Jump to content

Controlling subtractive CNC from Cura, at all possible?

Recommended Posts

Posted (edited) · Controlling subtractive CNC from Cura, at all possible?

I've been investigating CNC mill/router design (so I'd be free to have it work with GRBL or perhas even use Marlin or other common gcode interepreters) for a possible project. But all attempts to find good gcode path generators for woking from initially mesh modelled parts (stl/dae/obj files) have been failures. But I've used Cura on lots of additive 3D printers and it works really very well indeed.


Is it at all feasible to get Cura to work with settings where it would run "backwards" around an outline of a part, the same way it does perimeters but following the outside of the perimter rather than the inside? It would give 2.5D milling as it would mill a 2D cut at any height, then move down to make the next cut and so on, not true 3D, but it could be really useful.


Are there ways to get Cura to only ever move the "print" head such that it stays outside the boundaries of a model (or inside the boundaries of a negative mould object), and ways to get Cura to make rather large raises of the "print" head, a sort of z-hop, this may infact take a negative direction, during moves between say separately cut holes where one would need the cutting bit to be lifted out of the material block to translate on x and y before lowering down on Z again.


Has anyone tried this at any point?


Thank you

Edited by r111122223333
  • Link to post
    Share on other sites

    Posted · Controlling subtractive CNC from Cura, at all possible?

    Provided the meat is very tender, you can use a spoon to divide a steak into bite-size chunks. But a knife will always work better.


    You could write all kinds of hacks to get Cura to make toolpaths for subtractive CNC. But Cura is really made for 3d printing (and actually specifically for FDM 3d printing). There are other tool far more suitable for subtractive CNC.

    • Like 1
    Link to post
    Share on other sites

    Posted · Controlling subtractive CNC from Cura, at all possible?

    Yeah, I really wouldn't use Cura for this. You would spent more time fighting it than anything else. Any subtractive C&C tool will likely be a much better option.

  • 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
        • 56 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
        • 29 replies
    • Create New...