Jump to content
Ultimaker Community of 3D Printing Experts

Final layers being flattened (UM3)

Recommended Posts

Posted · Final layers being flattened (UM3)

I am having issues with my UM3 where the final layers of a model are being flattened, distorting the final print. The print looks really good up the first few layers, and then the outer wall layers have large flattened circles, presumably from the extruder. I've manually leveled it multiple times, but it still seems to do this. The finer the layer height I use, the worse the effect seems to be.


Here's an image of a recent print, PLA + PVA for support with 0.04mm layer height.

* Combing is on all

* Retraction is enabled: enabled at at layer change, before outer wall

* Avoid printed parts and supports while traveling is enabled

* Z hop while retracted is enabled, only over printed parts


Any advice on how to prevent this?


  • Link to post
    Share on other sites

    Posted · Final layers being flattened (UM3)

    This is a common problem when it's the very very last few layers but you have so many layers to go when doing the girl's face.  I would check that the fans are working.  And maybe lower the air temperature.  You want 100% fan with PLA.  Not the bottom layer but by the 5th layer the fans should be at 100% to cool the layer below before the next layer.


    In addition I would print this "vertical" because you will get much better resolution on the girl's face if you print in the other orientation.


    But if you print this vertical it looks like she has a pony tail printed last and that might have the same issue unless you also print a tower next to her for cooling purposes - when it prints the tower the model can cool for an extra 4 or so seconds (that's all it usually needs).


    It's also possible the temperature is off on your core so you could try another AA 0.4 core.


    But first and foremost check that the fan is working - what I see here is what I would expect if one or both of the 2 side fans were broken.

  • 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

      • New here? Get ahead with a free onboarding course
        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
        • 13 replies
    • Create New...