Jump to content

Under Extrusion Help


PatrickM

Recommended Posts

Posted · Under Extrusion Help

I've asked this before and have got no useful help. How do I fix under extrusion? I've tried every method that the troubleshooting guide has to offer, and I've replaced all parts of my hot end. What is my printer's problem? I print PLA at 210 degrees on Ultimaker 2.

  • Link to post
    Share on other sites

    Posted · Under Extrusion Help

    Hi, Patrick,

    Have you replaced the bowden tube recently? You can experience wear and tear with it over time, or have debris like ground up filament work it's way into it, causing the filament not to move smoothly.

    The first place to look at if all the hardware is good would be your settings in Cura to determine your volumetric extrusion rate. You calculate this by using your nozzle width X layer height X print speed to get your extrusion rate in mm^3/second.

    8mm^3/s running PLA at 230 C is considered a pretty healthy extrusion rate for this test. You can download the gcode here, which will automatically set the temperature 230 for this print: https://www.youmagine.com/designs/test-print-for-ultimaker--2

    This should give a baseline for how much under extrusion you're seeing, or whether the issue may be related to the gcode.

    If you're towards the end of a filament reel and it's very tightly wound, you might also start to see some under extrusion because the printer is having to work harder to unwind it and get it through the bowden tube.

    You mentioned replacing parts of the hot end--is your fan shroud touching the nozzle? If it is, it will act as a heat sink, and can cause under extrusion.

  • 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

      • 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
          • Like
        • 2 replies
      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
         
          • Like
        • 26 replies
    ×
    ×
    • Create New...