BLV mgn Cube

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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.

BOM | BILL OF MATERIALS

To build the printer you need mechanical and electrical parts that need to be prepared in advance as well as parts that I designed for the BLV mgn Cube 3d printer. This section will help you figure out where you can get the required parts. I purchased the parts myself, checked them out and organized all the information for you in an optimal way, that will help you understand what you really need for the project.

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To get started, you need to make a decision regarding the next two questions  in the following flow chart:

BOM Menu

• Frame

• Motion system

• Main Electronics

• Mechanics

• Screws

• Panels

• Optional

• Tools

• Useful links

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• 9 x 2040 aluminum extrusion 496mm (Wide Beams)

• 3 x 2020 aluminum extrusion 576mm (Aux wide Beams)

• 1 x 2020 aluminum extrusion 460mm (X axis)

• 4 x 2040 aluminum extrusion 560mm (4 corners height beams)

• 2 x 2040 aluminum extrusion 442mm (Z axis)

• 2 x 2020 aluminum extrusion 405mm (bed frame)

• 2 x 2020 aluminum extrusion size:

  • for CR-10 bed:173mm

  • for Anet bed: 142mm 

  • for E3D High temp (size 314x314) bed: 240mm 

  • for Ender 3 bed: 106mm

​Optional: Frame Reinforcement for higher Z axis builds (465mm+)

• 1 x 2020 aluminum extrusion 496mm

• 4 x aluminum 2020 Brackets 20x20 \ 20x17

​Other:

• 2 x T Shape Bracket 60x60 (supporting the Z rails extrusions)

• 14 x Corner 90 degrees Angle Bracket for 2020/2040

• 100 x aluminum 2020 Brackets 20x20 \ 20x17

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Getting the frame Kit:
notice that you may be able to get a much cheaper price for the extrusions locally.

• Aluminum frame kit - anodized after cut+Brackets But NOT blind joints frame

• Fysetc - frame aluminum profiles Set / Full frame Kit - Blind Joints frame.

• Funssor - frame Kit containing all the needed extrusions - NOT blind joints frame

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Screws and bracket kits:

• Fysetc Brackets, corners, T-nut and M5 screw kit

• Funssor Brackets, corners, T-nut and M5 screw kit

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Notes:

• Please be precise and use the correct extrusions without shortcuts. using the 2020 profile instead of 2040 may reduce the frame rigidity.

• The BOM below is for 365mm Z height, If you wish to build a different size, then use the Calculator excel file named: "BLV_mgn_Cube-Frame_calculator.xlsx" can be found at the project Zip file.

• It is recommended to use regular european extrusions with mgn rails other than V-slot type.

Rails

• 5 x Mgn12H Carriage + 400mm Rails (Use Frame calculator for other Z sizes)

Update: Thanks to Jerry.h now we have two good options for rails:

• Set of cheaper rails for 17$ each (i bought it first).

• Set of Hiwin rails which are the best rails that exist on earth or Single Hiwin rail
  one of the biggest stores on Aliexpress is authorized Hiwin dealer and decided to
  offer a full kit of Hiwin rails for 38$ each rail. in my area ii sold 80$ for one rail. if you can afford it - That's a steal! even E3D chose to use Hiwin rails with their builds. (Notice: Hiwin rails should be tested with a load on the carriage). Click here to watch a video of the HIWIN rails I made

Stepper Motors

• 2 x X/Y Stepper motor: 17HM19-2004S Nema17 0.9deg 46Ncm 2A

• 2 x Z stepper motors: 17HS19-2004S1 59Ncm 1.8deg 2A

• 1 x Extruder stepper motor: 17HS16-2004S1 Nema17 45Ncm 1.8deg 2A

• 2 x GT2 Pulley 16 Teeth 5mm bore / excellent GT2 pully 16 Teeth (for X/Y steppers)

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Where to get the Steppers kit

• LDO Motor Kit for BLV mgn Cube 3D printer - One of the Best steppers I have personally tested. Much more cooler, excellent torque, and superb cost-efficiency ratio. recommended!

• Moon motors kit for BLV project - high-quality steppers

• stepper kit for BLV mgn Cube - stepperonline store - not tested yet

• Stepper motors kit from Blurolls store

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Belts system (check assembly section):

• 24 X F623 ZZ Flange Ball Bearings - number 2 or 3 option
  I recommend flipping the belts at the rear (check the belt system image), please do not use the geared GT2 16T.
  note: There is an Amazon seller who sells low-quality 623zz for triple the price!. his bearings are loose and it will ruin your printing experience.

