The Blackstone Cube: Large Scale 3D Printer

Giant 500x500x600mm CoreXY 3D printer proof-of-concept made into reality.

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One of the largest hobbyist 3D printers built, with parts printed from another printer!

Licensed under CC-BY-NC-SA 4

It's here, after 6 years of work!

The Blackstone Cube design began in 2018 (when I was in 7th grade) as a proof-of-concept 3D printer. Today, after an entire redesign, it has been successfully built.

Now, keep in mind: This is a work in progress!

I can't stop you from building it, but the benchy that I printed in the video turned out to have lots of artifacts!


  • 500mm (X) by 500mm (Y) by (around) 600mm (Z)
  • Fully CoreXY setup with 9mm 2GT Belts
  • Kinematic bed mount (allows for uneven Z heights)
  • Fully modular X Carriage
  • MGN12H linear rails
  • High temperature AC heated bed
  • Auto bed leveling
  • Auto Z align
  • Natively runs Marlin Firmware

Yes, those features all exist on the Blackstone Cube. At the time it was designed, it was fitted with all the best technologies!

Blackstone Cube Assembly_Frame Extrusions v7.step

Check this for individual frame extrusions requirements

step - 27.88 MB - 11/12/2023 at 20:27


Blackstone Cube Assembly

Overall step file for the entire printer.

x-zip-compressed - 15.80 MB - 11/12/2023 at 20:26


  • 1 × Aluminum Extrusions (2020 and 2040 European) See Blackstone Cube_Frame Extrusions.step for more information

  • Extruder Assembly

    Xieshi Zhang11/12/2023 at 20:55 0 comments

    The extruder assembly is also fully modular.

  • Kinematic Coupling

    Xieshi Zhang11/12/2023 at 20:50 0 comments

    The printer uses Kelvin Coupling, as demonstrated here (credit to Wikipedia)

    A total of six contact points is required for kinematic coupling. The bed mount emulates that using magnets.

    Point 1 (technically infinite points, but it is to emulate the three point inverted pyramid):

    Point 2 (2 points):

    Point 3 (1 point):

  • Work In Progress!

    Xieshi Zhang11/12/2023 at 20:29 0 comments

    This project is WIP. More updates coming soon!

View all 3 project logs

  • 1
    "Complete" Instructions

    I have made an animation that goes over the basics of how to assemble the project, but the Y axis and X axis assemblies need more details.

View all instructions

Enjoy this project?



Peabody1929 wrote 11/13/2023 at 17:48 point

Have you checked the tolerance for the "flatness" of the extrusions the print head rides on? 

  Are you sure? yes | no

Xieshi Zhang wrote 11/14/2023 at 06:12 point

I have not checked that, but I'd imagine the extrusion itself is relatively straight, plus the X carriage rides on a linear rail. 

The extrusion however does ride on 3D printed carriages, so I assume there would be some deviation in leveling, but that's hopefully rectified by auto Z leveling with the 3 Z screws.

  Are you sure? yes | no

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