Jump to content

Cura bug? Extruder skip from infill going over and over itself multiple times

Recommended Posts

Posted · Cura bug? Extruder skip from infill going over and over itself multiple times

I'm running into an issue with my Ender 3 having extruder skipping.


I've had extruder skipping before but only on the first layer due to leveling the bed to close to the nozzle.


However I'm getting this issue later on in the print. A good few layers later, in the same place each time. So its not bed level related. 

In this example I'm printing something like a thread bobbin, like a cylinder. So nothing crazy.


And its only happening during certain parts of a certain print.


I was printing with this exact same setup just a few days, and have been printing this way for years with no issue. 


Petg 225'c

50mms (I turned down the speed mid print to 20% but it still skips, so not speed related)

It's not during the first layer, so bed spacing is fine.

Nozzle isn't clogged

Bowden is secure

Extruder gear is fine.

Filament is fine and not chewed up.

Spool rotates freely it's on a ball bearing mount

I tried turning down flow rate to 80% mid print on the parts its skipping on and it continues to skip but less frequently.

It does it on both cura 5.2 and 5.3.1

THE PROBLEM: As you can see from the G-code in cura / the video below. It prints the first 4 layers no issue. The skipping issue starts on layer 5, the outer walls and inner walls print fine, then there are these thin bits of infil which are spaced slightly inwards from the wall. And as you can see the nozzle goes over and over the same spot multiple times, and this is where the extruder starts skipping. Which is why I think its blocking the nozzle and causing extruder skipping. The issue then stops and prints the green/red lines fine, and then restarts again on layer 6 when it goes to the infill part again.

Heres the video, look at the orange lines (infil)

 The gcode is attached if you want to look at it yourself.

I've tried other infil patterns and a similar thing is happening, the inner infil goes over themselves multiple times.



  • 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 5.3 stable released
        In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
          • Thanks
          • Like
        • 56 replies
      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.

        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 18 replies
      • UltiMaker Cura Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 29 replies
    • Create New...