Jump to content

Recommended Posts

Posted · Extruder stopping and grinding ?

Extruder stopping and grinding ?

I have a new interesting problem with my new ultimaker.

I am running slow good quality prints at 70 speed.

The prints run at a temp of 215 for PLA and no problems.

about 20minutes into each print, the PLA filament stops rolling into the print head and the extruder keeps on turning. This of course bores out a huge whole in the PLA and there is no other option than to top the print, open the extruder and pull the pla out with a pliers and cut it away.

I have lost about 5 meters of good PLA now and i dont really want to loose more...

these are my few ideas why this could be happening ?

(1) the bowden tube is too small, it is tight and if the diameter of the pla varies, that could cause a blockage and so the grinding.

(2) im running to close to the print bed, the pla has not enough chance to escape onto the bed and so causes a back log, resulting in the grinding.

here are some photos to help understand the situation.

please help if you can.

thanks.

Ian

  • Link to post
    Share on other sites

    Posted · Extruder stopping and grinding ?
    photo4.jpg
  • Link to post
    Share on other sites

    Posted · Extruder stopping and grinding ?

    4th attempt ruined.....

    cleaned the extruder... printed the same model again. this time half the project printed fine, then no more filament and pufff. dead

    any ideas guys ?

    thanks.

    Ian :D

  • Link to post
    Share on other sites

    Posted · Extruder stopping and grinding ?

    I don't consider 70 slow :)

    I've not had this problem, but a lot of people do when using the stock drive mechanism. It is very intolerant to changes in the diameter of the filament. You could try backing off the tension screw on the drive a whisker, but then you might get slippage if the filament has a thin spot. If you are watching a print and notice the grinding you could try to adjust it on the fly and add a little manual extrusion help to get it past the point of grinding.

    Long term your best bet is to produce an alternate drive. There are a number on thingiverse, and posted here. Bertho and chopmeister both have one. Their designs are much more tolerant of filament change due to a bearing and spring mechanism.

  • Link to post
    Share on other sites

    Posted · Extruder stopping and grinding ?

    thanks for the tips.

    i will have a goodlook at the other options for the extruder setup tonight.

    I would be very curious to see what other members here have used and there feedback on what works and doesnt ?

    best wishes.

    Ian

  • Link to post
    Share on other sites

    Posted · Extruder stopping and grinding ?

    For me it has been a case of just not over tightening the adjustment bolt on the stock

    feeder. I've perhaps been lucky with the quality of the filament I got when I bought the UM, and have not bought any more since.

    I do intend to build one of the others at some point though

  • 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...