The RIFF 600/900 large 3D printer

This is a 300x600 (RIFF 600) or 300x900 (RIFF 900) size DIY printer that can be built without spending a fortune. I encourage the use of second hand parts and will not provide any complete BOM listing specific new components. 

Some key information about my build:

• Build plate 300 x 600 (assembly with 2 pcs 300x300 heat beds, 3 pcs in the 900) 
• 2020 and 2040 extrusions 
• SKR 1.4 turbo and SKR Pico controllerboards 
• Radxa Rock 3C SBC 
• MGN 12H rails/carriage on Y and X. (350mm on X and 2x650 or 2x 950mm on Y)
• 12mm rods and bearings on Z 
• Cartesian (the belts are a bit too long for corexy) 
• Klipper firmware 
• Dual Y steppermotors
• Sensorless homing on X and Y 
• Dragonburner with Sherpa micro 
• 2 x 360W 24V power supplies (3 x 360 24V in the 900 version)

I am publishing a build series on Youtube and will publish the required parts/info at the same time as the videos.

Updated CAD-model on: https://github.com/itesdahl/RIFF

Design and frame:

Cutting extrusions:

• 4x2020 775mm for Y (or 1075mm for the 900 version)
• 2x2020 450mm and 2x2040 450mm for X
• 6x2040 340mm for Z (or optionally 370mm)

Blind joints and corner plates plates:

• Tap M5 holes in all 6 2040 Z extrusions (or minimum 4 of them as shown in the video)
• Tap M5 holes in the top Y extrusion at least in one end. (The one facing the rear of the printer) 
• Optional but recommended, tap Y-extrusions in both ends to provide for two extra sets of corner plates and a couple of cover plates
• Drill access holes in all Y-extrusions to get to the button head screws in the Z-extrusions
• Attach the front and rear corner plates. The front 2040 x extrusion should sit 40mm below the top of the Y-extrusion

Next step:

• Check the frame for squareness and adjust/correct  as needed.
• Mount the 4 z-motor mounts with M5 10mm bolts. The motor mounts makes the frame more rigid. Check the frame again for squareness.

Part 2 skirts and covers

Parts for the front and rear arms (heat bed sub assembly):

Front 1x366mm 2020 extrusion and 2x625 bearings

Rear 1x322mm 2020 extrusion

Part 3

The 2020 extrusion for the x axis is 440mm

On my 600 build the 2020 extrusions for the bed assembly is 2 pcs 645mm. You have to check the bed mounts on your heat bed to determine if you need longer extrusions.

Part 4 config and motion