Jump to content
UltiMaker Community of 3D Printing Experts

Ultimaker 2: Nozzle dragging through prints and squahing models.


MGFRD

Recommended Posts

Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

We have had various successful prints using our printer, but now we are having issues with the nozzle dragging through printed material and squashing prints. Weve adjusted the build plate height and levelled it several times, but we are still encountering problems.

Any suggestions would be massively appreciated?

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    A photo or video would be helpful. There are 3 possible issues you are describing each totally different.

    First realize that leveling only affects the first layer. by the time you get to the 3rd layer all leveling has been self repaired by the fact that each layer sits on the previous and eventually they get to the right position. This is easier to show in pictures than words.

    Is your problem top and bottom layers only? If so try turning off the "combing" feature - that will make a huge difference. And make sure retractions are enabled. Please post picture.

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    Please see the attached photo.

    This model was the 1st of an array of bad prints and seemed that the nozzle was dragging through previous layers which caused the model to spread out.

    Now it seems that that no were near enough material is being extruded through the nozzle for it to print at all, potentially a feeder issue?

    5a3313b6acc3c_PinDeformed.thumb.jpg.5ffe9bb490ea736f967257e260596bce.jpg

    5a3313b6acc3c_PinDeformed.thumb.jpg.5ffe9bb490ea736f967257e260596bce.jpg

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    I guessing this is quite small. Nothing to compare the size to.

    But what you are experiencing is the print is getting to hot.

    When you have a large print, as the nozzle moves around the fans blow on the whole print and it take quite a while to the hot nozzle to reach an area where is has previously been. This allows the plastic to cool and go hard enough to not be effected by more hot plastic being up on top.

    Small objects don't get this chance to cool and end up getting hotter and hotter till you have a blobby mess.

    To fix this try printing 2 at once. this means as one is printing the other is cooling and if you have them side by side the fans with blow on one while printing the other.

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    You may need to do an atomic pull to clean the nozzle. but there is a lot of information about extrusion issues in the support section.

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    What labern said. I assume this is the width of a pencil. Print 2 at once and make sure you have "all at once" mode and not "one at a time mode" chosen in the menu.

  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    do you mean something like this?:

    it starts around 0.30 and when it gets to 1.00 the over extrusion is really visible when the nozzle is dragging through the pla.

    I have no idea what is is, the funny thing is that when I restart the file it could be good or bad again.

    (printed with a brand-new Ultimaker2Go, right out of the box)

     

  • Link to post
    Share on other sites

    Posted (edited) · Ultimaker 2: Nozzle dragging through prints and squahing models.

    Damn it I should NEVER answer any question without a photo or video first.

    The problem is the part is not cooling enough - the head is keeping the part warm.

    The only reasonable solution is to print two "pencils" side by side so one has 3 seconds to cool while it prints the other.  This will make a HUGE difference.

    Edited by Guest
  • Link to post
    Share on other sites

    Posted · Ultimaker 2: Nozzle dragging through prints and squahing models.

    Also you could turn the fans at 50-70% propably since layer 1 since you use bluetape because no heated bed. Don't go 100% at the start to avoid cooling too much too fast the hotend.

  • 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
        • 24 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
        • 22 replies
    ×
    ×
    • Create New...