CoreXY / First build

CoreXY / First build Hi :) I've been a bit further in my 3D printer project, i thought i'd post a few pics to get advises ! Of course it's still 'WIP'. A lot of work to do on the head carriage ! So, that's my first 3D printer, and i really want to build it myself, that's part of my pleasure. After studying different geometries, i decided to go for a coreXY implementation (because it looks such a simple and efficient solution). The "cube" is made of 40mm square aluminium extrusion (about 1.6"), and 10mm (2/5") plywood. - Basically the whole motors/belt/pulley system is attached to the top plywood plate. - The "Y" rails are 8mm rods, held on the aluminum extrusions using SHF8 brackets (the flange mounted ones - not shown on my cads). This should allow to square everything perfectly. - The "X" rail is an Hiwin MGN9 rail/bearing block. At the beginning i thinked i would use 2 rails, but they are actually so stiff that only one will be needed. - Z will get an 8mm trapezoidal screw + delrin anti-backlash nut - Belts are GT2 (not on CADs) - Belt pulleys are RC helicopter parts. - I bought a smoothieBoard to drive it. Dimensions are 50cm x 50cm x 60cm (20"x20"x24") for a printing volume of 21x21x33cm. Not efficient at all about dimensions :D anyway ^^ I plan to print PLA only. Any advise appreciated ! :) PS. please forgive my english mistakes, it's not my mother-language :) https://reprap.org/forum/read.php?397,454488,454488#msg-454488 Sat, 07 Mar 2026 07:58:07 -0500 Phorum 5.2.23 https://reprap.org/forum/read.php?397,454488,525855#msg-525855 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,525855#msg-525855
Sorry for the late answer…
The firmware is Smoothie, on a smoothieboard.
This card works like a charm :)]]> tpra CoreXY Machines Thu, 25 Jun 2015 05:53:29 -0400 https://reprap.org/forum/read.php?397,454488,515577#msg-515577 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,515577#msg-515577

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tpra
Here's a video of one of the test/setup prints :) Still needs a lot of fine-tuning but i'm so happy to see it move :) just stayed watching it printing for hours :D
[www.youtube.com]

wich is the firmware used ?
Are used the ramps 1.4 with arduino mega ?]]> csystem CoreXY Machines Sat, 30 May 2015 13:52:28 -0400 https://reprap.org/forum/read.php?397,454488,482287#msg-482287 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,482287#msg-482287
Sorry for the late response. Eventually I have gone with my own design. I have done so for the simple reason that my "working" Delta printer is not so much working for these parts. I simply can't get it to print such solids parts as you are using. Warping and loosing contact with the bed all the time. Maybe because I am using ABS.

So I am going to go with a design that I have more confidence that I can print - And even if I can't print it, I can fabricate it in other materials.

How are your printer working out for you? Can you keep the carriage stable enough for thin wall prints?]]> LarsK CoreXY Machines Wed, 11 Mar 2015 09:39:49 -0400 https://reprap.org/forum/read.php?397,454488,478663#msg-478663 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,478663#msg-478663

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LarsK
Hello,

This is really a nice build.

Will you upload the CAD files (either as SW or IGES) for the machine? I am about to build one myself and I would like to use your way of holding the nozzle. It is very elegant.

How did your Z plane work out?

PS. The parts your friend made for you also looks really great (!). Don't be too disappointed if you cant make something like that right away.

Hi,
Thanks :)
It prints parts, with a correct geometry, i wasn't expecting much more (well, i assume i knew building the first one would just lead me to modify it almost immediately / build another one :) )
Here's a picture of a print (fanduct problem on top, solved since that print) : [pix.slic.it]

Actually it's my first printer, and it has design flaws that i want to correct.
I already made a (huge ^^) list of what i want to make better / easier, and began to think about the next version, with lot less vitamins needed, easier fine tuning of geometry (x,y,z and bed level), better quality linear motion components (still don't know between full hiwin or a hiwin/igus mix), a bed that's 'really' flat.
It will be released open source, but i wouldn't like to release what i consider unfinished and complicated to put together (i.e. this version).

Still, if you want any part CAD of the current design, i can upload it to github if needed, just keep in mind it's a "prototype" ;) :)]]> tpra CoreXY Machines Tue, 03 Mar 2015 18:54:07 -0500 https://reprap.org/forum/read.php?397,454488,478516#msg-478516 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,478516#msg-478516
This is really a nice build.

Will you upload the CAD files (either as SW or IGES) for the machine? I am about to build one myself and I would like to use your way of holding the nozzle. It is very elegant.

How did your Z plane work out?

