BLV mgn Cube

3D Printer

Hi, my name is Ben Levi and This is BLV mgn Cube - an open-source 3D printer project. building your own good and reliable 3D printer is the main purpose of this project. Basically, it's an open front structure CoreXY 3D printer, based on

mgn linear rails for maximum accuracy, efficiency

and high print quality.

blv cubg mgn trans-min.png


Since the project was released there have been few updates, add-ons, and improvements.

In order to make it easier for you to choose the right files for your build, I have created a new download page.

Do you have the Metal Kit for BLV mgn Cube?

There are two download options, the first contains all the original files of the project in case you intend to print all the mechanical and structural parts. The second option is for those who managed to get the METAL KIT . As you known, the METAK KIT significantly cuts the amount of the printed parts - saving you lots of printing hours, Providing more stable, reliable and accurate 3D printer.

I have the metal kit

This is a lighter version of the original BLV mgn Cube project zip file, I removed all the unnecessary files for those who have the METAL KIT . Just print the hotends setup and the Front panels. all the other parts are optional. file size is 35.5 MB and is available for download here:

I don't have the metal kit

This is the original file of the project - with all the printable parts. It contains all the necessary info including documents, drawings, print profile, CAD files, printable STL files, and more. Details about the contents of the folders provided below. file size is 50.8 MB and is available for download here:

I allowed myself to add a short description of each folder that appears in the project zip file:

  • Documents
    Many PDF files with most of the information needed for the BLV mgn Cube 3d Printer project.

  • Firmware
    content of the SD-card for the Duet/Reprap board

    • Duet 2 Wifi -The original BLV mgn Cube content of the SD-card for Duet 2 Wifi, version 2.xx+

    • Duet 3 - The basic BLV mgn Cube content of the SD-card for Duet 3 Reprap 3.xx+

  • Frame Panels 
    all the needed measurements for making enclosure panels

  • open source
    The original CAD files for the BLV mgn Cube project including a few new addons and upgrades.

  • Slicing Profiles
    Simplify3D slicing profile. (Cura has inside a BLV mgn Cube profile) Soon a Prusa slicer profile will be released too.

  • STL files to print
    All the STL files need to printed including optional addons, upgrades and custom mounts.

    • Bed Holder For Anet E12 Bed​ - a Bed carriage mounts suitable to the Anet E12 heated Bed.

    • Bed Holder For CR-10 Bed- a Bed carriage mounts suitable to the Creality CR-10 heated bed.

    • Biqu H2 extruder adapter For Metal kit - a BIQU H2 extruder adapter and Fan mount for the Metal Kit.

    • BLV optic Led cable concept - a concept add-on reflects the Duet indicator lights to the front - soldering free.

    • Chimera front plate adapter - suitable for Chimera Hotend.

    • Direct Drive - a Direct Drive upgrade for the BLV mgn Cube 3d printer.

    • Frame wires Holder - a 3d printed wires clip, easy to install on 2040/2020 extrusions - 3 sizes!

    • Front Panel - All the STL and PDF files for the Front Panel of the BLV mgn Cube 3d printer.

    • Hotend Setup for Metal kit -all the files for the New hotend setup using the Metal KIT - more upgrades available as community remixes.

    • Jigs - main Jig for the BLV mgn Cube installation and 2 Jigs for 2020 and 2040 linear rails fixing.

    • Nozzle cleaner - Brass Brush - BIQU H2 extruder

    • Nozzle cleaner - new silicone wiper - BIQU H2 extruder.

    • Optional - Air scrabber - Small air scrubbers, filtering the printing fumes.

    • Optional - BIG Air scrabber - Big and effective air scrubbers, filtering the printing fumes.

    • Original Bowden Hotend -The original BLV mgn Cube full hotend setup (not suitable for the Metal kit).

    • Side LED diffusers - All the files for the side mounted led lights

    • Trianglelab Matrix adapter For Metal kit - BIQU H2 extruder

    • Twin fans Bowden Hotend - Upgraded part cooling part, using Dual 4010 blowers.

    • Zesty Nimble - adapter for the Zesty Nimble extruder - left and right versions.

    • all STL files...

3D Printing the Parts

In this section, I will help you understand how to print the different parts of the printer. The way you are going to print the parts is very important and there is a huge impact on the functioning of the printed parts. Therefore, you must pay close attention to the printing instructions. Everything is important: Orientation, amount of walls/perimeters, printing angle, type of filament, and even the printing speed.

Is it possible to get a kit of printed parts?

Not everyone has a 3D printer available or enough free time to print all the required parts for the BLV mgn Cube project. There are paid services that can print the parts for us, In most cases, the price will be expensive because it is a service that is priced mainly according to printing time.

However, I found a cheap yet good solution for those who want's an already 3d printed parts kit. a store on Aliexpress started selling a BLV mgn Cube 3d printed parts for pretty cheap, they used PETG green filament and 80% infill. T his may be a good solution if you don't have time nor 3dprinter.

LINK: 3d printed parts for BLV mgn Cube 3d printer

All the parts were designed to be easily printed and most of them would not require support. to make it more convenient I added two tools that can help you decide how to print the parts:

  • 1. Print Orientation guide - The image below visualizes exactly how you should place all the parts on the build plate. Some of the parts will require support such as the Tensioner idler holder, so pay attention before hitting the start print button. you may notice that some of the parts have text such as X90, Y-90.. it the rotation value to set the part on the build plate correctly.

  • PDF fils/Images - down below you will find a few sketches of the main components. Each part has his name on it with the recommended infill percentage and material to print with.

Filament type for the BLV parts
All parts must be printed using filaments that can handle the stress, pushing forces, temperature and so.

Therefore, the recommended filaments for this purpose are:

  • PETG - I used it

  • PETG Carbon - Very rigid, need to be printed with a hardened steel nozzle.

  • ABS - Needs enclosure, toxic foams

  • PA12 - MJF/SLS printed

Please avoid printing parts using PLA/PLA+, it will deform due to the high temp inside while printing.

Common print settings

  • please use at least 6 outer walls/perimeters

  • 7 bottom layers

  • 7 top layers

  • most parts are going to need 80%+ infill
    there is a sketch with the part's name and the exact infill percentage to use for each part.

Printing orientation

The direction in which you place the part on the bed while printing has a huge effect on the strength of the part.

Therefore, it is very important that you take a good look at the image I have added below.

The picture shows the correct way to place the parts on the bed before printing:


Parts descriptions

I have prepared for you a gallery that contains further details on the printed parts.

Each image has a separate set of parts. Each part comes with the name and mode of printing.

Important: If there is a detail that contradicts what I wrote above (how to print section), then there is a higher priority for the text I wrote above (6 outer walls/perimeters, 7 bottom layers, 7 top layers).