Core-R-Theta-4-Axis-Printer

The Core R-Theta Printer

This is my 4 axis, polar, “core-RΘ” 3D printer – an entirely new type of multi axis 3D printer designed from the ground up.

Check out my youtube video to see it in action!

Slicer

A multi axis printer is pretty hopeless without a non-planar slicer, which is why I built this quick radial slicer for the printer. This leverages the printer’s rotating nozzle to print simple parts without supports, but there are some limitations to it which I cover in the YouTube video. I’m also working on an optimization based slicer which will be able to print any object without support so stay tuned for that!

Assembly

There is a wealth of knowledge in the Discussions, Pull Requests and Issues tabs of this repo. The printer is by no means “plug and play”, and there are no instructions as of yet, but the information in the discussions should help you get started. Feel free to post questions on the discussions tab.

You can view the 3d model online to see how to assemble the printer. Everything is 3D printable, however I got the extruder mount made out of metal by JLCPCB as there is quite a bit of torque on that part. I’ve also included the gerber files to make your own PCB buildplate, but a sheet of MDF wood would also work.

BOM

Some links are included so you know what to get, but they are by no means the best source to get the parts.

	Qty		Note
Frame
2040 Extrusion 350mm	1	Aliexpress
2040 Extrusion 100mm	1	Aliexpress
2020 Extrusion 150mm	1	Aliexpress
2020 Extrusion 250mm	1	Aliexpress
2020 corner bracket	10	Aliexpress
Hardware
2020 T Nuts	50	Aliexpress
MGN9 250mm Rail	1	Aliexpress
MGN12 250mm Rail	2	Aliexpress
MGN9C Block	2	Aliexpress
MGN12H Block	2	Aliexpress
M4 Screw Set		Aliexpress
M3 Screw Set			Need 40mm screw
M3 Square Nut	50	Aliexpress
MR85ZZ (5x8x2.5)	4	Aliexpress	B axis
6810ZZ	2	Aliexpress	C axis
5mm Rod 50mm length			B axis
5mm Flange coupling
5x11x6 collet	1	Aliexpress	B axis
Drive
Nema 17 300mm Lead Screw	1	Aliexpress
T8*8 Lead Screw Nut	1	Aliexpress
Nema 17 34mm	3
GT2 Belt Loop 410mm	1
GT2 Belt Loop 760mm	1
GT2 Pully 16T	2	Aliexpress
GT2 Idler 16T w/o Teeth	4
GT2 Pully 40T	1
GT2 Idler 16T w/ Teeth	2	Aliexpress
Electronics
Control Board	1	Aliexpress
24V 10A Power Brick	1	Aliexpress
5.5x2.5 plug	1	Aliexpress
long nozzle	1	Aliexpress
aquarium pump	1	Aliexpress
BIQU H2 V2S extruder	1	Aliexpress

Bibtex Citation:

@software{Bird_Core_R-Theta_Printer,
author = {Bird, Joshua},
license = {View repository for custom license.},
title = {{Core R-Theta Printer}},
url = {https://github.com/jyjblrd/Core-R-Theta-4-Axis-Printer}
}