R-CNC , the new cheap printable CNC milling machine

by RoMaker, published

R-CNC , the new cheap printable CNC milling machine by RoMaker Mar 7, 2017
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I created the R-CNC because the printable CNCs found on the net did not suit me, I even mounted a very famous on Thingiverse but it lacked a little rigidity, and especially it was the “ Hell to keep the X and Y axes well perpendicular!


I also wanted to keep the mind “Printable cheap CNC, easy to assemble, easy to use” for the same budget with better quality 🙂 It’s done! The budget of this complete CNC revolves around € 350 router included! Free files and tutorials!
-First test on wood: https://youtu.be/H5pt9VghuUc
-First test on aluminium: https://youtu.be/h7Xl7bpki0o

The CNC is made with printable parts and mason box screed !

It has a large area of useful milling, 550x550mm

Fully Autonomous and very easy to use, it just needs to be plugged into an plug:
-Place it at the desired location
-Connect the plug
-Fix the milling stock
–Set the end mill manually to the point of origin with the adjustment wheels
-Insert the SD card containing the g-code
-Start the program via the LCD

It also has 4 rubber pads at each angle, anti-vibration and anti scratch.

The electronics are integrated into the machine and it has a front USB port to connect a computer to the Ramps 1.4 if necessary without dismantling everything.

Clean installation thanks to dragchains

The pressure of all bearings on the square tubes is fully adjustable

Very high torque for Y moving thanks to a nema motor 23 multiplied by 3 with pulley 20×60 teeth

Integrated LED lighting

Easy mounting with printable drilling templates

Tested successfully on wood and plastic at 700mm / min and passes of 2mm, the measurements are perfect at 5 / 100th of mm, the diagonals of the squares are equal, the round ones are round!

Other tests are coming on aluminum and carbon, in any case I already have much better results than with other CNC printable 🙂

I can create a support for different routers if given me the measurements (Dremel, Kress,...) 65mm et 52mm spindle mount available now, watch my other things.

Complete tutorials are available in English and French on http://www.makerfr.com

And please click "like" ;)

March 20:
-Add support for Nema23 on X axis
-Add supports for M8 nuts 13mm thickness

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How hard do you think it would be to use 3/4-in Aluminum Metal Flat Bar, as is easily available in the hardware stores? Here is a link: https://www.lowes.com/pd/Steelworks-8-ft-x-3-4-in-Aluminum-Metal-Flat-Bar/3058159
I could take my caliper to the store to get exact measurements. There are many dimensions available.

Hi ! Have you an other link because i have " access denied" !


Mar 9, 2017 - Modified Mar 9, 2017

This looks great, but sourcing the aluminum box screeds you used for this build is nearly impossible and crazy expensive in Canada. Even in the USA those aluminum box screeds are anywhere from double-triple the price of Brico Depot online store in France. It would have been cheaper in Canada to build it out of 2080 standard aluminum profile or even 3/4" MDF. I have seen this design before built out of MDF. As an example from a masonry supply place close to me, they need to custom order they want almost 60$+shipping CAD for a 2m segment that's only 8.7 EUR from Brico Depot.

Again this is a beautiful build, but it makes me sad to see that the materials used to build it are out of reach for most of us.

wow ! I thought that in North America there might be problems to find the right size because it is in imperial units, but I did not think it would be as expensive!
I may be living in North America in two years, if it ends, I'll make a version for North America! But it's maybe a bit longer to wait that !
If the request is great I'll do it before ;)

There's a lot of things in Canada in particular that are ridiculously expensive compared to Europe. Only recently has aluminum profile framing become somewhat available locally and it's still more expensive than in Europe or the US. Ordering the aluminum profile from China even with shipping is 60% cheaper than sourcing from a local supplier as the local suppliers charge exorbitant shipping fees to order it in. At least where I'm from metric fasteners can be ordered very cheaply. That's the appeal of the MPCNC ;) it uses materials that are very cheap here.

I understand your position, If I created this cnc it is because I had assembled an MPCNC and it was really a gadget with big problem of X / Y perpendicularity and lack of rigidity even with the V2.0.
If you want to do decorative engraving it will do the job very well, but if you want something precise with a minimum of rigidity, you will cry like me !

Mar 9, 2017 - Modified Mar 9, 2017
jjazzyj - in reply to RoMaker

I guess I will see how my build goes with it. I'm using PETG and only 100mm of Z in the hopes of eliminating some of those problems. I don't need much Z as I already have several 3d printers. Your design is a proven CNC platform framework which will obviously be capable of much higher feed-rates and more rigidity. A more north american friendly design while keeping the price low will be 1" aluminum square tubing for the rails, and for the "box" just use 3/4" painted MDF boards with 3d printed corners.

Thanks for the idea, I'll think about it, but I have a few things to do before !

Do you have source available somewhere? Doesn't have to be up to you to adjust for regional difference ;)

Wonderful design! It looks very nice and precise.
And also the webpage with instructions and part list is perfect.
Thank you for sharing!

Thank you Tommis, you'r welcome ;)

Génial !
Tu as su reprendre l'idée des premières cnc diy avec les règles de maçon (type G. Coquery) avec la conception de pièces plastiques imprimées pour son assemblage, ect... Je crois que dès que ma nouvelle prusa i3 est finie, j'en construis une. J'avais abandonné à l'époque de me faire une "Coquery".
Merci à toi.

Mar 8, 2017 - Modified Mar 8, 2017
RoMaker - in reply to xfifi

Merci ! Tu vois je savais même pas qu'il y a eu une mode des cnc en règles de maçon !
En tout cas il me tarde de voir les premières réalisations :) Et cet après midi j'aI mangé du MDF avec des passes de 4mm de profondeur sans que ça bronche ! :D


I would love to try building one of these when I have the money to burn.

Nice machine!

Thank you Big-E ;)