Jump to content

Recommended Posts

Posted · Can Cura go stupid and double extrude?

I've been using Cura 3.6.0 with Octoprint and a Tevo Black Widow for a while now.  I spent a lot of time upgrading the printer and fine tuning nearly everything over a long period of time.  Eventually I achieved near perfect results under nearly all circumstances.  My rig is so reliable and versatile that I can't remember the last time I changed anything either hardware or firmware.

 

However, three days ago without warning, the print quality became horrible.  It looked like massive over extrusion, but to an extent that was so severe, that I suspected something else must be defective.  The print nozzle was plowing through the print to a degree I've never seen before.  My first guess was a Z axis fault.

I checked the obvious mechanical things like set screws, belt tension, etc.  I re-calibrated my Z axis and calibrated the Extruder as well........ all OK.

Thinking it might be a driver, I did some driver swapping between a spare, the extruder, the Z axis and the Y axis with no change to the problem. 

I experimented with some settings and discovered that I could make a good test print if I dialed the filament flow down to 50%.  What's up with that?  It made no sense. I started thinking how could my printer suddenly double the feed rate without warning and without having changed anything.  The fact that my extruder calibration was perfect added to the confusion.

 

A year ago I had what I thought was a driver overheating problem which, after a LOT of fiddling around, turned out to be a defective main board, so I ordered a new board and a fresh set of drivers just to be on the safe side.  I'd rather spend 50 bucks than spend another full day pulling my hair out chasing a mystery.

While waiting for the parts I re flashed the Marlin firmware............ no joy.

 

A few hours ago I upgraded to Cura 4.0 and now the printer is behaving perfectly, just like it used to do.  I'm partly happy, but not completely thrilled because I hate it when things go wrong without explanation and I also don't like it when the repair doesn't make sense.

 

I'm not sure Cura was at fault, but upgrading did in fact fix my problem.  How could the older version of Cura suddenly double the extrusion speed?  Or am I barking up the wrong tree?

 

S

  • Link to post
    Share on other sites

    Posted (edited) · Can Cura go stupid and double extrude?

    Hello @Mozella, if you use 2.85mm filament and, somehow, the old Cura thought it should be using 1.7mm filament, that would probably account for it. Just guessing, really.

    Edited by burtoogle
  • Link to post
    Share on other sites

    Posted · Can Cura go stupid and double extrude?

    I've never had anything other than 1.75 filament near this printer; nevertheless, it's something that crossed my mind so I checked the label as well as measuring the filament itself just to be sure.

  • 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...