Jump to content
Ultimaker Community of 3D Printing Experts

Surface detection / Top layer problem

Recommended Posts

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


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:


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 well outdated, isnt it?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:


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:


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

Share this post

Link to post
Share on other sites

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


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

Share this post

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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 130 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!