Jump to content
UltiMaker Community of 3D Printing Experts

Extruder going backwards!!

Recommended Posts

Posted · Extruder going backwards!!

Hi Guys,

I am new her so please be gentle with me. I built my UM 1 yesterday and my Extruder motor only seems to extrude in one direction, backwards. its drawing the filament out of the tube instead of driving it towards the hot end.

Has anyone ever had this problem before. I have tried every thing to fix this but with no joy.

Any help would be great.

Thanks fellas,

Andy out.........for now.


  • Link to post
    Share on other sites

    Posted · Extruder going backwards!!

    I've seen a couple of people that have had a problem where the leads were inserted in the wrong order on the connector. I took a quick, terrible photo of my connector. It's an old machine but I assume it's still the same on the new ones.


    Switching the leads around isn't too terribly difficult. If you look at the opposite side of the one shown in this photo you will see some metal through openings in the case. Use a needle or some other sharp tool and carefully press on these metal tabs while tugging on the corresponding lead. They should pop out without too much resistance. Then simply put them back in the correct order. If they refuse to stay in the connector all you have to do is bend the little barbs (that you pressed down on with the tool) back into shape.


  • Link to post
    Share on other sites

    Posted · Extruder going backwards!!

    The easiest fix is to swap two wires in that cable Robert showed you. The connector may be correct yet the motor wired wrong. There are 2 pairs of wires. Each pair goes to a coil in the stepper. You can swap the two wires in either pair but don't swap the wires in one pair for the wires with another. So swap the green/black pair *or* the red/blue pair.

    Another solution is to go here and build the default ultimaker configuration but swap the checkbox for the extruder direction (uncheck "invert axis"):



    The problem with this solution is that Cura comes with updates to Marlin occasionally and you have to keep rebuilding your own custom copy of Marlin.


  • Link to post
    Share on other sites

    Posted · Extruder going backwards!!

    Glad it works, was curious what the problem was after you left chat ;)


  • 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
        • 21 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...