Jump to content
UltiMaker Community of 3D Printing Experts

UM3, Blackmagic conductive material grinding.


Recommended Posts

Posted · UM3, Blackmagic conductive material grinding.


I am trying to dual print on a UM3 with the second material being Blackmagic3D's conductive graphene filament (3mm). My prints will dual extrude properly about half way though the print then the graphene will suddenly stop extruding, no splurting or reduced flow, it just stops. This tells me that it is clogging in the nozzle. When it does, the feed grinds the filament to nothing.

I have tried increasing the temperature a small amount (225c from 220c recommended printing temp) with a little improvement. I am not sure how high I can take this filament and I don't currently have enough to do 10 test prints, can anyone make any recommendations?

Also, my UM3 is stock, with 0.4mm tips. Blackmagic3D recommends 0.5mm tips, but I am unsure what is involved in changing the tip sizes. Does it require changing settings in Cura, buying a new print core, or is it as simple as swapping the nozzles?


  • Link to post
    Share on other sites

    Posted · UM3, Blackmagic conductive material grinding.

    Standard Cores don't allow the user to swap the nozzles. You could buy a 3dsolex unofficial core that allows different nozzle sizes. Or you could buy a precision 0.5 drill bit and make the nozzle hole bigger. After doing a or b to adjust the nozzle size on Cura you can do it on the advanced mode changing the line width (unhidde also the other sub options that cura hides by default).

    Ofc maybe it isn't a clog, and just the feeder that grinds the filament to the point of not being able to push it. You might want to try to relax the spring tension (it has a screw on the top that moves the lever indicator up/down, up is relaxed, down is more tension). That and printing with less retractions might be enough to keep printing.

    On the long term if that's your main material I would seriously consider using a better feeder like a @bondtech

    I don't know if @bondtech has developed any tool to make easier for the um3 users to upgrade? Atm changing the feeder requires the user to use ssh (to access the machine remotely) and a bit of knowhow to edit the firmware files.

  • Link to post
    Share on other sites

    Posted · UM3, Blackmagic conductive material grinding.

    I think all @neotko advice is right, but not necessary to the 3D Solex upgrade; here is what I think is your problem:

    The bowden tube in combination with your filament. Please, take part of the filament which you have already run through the feeder, ie tied to print with and manually run it through the bowden.

    Like this:

    1) turn off printer

    2) Lift the "filament release" on feeder (this is quite hard!)

    3) Pull out all filament while holding this release knob

    4) remove bowden clips back and front

    5) push insert holding bowden down, and while holding down pull out bowden

    6) manually push filament which you already tried to print (very important, to diagnose what neotko says about filament grinding and more...)- through the tube.

    Should go light.

    7) report back, and we will help you!

    To put back bowden, insert and make sure it is in very bottom, there may be some "edges" to overcome.

    , while holding bowden down, lift insert with a blunt knife and insert clip.

    Insert filament while lifting knob on feeder and feed it manually all the way to the front.

  • Link to post
    Share on other sites

    Posted (edited) · UM3, Blackmagic conductive material grinding.

    I see the filament that you are using is 3.00mm. UM3 is designed for 2.85mm filament.


    This might explain your grinding problems.

    Have you checked whether or not the filament is abrasive? Beware that there is a brass nozzle in your print cores. It will quickly wear out. Wear resistant print cores are not (yet?) available.

    Edited by Guest
  • Link to post
    Share on other sites

    Posted · UM3, Blackmagic conductive material grinding.

    Wear resistant print cores are not (yet?) available.


    hmmm, actually they are, in the hardcore nozzle, just steel for now unfortunately, but it's there....


    I would love an original ultimaker/3dverkstan ruby core though.....

  • 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
        • 26 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...