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Belts & Threaded rods

• 1 x 4m Gates 6mm GT2 Fiber Glass Reinforced Belt / 4m Gates 6mm GT2 Fiber Glass Reinforced Belt - tested / 2 x 2m 6mm GT2 Reinforced Belt

• 2 x 3D Printer Lead Screw Diameter 8mm Lead8mm 400mm

• 2 x Aluminum Coupler 8x5x25mm (I prefer this option) or spider couplers

• 1 x Good BMG extruder / metal BMG extruder / BMG extruder / Clear BMG extruder

• 1 x 1m Capricorn clone PTFE tube 1.9mm or 2mm id

• 2 X optional: 635zz Ball Bearing for aligning the stepper's shaft

• 3 x Silicone sock - helps keep the nozzle temperature steady

• 1 x Spring steel sheet 300x310+PEI sheet+magnetic sheet

note: Usually a large quantity of screws is sold in bulk so I rounded the quantities.

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• 300 x M5 10mm Button Head Socket Cap Screw (buy at least 300~350)

• 2 x M5 16mm Button Head Socket Cap Screw

• 4 x M5 35mm Button Head Socket Cap Screw

• 200 x M5 washers

• 4 x M4 40mm Flat Head Machine Screw - only using CR-10 24V bed

• 2 x M4 30mm Hexagon head

• 78 x M3 8mm Socket Head Cap Screw (buy at least 100)

• 4 x M3 40mm Flat Head Machine Screw - only if using Anet E12 12V bed

• 2 x M3 50mm Socket Head Cap Screw

• 13 x M3 35mm Socket Head Cap Screw

• 2 x M3 30mm Socket Head Cap Screw

• 1 x M3 16mm Socket Head Cap Screw

• 5 x M3 16mm Socket Head Cap Screw - Only if NOT using Block cover

• 8 x M3 18mm Socket Head Cap Screw - Only if using the Block cover

• 3 x M3 25mm Phillips round head

• 1 x M3 22mm Phillips round head

• 4 x M3 40mm Socket Head Cap Screw

• 11 x M3 14mm Phillips round head

• 2 x M3 18mm Phillips round head

• 3 x M3 25mm Socket Head Cap Screw

• 2 x M3 10mm Socket Head Cap Screw

• 8 x M3 22mm Socket Head Cap Screw

• 8 x M3 12mm Socket Head Cap Screw

• 4 x M2.5 12mm Flat Head Machine Screw

• 283 x M5 T-nut (buy at least 300)

• 2 x M4 Nut

• 40 x M3 T-nut

• 62 x M3 0.5mm Washer (put 2pcs of 0.5mm or one of 1mm washer) (buy at least 100)

• 26 x M3 Nut (buy at least 50)

• 16 x M3 Nyloc

How I created the walls / semi-enclosure?

Well, it's cheap and very easy..

You can choose one of those options:

• 4mm Cardboard sheets (cheap)

• KAPA foam boards (cheap)

• aluminum composite panel

• 4mm Plywood sheets

Then apply this adorable Carbon Fiber Vinyl on the board.
you can use M3/M5 screws to secure the board to the panels.

• easy fast wires connectors

• 1M Corrugated tube

• optional: Mayitr Black Wrap Braided Cable Sleeve Wear Resistant like Prusa

• solid state relay SSR-25DA to turn ON the printer with button

• SSR Heatsink

• optional: DC step-down module LM2596 (if you are going to use 12V fans/ Led strip)

• 5M LED strip 5050 60leds/m 44key waterproof

• Wago Compact Wiring Connector

• activated carbon filter (for the bigger air scrubber)

• 500pcs replacement 3/32'' G10 Hardened Precision Steel balls for mgn12H rails

• 100K NTC 3950 Thermistors (replacement if broken)

• Hepa Filter for ilife vacuum robots for the smaller air scrubber

• Hepa Filter for eufy robovac 11c for the bigger air scrubber

• Soundproofing Foam Acoustic Sound Absorption Tile

• Brass brush for Hotend cleaner

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Filaments I used for the Project​

• NOULEI Silk Filaments | link2

• 1kg PETG transparent green

• 1kg PETG transparent blue

• 1kg PETG transparent black

• 1kg PLA Silver

• 1gk PLA Silk gold color - The best Silk filament that I have tested so far

• MUST have: 90 Degree Corner Clamps if you want good printing results.

• Cable Cutter

• SN-28B Dupont Crimping Tool

• Tapping Kit M3,M4,M5,M6 - mainly for the corners holes

• PTFE Tube Cutter

• Set Wire Copper Terminal

• 10 pairs JST Plug Male to Female Wire Connector for Dupont wires.

• dehumidifier (moisture absorb) for your dry box The best i have tested in my dry box.

• Stainless Steel Digital Caliper

• Set Dupont Wire Jumper Pin Header Connector Housing Kit Male

• Cable Organizer

• TS100 Soldering iron (my favorite)

• Belt Tension Meter/gauge - 3d Printed tool

• Full screws kit for the BLV mgn Cube from Blurolls

• Hardware Kit Screws, Nuts and brackets for BLV mgn Cube Project

• 440pcs Set of M3 Socket Cap head DIN912 screws

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