Jump to content
UltiMaker Community of 3D Printing Experts

Retraction problem


davideromeo

Recommended Posts

Posted · Retraction problem

Hi,

I've been having various problems with retraction lately, especially with supports. Despite disabling "limiting retractions in the media", there is no retraction in the media, and it continues to produce stringing at every level. As you can see from the photo, the retraction doesn't seem to work in the upper parts of the print either.

I recently switched to Cura, and I probably must have done something wrong in the configuration.

Can you help me?

Thanks

P_20210926_171147.jpg

Body_2.3mf

  • Link to post
    Share on other sites

    Posted · Retraction problem

    "Max Comb Distance with No Retract" = 70.  That means no retraction until a travel move is over 70mm and your part isn't that big.  Try changing it to 2mm.  I counted 1760 moves in the Z in the gcode sliced with your 70, and 7000 Z moves when changing that setting to 2mm.  A Z move results from either a retraction, a prime, or when lifting to the next layer.  I didn't actually go through the gcode and count retractions.

     

    I don't like "Retract before outer wall" or "Retract at layer change".  The resultant primes always seem blobby with my Ender.  They have their uses but generally I avoid using either of those (or Z-hops) except in special circumstances.

  • Link to post
    Share on other sites

    Posted · Retraction problem

    Thanks for your advice, actually the problem has reduced quite a bit.

    In the photo you can see that there are some filaments left, which didn't actually cause any problems, removed with a lighter in seconds. I think increasing the retraction by a little should solve it, I don't want to lower the temperature too much. However, strange that in the Cura preview the shrinkage points in the media are not displayed.

    P_20210927_154902.jpg

  • 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...