Jump to content
Ultimaker Community of 3D Printing Experts

fundamental problem with cura (extrusion rate)


esopalumpa
 Share

Recommended Posts

Posted (edited) · fundamental problem with cura (extrusion rate)

On all 3D-printer I have worked so far (even the Ultimaker), the print-speed is not limited by the head-movement, but by the maximum amount of filament the hotend can meld.

As far as I can see there is no way to specify this in Cura (other slicers can do this).

So I have to do the math by hand every time I change settings.

This is annoying.

__________

Example for a printer that can meld about 4 mm³ PLA per second:

60 mm/s speed, 0.15 mm layer height, 0.35mm extrusion-width → 3.15 mm³/s | O.K.
first layer: 0,3 mm layer height, 30 mm/s speed, 150%  initial layer line width → 4.725 mm³/s | too much

I have to reduce first layer speed to 15 mm/s.

Edited by esopalumpa
  • Link to post
    Share on other sites

    Posted · fundamental problem with cura (extrusion rate)

    The formulas aren't complicated for a basic computation.  I suppose a plugin could be written with a dialog box to fill in the flow parameters and do the math in the background.  I use a simple spreadsheet and enter the parameters in a few cells and the answer shows up at the end (mm^3/sec or even E-steps/sec).  I suppose it could be considered doing it by hand because I'm using a keyboard.  That would be true of a dialog box as well.

  • Link to post
    Share on other sites

    Posted · fundamental problem with cura (extrusion rate)

    Withby hand” I meant, that it’s not done by Cura. 🙂

    As in nearly all cases, the amount of filament the hotend can deliver is the limiting factor to printspeed(s), Cura should be able to handle this.

  • Link to post
    Share on other sites

    Posted (edited) · fundamental problem with cura (extrusion rate)

    Interesting.  

     

    Does anyone know what the maximum volumetric flow rate is for an Ender 3 Pro with stock hot end?  I guess this would vary depending on nozzle size, material, printing temp … ?

    Edited by mkoic
  • 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

      • 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...