Jump to content
UltiMaker Community of 3D Printing Experts

Cura 4.6.1 Not generating retractions at all?


Recommended Posts

Posted · Cura 4.6.1 Not generating retractions at all?

Hi all,


I've been banging my head against something, and I'm beginning to wonder if I'm going crazy. I cannot get Cura to generate gcode that includes retractions.


By way of background, I've been having significant problems with stringing for quite some time, I think since about the time I updated to 4.6 or 4.6.1. I made some changes to my printer (a Creality Ender 3 Pro) at that time, including changing to an all-metal hot-end and changing to a 0.6mm nozzle, which could both easily be causing worse stringing, so I have just been trying to tune with those, and having really, really inconsistent results. In the process of trying to see if I could modify the Change At Z post-processing script to add retraction distance and speed to make tuning a little easier, I started examining the gcode files Cura was generating to see how it was handling retractions (if it was using firmware retraction with G10/G11/M207 or if it was just using G1 with a negative E parameter) and I couldn't find any G10/G11/M207s, and I could only find a single negative E movement in ANY of my recent gcode files, and that one is generated by the starting Gcode for the printer.


I've tried searching for E-{retraction distance} in the Gcode files, and I've tried just searching for the retraction distance itself. I've tried setting the retraction distance to a very odd number (like 3.1415) that was unlikely to show up so I didn't get lost in finding other numbers, and it just doesn't show up more than the one time.


I've tried doing this with stringing tests that are just two towers. I've tried blowing up the towers to 500% of their original size to ensure that I wasn't running afoul of the retraction minimum travel amounts. I've uninstalled Cura and reinstalled it, leaving all settings at defaults and using a completely default Ender 3 Pro machine profile to ensure it wasn't something that I was changing. I've sliced multiple different models.


I cannot get Cura to generate gcode that includes retractions. Is anyone else experiencing this? I don't want to file a bug if it's something I'm doing, but if it's something I'm doing, I'm absolutely flummoxed as to what it might be.


I have attached a sample gcode files (Normal Size and 400%), along with the curaprofile (just Standard Quality, but I copied and exported it), the saved project file, and the STL. The only retraction I can find in either gcode file is on line 32 in both cases.


Can anyone else help me figure out what might be going on?

CE3PRO_Stringing_Test-Normal-Size.gcode CE3PRO_Stringing_Test.3mf CE3PRO_Stringing_Test-400-percent.gcode StandardQuality.curaprofile Stringing_Test.stl

  • Link to post
    Share on other sites

    Posted (edited) · Cura 4.6.1 Not generating retractions at all?

    Nevermind: Moderator - I figured it out, and you can feel free to remove my post, I can't figure out how. I realized my extruder is in absolute mode, so I don't have movements that are negative, they just go to lower positive values, and I do find places where that occurs.

    Edited by dnburrow
    • Like 1
    Link to post
    Share on other sites

    Posted · Cura 4.6.1 Not generating retractions at all?

    If you don't mind we'll leave this up in case anyone else has the exact same question.


    Note that in cura, in PREVIEW mode make sure moves are visible (checkbox) in "color scheme: line type"and there are 2 shades of blue.  Blue moves are non-extruding moves.  One shade is for retraction moves.  That's a really good way to tell which are which very quickly.  The rules for if a retraction happens is complicated so it's good that Cura shows you which are which.

    • Like 2
    Link to post
    Share on other sites

    Posted · Cura 4.6.1 Not generating retractions at all?

    Hi there,


    We've all been there at sometimes, -so this is great inspiration and information to go on!


    Way to go.


    Good decision.




    • Like 1
    Link to post
    Share on other sites

    Posted · Cura 4.6.1 Not generating retractions at all?

    I don't mind at all, just didn't want to clutter things up unnecessarily. If you think it's helpful for it to be here, please leave it up. Thank you, too, for the additional help!

  • 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
        • 31 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
        • 23 replies
    • Create New...