentionally, not mutually. Not for the sake of the model but for testing the material at thin layer printout.

    80c9f2794977b4ed182a76461aba37f5.jpg

    This is how the model came out with the DGO cura. To lazy to swap colors. Still not really done since I forgot to set infill from 20 to 25% but quite noticeable difference.

    In 2.3 layer view the missing top layers indeed are displayed. But well, what came out then doesnt look like having a top layer on the letters. Maybe not that wysiwyg as one should assume.

    There are ways to manually, by plugin or by settings work around the issues, sure, less speed, more flow.

    But maybe there also is some kind of flaw in the slicer that calculates some percent to few flow and to few bridges for small layers, round down issue or conversion,  such a thing, currently my best guess.

    Hmm, the dropfiles expire too fast. Sorry, need to look for another space to up them.

    Edited by Guest
  • 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
     Share

    • Our picks

      • Ultimaker showcase | April 2022 | 4pm CEST | 10am EDT
        I'm excited because I've personally produced this showcase event, so if you are curious what else I'm up to nowadays, come check it out and say hi in the chat! It would mean a lot! 
          • Thanks
          • Like
        • 4 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 11 replies
    ×
    ×
    • Create New...