Jump to content

Question on print bed size settings


Recommended Posts

Posted · Question on print bed size settings

Greetings all,


I have an Ender 3 that I just upgraded to 300mm x 300mm with an ender xtender kit.  I went into machine settings and I adjusted the X and Y size settings to reflect the new size, but when I go to use Cura (4.7 ATM), it gives me 2 areas in which I cannot put any objects into without it saying that the object will not fit (see attached pic).  Is there a setting that I have missed, or will I need to create a new profile using a Custom FFF printer.


Thank you for your help


  • Link to post
    Share on other sites

    Posted · Question on print bed size settings

    I think this is what you need to do.

    Cura uses two machine definition files.  They should be in a folder that looks a lot like this:

    C:\Program Files\Ultimaker Cura 4.6\resources\definitions\

    One file is "creality_base.def.json" and the second is "creality_ender3.def.json"


    They are text files and will open in Notepad.  Within the Ender 3 definition file there might be an area like this (the numbers shown are for my E3Pro):

    Within the section  "overrides" find...

    "machine_disallowed_areas": {
                "default_value": [
                  [[-117.5, 117.5], [-117.5, 108], [117.5, 108], [117.5, 117.5]],
                  [[-117.5, -108], [-117.5, -117.5], [117.5, -117.5], [117.5, -108]]


    If it looked like the one below you would have a 10mm border around the 300mm build plate.  Don't quote me on that.  All I know about Python is that "if there are spaces, there are supposed to be spaces".

                   [[-150, 150], [-150, 140], [150, 140], [150, 150]],
                   [[-150, -140], [-150, -150], [150, -150], [150, -140]]

    Be careful and remember, if your printer blows up it wasn't my fault.  Make a backup copy of the file before you start changing anything.  When you restart Cura it should read the new numbers from the file.  I think.  Maybe.




  • 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

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 6 replies
    • Create New...