Jump to content

Recommended Posts

Posted · No extrusion when starting print

This post is with regards to my new Ultimaker 2 which I received less than a week ago.

I've already posted this morning regarding a problem but thought I should keep this separate as it is a different problem.

Every time I switch on to try to print the print begins but no material is extruded. If left then material does eventually extrude half way through the print (resulting in a useless ball of material).

What I usually do is abort the print and then heat the extruded head up to 260 and then feed some material through to get it started.

Am I doing something wrong here or is my machine faulty?

Surely I am not expected to do this every time?

I must say that with this being the second problem with my Ultimaker 2 immediately after removing it from the box I am pretty disappointed so far.

  • Link to post
    Share on other sites

    Posted · No extrusion when starting print

    Sometimes the PLA drains out if the nozzle is hot but not printing (like from the end of your last print).

    I found that making a simple change to the start.gcode (found from Cura in the Start/End-GCode tab) to make more filament extrude in the beginning, here is the new portion of code (commented old line, newline added below):

    ;G1 F200 E3 ;extrude 3mm of feed stock

    G1 E14 F300 ;14mm at 300mm/s

     

  • Link to post
    Share on other sites

    Posted · No extrusion when starting print

    Changing the start gcode won't help for the UM2, in its default mode as the start/end gcode is implemented on the printer itself, whereas its configurable for the UM1.

    However, as Anthony says, plastic can tend to ooze from the head if it's sat with the nozzle hot, so that when the print starts, it doesn't always extrude at first, until the nozzle has refilled with plastic.

    Have you updated to the latest firmware? (As shipped with last week's release of Cura 13.12?) There's a bug in that that causes excessive retraction at the filament after you abort a print. Could that be the problem? For now the preheat and manually advance option is the best fix, but hopefully they will have a fix for that very soon.

    Don't give up hope! These are new machines, and there are still some teething problems. But UM is working hard to fix them, and there are a lot of folks on here who can help with any issues you run into. The results from the printer can be stunning, so don't get downhearted - you picked a great printer, and it will give you some great results.

     

  • Link to post
    Share on other sites

    Posted · No extrusion when starting print

    260C is dangerously hot for PLA. If you let it sit long at that temp it is likely to boil and turn to gunk and clog your tip. This temp is okay when you are printing fast though e.g. 200mm/sec .1mm layers or 100mm/sec .2mm layers.

    If I'm not in a rush I print at temps between 190C and 220C.

     

  • 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

      • Help Us Improve Cura – Join the Ultimaker Research Program
        🚀 Help Shape the Future of Cura and Digital Factory – Join Our Power User Research Program!
        We’re looking for active users of Cura and Digital Factory — across professional and educational use cases — to help us improve the next generation of our tools.
        Our Power User Research Program kicks off with a quick 15-minute interview to learn about your setup and workflows. If selected, you’ll be invited into a small group of users who get early access to features and help us shape the future of 3D printing software.

        🧪 What to Expect:
        A short 15-minute kickoff interview to help us get to know you If selected, bi-monthly research sessions (15–30 minutes) where we’ll test features, review workflows, or gather feedback Occasional invites to try out early prototypes or vote on upcoming improvements
        🎁 What You’ll Get:
         
        Selected participants receive a free 1-year Studio or Classroom license Early access to new features and tools A direct voice in what we build next
        👉 Interested? Please fill out this quick form
        Your feedback helps us make Cura Cloud more powerful, more intuitive, and more aligned with how you actually print and manage your workflow.
        Thanks for being part of the community,

        — The Ultimaker Software Team
        • 0 replies
      • Cura 5.10 stable released!
        The full stable release of Cura 5.10 has arrived, and it brings support for the new Ultimaker S8, as well as new materials and profiles for previously supported UltiMaker printers. Additionally, you can now control your models in Cura using a 3D SpaceMouse and more!
          • Like
        • 18 replies
    ×
    ×
    • Create New...