Jump to content
Ultimaker Community of 3D Printing Experts

Fine tuning line width for small rectangular pyramids


Recommended Posts

Posted · Fine tuning line width for small rectangular pyramids

This thread is related to my nylon printing 'adventure'.  The part of the print I am struggling with is an upward facing gear-toothed circle.  It looks like the print is suffering from severe overextrusion and the nozzle is dragging material out to the perimeter.  Replaying the layer view in Cura, I am starting to wonder if the line width required for these gear teeth is narrower than I have set.


I'm using a 0.4 nozzle currently, have adaptive layers in use per a suggestion here and that has improved things somewhat.  Base layer height is set at .05 and width at 0.4.  When I look at how it tries to print that, I can imagine why there is excess filament.  When I increase line width to 0.45, it looks better in Cura.  I imagine it will slightly underextrude and that might offset whatever is going on.


Of course, if underextrusion is what I am doing, I would rather not do that do the rest of my print.  Can I set up a line width change to start at a specific layer?


Thanks once again...


  • Link to post
    Share on other sites

    Posted · Fine tuning line width for small rectangular pyramids

    Could you post images (screendumps) of the design in Cura, and photos of the results? The photos with ruler, so we can see the dimensions.


    I haven't printed with nylon yet, but there could be other things involved, such as insufficient cooling in a tiny model, so the model can't solidify. Or overextrusion due to slowing down in corners, when the internal pressure can't immediately be released, etc.


    For PLA, printing slow and cool usually helps. And printing a dummy tower next to very small prints, so the nozzle is away from the model, allowing it to cool, and so that printing-time per layer is equal for all layers.


    As said, this works for PLA and PET. But I don't know if it also applies to nylon (if too cool, you get poor layer bonding).


    But of course, it could be something else too.


    Below: a few images of the dummies: the basic concept, and a real model.






    • Thanks 1
    Link to post
    Share on other sites

    Posted · Fine tuning line width for small rectangular pyramids

    Thank you.  Your comment about slowing down in corners resonates - these are small teeth and corners are exactly where things are getting messy. 


    I'll try to explore ways to change how that path is laid down.   If it was CNC I would know how to change that toolpath, but I don't have that skill or knowledge (yet) here.  Fortunately, there are some smart people to ask here ?


    For a dummy tower, is that simply a matter of creating a separate STL and importing it to Cura, or can I do that within Cura itself?


    Thanks again!

  • 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
        • 11 replies
    • Create New...