Jump to content

Recommended Posts

Posted · Extrudate calculation

Hello,

I’m doing some research on Cura with my Ultimaker2 momentarily on how it calculates the amount of extrudate, E-values.

I saw a topic on extrudable.me about how to calculate the difference between the expected volume and the extruded volume. http://www.extrudable.me/2013/11/03/slic3r-strange-defaults-causing-qu-bd-woes/

But if a do so the expected and extruded volumes don’t match up (see figure).

What am I doing wrong?

 

% extruded

 

The g-code is some lines from: UM2 - Extrusion Test - NoRet - 3-10mm3.gcode

With I belief a width of 0,4 mm (nozzle size) and a layer height of 0,25mm.

My formulas are in yellow.

Can anyone explain where the difference comes from?

 

  • Link to post
    Share on other sites

    Posted · Extrudate calculation

    There's a couple of things going on here. Firstly, UltiGcode E-coordinates are in cubic mm, not linear mm of filament fed in. Secondly, you're running the calculation on the first layer, which is only 0.2mm thick, not 0.25 like the rest of them.

    If you adjust for those things, that should get the numbers where they are supposed to be.

  • 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 5.9 stable released!
        Here comes Cura 5.9 and in this stable release we have lots of material and printer profiles for UltiMaker printers, including the newly released Sketch Sprint. Additionally, scarf seams have been introduced alongside even more print settings and improvements.  Check out the rest of this article to find out the details on all of that and more
          • Like
        • 5 replies
      • Introducing the UltiMaker Factor 4
        We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
          • Heart
          • Thanks
          • Like
        • 4 replies
    ×
    ×
    • Create New...