PS. The parts your friend made for you also looks really great (!). Don't be too disappointed if you cant make something like that right away.]]> LarsK CoreXY Machines Tue, 03 Mar 2015 13:10:15 -0500 https://reprap.org/forum/read.php?397,454488,473997#msg-473997 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,473997#msg-473997 [www.youtube.com]]]> tpra CoreXY Machines Sun, 22 Feb 2015 07:50:28 -0500 https://reprap.org/forum/read.php?397,454488,471898#msg-471898 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,471898#msg-471898 angelo CoreXY Machines Tue, 17 Feb 2015 08:42:21 -0500 https://reprap.org/forum/read.php?397,454488,470979#msg-470979 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,470979#msg-470979 [www.youtube.com]]]> tpra CoreXY Machines Sun, 15 Feb 2015 10:33:33 -0500 https://reprap.org/forum/read.php?397,454488,470760#msg-470760 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,470760#msg-470760 -> video
Smoothieboard was pretty easy to configure, i'm very happy with it (still, i can't compare, i never tried anything else).]]> tpra CoreXY Machines Sat, 14 Feb 2015 13:25:55 -0500 https://reprap.org/forum/read.php?397,454488,470029#msg-470029 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,470029#msg-470029 everything moves as expected. very late here, tomorrow i'll connect everything to the smoothieboard and give it a try :)

[attachment 49181 IMG_2863b.jpg]]]> tpra CoreXY Machines Thu, 12 Feb 2015 20:08:01 -0500 https://reprap.org/forum/read.php?397,454488,468045#msg-468045 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,468045#msg-468045
Today i finished the case for electronics (12V and 24V power supplies, smoothieboard and LCD panel).
My friend just finished printing all the parts, i'll get them by 2 or 3 days, and the real fun will begin :)

CoreXY parts :
[attachment 48879 10842347_743009429128061_7535844738206214154_o.jpg]

Extruder parts (Almi3k on thingiverse) :
[attachment 48880 10847736_743225139106490_4408907242538271176_o.jpg]

The case (without smoothie and lcd) :
[attachment 48881 IMG_2840.jpg]]]> tpra CoreXY Machines Sun, 08 Feb 2015 17:36:13 -0500 https://reprap.org/forum/read.php?397,454488,463802#msg-463802 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,463802#msg-463802
[attachment 48250 n_z_1.jpg]
[attachment 48251 n_z_2.jpg]
[attachment 48252 n_z_3.jpg]]]> tpra CoreXY Machines Sun, 01 Feb 2015 06:48:24 -0500 https://reprap.org/forum/read.php?397,454488,462907#msg-462907 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462907#msg-462907

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Zavashier
To me it's very difficult to align 4 guides strictly parallel from eachother, attented you own measuring instruments precise enough to do that.

Thanks Zavashier for all your answers.
That's a very important point imho.
I have very high precision tools here. Still, i don't think it would be easy to align (i mean, even with the tools, even if you know how to use them, aligning 4 guides is very hard, you have more chances to get a self-blocking system than a smooth and free movement...).

As Zavashier said, all you need to get a "non-bending" cantilever is stiff triangle arms (what i didn't do at first :D i'm correcting it, will post pics of the updated version tomorrow).]]> tpra CoreXY Machines Fri, 30 Jan 2015 07:06:14 -0500 https://reprap.org/forum/read.php?397,454488,462817#msg-462817 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462817#msg-462817 Zavashier CoreXY Machines Fri, 30 Jan 2015 04:01:10 -0500 https://reprap.org/forum/read.php?397,454488,462801#msg-462801 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462801#msg-462801

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Kurzaa

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Floyd
There are a lot of machines that use a setup like yours with a single leadscrew and two guides.

These cantilever effects are exactly why I use 4 smooth rods and 3 Leadscrews mind you my bed is heavy it will weigh close to 4Kg when assembled

My smooth rods are 12mm with 2 bearings on each located at each corner of the bed and I'm using 3 TR10x2 leadscrews in a triangular configuration fed with a closed loop GT2 belt and 36 tooth pulleys all driven from a single NEMA23 motor.

Doug]]> dougal1957 CoreXY Machines Fri, 30 Jan 2015 03:28:23 -0500 https://reprap.org/forum/read.php?397,454488,462663#msg-462663 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462663#msg-462663

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Floyd
There are a lot of machines that use a setup like yours with a single leadscrew and two guides.

I was wondering about that. How does the bed stay flat? Wouldn't it bend on the opposite side?

What about having the two guides at the front with the single screw in the back? Or would that cause binding issues for the guides?

