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Bill of materials

Every mechanical and electrical part besides the printed parts. I bought and tested these parts myself. Quantities are for a 365 mm Z height. For other sizes, use BLV_mgn_Cube-Frame_calculator.xlsx from the project ZIP.

Kits are no longer sold

The full kits, the Metal Kit and the Blind Joints frame were once sold by FYSETC and Blurolls. This list covers the individual parts, and the Metal Kit drawings are still in the project files. Metal or printed? CNC parts are about 10× stiffer and ready to install, but must be machined. Printed parts are cheap and easy to remix, but less rigid and slow to print.

Frame

Buying the extrusions from a local supplier is usually cheaper. Use regular European extrusions with MGN rails, not the V-slot type, and don't replace 2040 profiles with 2020, since that reduces the stiffness of the frame.

Extrusions

  • 9 × 2040 aluminum extrusion, 496 mm (wide beams)
  • 3 × 2020 aluminum extrusion, 576 mm (auxiliary wide beams)
  • 4 × 2040 aluminum extrusion, 560 mm (corner height beams)
  • 2 × 2040 aluminum extrusion, 442 mm (Z axis)
  • 2 × 2040 aluminum extrusion, 405 mm (bed frame)
  • 2 × 2020 aluminum extrusion for the bed, by bed type:
    • CR-10 bed: 173 mm
    • Anet bed: 142 mm
    • E3D high temperature bed (314 × 314): 240 mm
    • Ender 3 bed: 106 mm

X axis, choose one:

Frame reinforcement for heights of 465 mm and more (optional):

Triple Z magnetic system: an unofficial triple Z add-on based on the work of community member Druce Taylor.

Brackets:

Frame calculator Frame measurements Frame reinforcement Extrusions

Motion system

Rails

Tip

For precise rail installation, use this alignment adapter.

Genuine HIWIN MGN rails for the BLV mgn Cube

Stepper motors

Belt system

The belt path is shown on the Assembly page.

Warning

Avoid the Amazon seller who sells low quality 623ZZ bearings at three times the price. The bearings are loose and ruin print quality.

Belts and lead screws

Main electronics

Start by choosing the firmware: Klipper or RepRap.

Klipper is faster and has more advanced features.

Board, choose one:

Drivers, choose one:

Host computer, choose one:

Z probe, choose one:

Power, wiring and fans:

Hotend, choose one

  1. Mellow NF-Sunrise V1.1 lightweight dual drive extruder, with the Mellow Fly-SHT board.
  2. Trianglelab TCHC TD6 high flow 24V with the BIQU Orbiter V2.0 extruder and the Mellow Fly-SHT board.
  3. BIQU H2, a lightweight extruder and hotend in one unit. I use the H2 V2S Lite on the 48V setup at 25K acceleration and 1250 mm/s. A carriage for the H2 series is in the project files.
    1. BIQU H2 V2S Revo
    2. BIQU H2 V2S Lite, only 180 g (preferred)
    3. BIQU H2 V2.0
  4. Trianglelab Matrix:
    1. Trianglelab Matrix
    2. Trianglelab Matrix LC Lite with a water cooling system (24turn12v option) and thermal fluid

Trianglelab hotend with RepRap firmware

Replace the M305 line in config.g with: M305 P1 T100000 B4725 C0.0000000706 R4700

Tool changer (advanced): E3D toolhead clone by Funssor for MGN12H

Hotend upgrades:

Heated bed (8 mm plate)

Mechanics and more

Screws

Screw list (35 items, quantities rounded for bulk packs)
Qty Part Note
300 M5 10 mm button head buy 300 to 350
2 M5 16 mm button head
4 M5 35 mm button head
200 M5 washer
283 M5 roll-in spring T-nut buy at least 300
4 M4 40 mm flat head for the bed
2 M4 30 mm hex head
2 M4 nut
78 M3 8 mm socket head buy at least 100
2 M3 10 mm socket head
8 M3 12 mm socket head
1 M3 16 mm socket head
5 M3 16 mm socket head only without the block cover
8 M3 18 mm socket head only with the block cover
8 M3 22 mm socket head
3 M3 25 mm socket head
2 M3 30 mm socket head
13 M3 35 mm socket head
4 M3 40 mm socket head
2 M3 50 mm socket head
11 M3 14 mm Phillips round head
2 M3 18 mm Phillips round head
1 M3 22 mm Phillips round head
3 M3 25 mm Phillips round head
40 M3 roll-in spring T-nut
62 M3 0.5 mm washer two 0.5 mm or one 1 mm per spot, buy at least 100
26 M3 nut buy at least 50
16 M3 Nyloc nut
4 M2.5 12 mm flat head

A 440-piece set of M3 DIN912 socket head screws covers most of the M3 sizes.

Panels

The walls are a cheap semi-enclosure that keeps the chamber warm and quiet. Use 4 mm cardboard or KAPA foam board (cheapest), aluminum composite panel or 4 mm plywood. Cover it with carbon fiber vinyl and fix it to the frame with M3 or M5 screws. The DXF and DWG files are in the project ZIP.

BLV mgn Cube panel dimensions

Optional

Filaments I used:

Filament dryers:

Tools