Sorry for the stupid questions.]]> Kurzaa CoreXY Machines Thu, 29 Jan 2015 17:16:14 -0500 https://reprap.org/forum/read.php?397,454488,462650#msg-462650 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462650#msg-462650 Zavashier CoreXY Machines Thu, 29 Jan 2015 16:46:00 -0500 https://reprap.org/forum/read.php?397,454488,462607#msg-462607 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462607#msg-462607 gforce1 CoreXY Machines Thu, 29 Jan 2015 15:37:20 -0500 https://reprap.org/forum/read.php?397,454488,462560#msg-462560 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462560#msg-462560 Floyd CoreXY Machines Thu, 29 Jan 2015 14:26:39 -0500 https://reprap.org/forum/read.php?397,454488,462487#msg-462487 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462487#msg-462487

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tpra

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Zavashier
What about 3 leadscrews drived by a single motor ?

I thought about it, my wood planer has such a system.
But pinions and chain would be needed, that's a bit overkill imho.
Ultimakers seem to work very fine, that's why i decided to go this way for Z.

Though, those metal squares really don't fit, a plywood square will be a lot more stiff.
+ i'm using a shouting board*, so the plywood square will be more square than those chewy-squares...

* not sure of the translation... it's called a "planche à recaler" in french, the purpose is to get (really) perfect squared edges on a piece of wood with a hand plane.

Ah yes I am using a GT2 toothed belt around gt2 pulleys with a motor (Nema23 290oz of torque so plenty) directly driving one of my Leadscrews which in turn drives the others thru my GT2 endless belt.

Doug]]> dougal1957 CoreXY Machines Thu, 29 Jan 2015 12:32:48 -0500 https://reprap.org/forum/read.php?397,454488,462470#msg-462470 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462470#msg-462470

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Zavashier
What about 3 leadscrews drived by a single motor ?

I will be doing just this on mine and using 4 12mm linear rods (2 each side) to control my Bed (400mm x 400mm and 6mm thick aluminium on a 20x20 extrusion frame)

Doug]]> dougal1957 CoreXY Machines Thu, 29 Jan 2015 11:31:10 -0500 https://reprap.org/forum/read.php?397,454488,462449#msg-462449 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462449#msg-462449 Zavashier CoreXY Machines Thu, 29 Jan 2015 10:59:19 -0500 https://reprap.org/forum/read.php?397,454488,462410#msg-462410 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462410#msg-462410 I would think 12mm rods with linear bearings would be fine but until its built who knows.]]> Floyd CoreXY Machines Thu, 29 Jan 2015 09:27:14 -0500 https://reprap.org/forum/read.php?397,454488,462302#msg-462302 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462302#msg-462302

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Floyd
Looking great!
How are you liking that Z axis?

Thanks :)
Actually i don't like that Z axis that much :D

The linear rails are ok (though they are loud), but metal squares are really too soft, i'll upgrade them with plywood made squares right now ;)]]> tpra CoreXY Machines Thu, 29 Jan 2015 04:51:20 -0500 https://reprap.org/forum/read.php?397,454488,462247#msg-462247 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462247#msg-462247 How are you liking that Z axis?]]> Floyd CoreXY Machines Wed, 28 Jan 2015 22:20:31 -0500 https://reprap.org/forum/read.php?397,454488,462133#msg-462133 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462133#msg-462133 Zavashier CoreXY Machines Wed, 28 Jan 2015 15:15:02 -0500 https://reprap.org/forum/read.php?397,454488,462111#msg-462111 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,462111#msg-462111 Work still in progress (i'm slow…)
The geometry is very good, very happy with those aluminium extrusions :)
Now i'm waiting for the printed parts to finish it !

[attachment 48062 IMG_2810.jpg]]]> tpra CoreXY Machines Wed, 28 Jan 2015 14:31:40 -0500 https://reprap.org/forum/read.php?397,454488,457668#msg-457668 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,457668#msg-457668
I just finished the work on plastic parts. Hope they will be printable !
Actually except for the Bowden and filament placement, everything's setup now in the CAD file

View from top :
[attachment 47460 Capturedcran2015-01-2000.50.10.png]

Printed parts :
[attachment 47461 350871Capturedcran20150119234713.png]]]> tpra CoreXY Machines Mon, 19 Jan 2015 19:09:25 -0500 https://reprap.org/forum/read.php?397,454488,456906#msg-456906 Re: CoreXY / First build https://reprap.org/forum/read.php?397,454488,456906#msg-456906
I can also slide my motors to tension the belts.
The only difference is at my configuration the belts that are attached at the x-carriage are exactly in the middle.

Good luck with the build.]]> gforce1 CoreXY Machines Sun, 18 Jan 2015 06:28:49 -0500