Help to find the best combination for CoreXY Machine

Help to find the best combination for CoreXY Machine I am interested in making a COREXY machine, I have several parts of CNC machines that I have not finished putting together, and some special ones for 3D printers, the problem is that I have a lot of mix of things and I do not know how to combine them. My idea is to do something as accurate as possible, since the idea is to print parts to assemble new machines. I was thinking of using rectangular steel tube as main frame, and then MDF to weave the parts on the walls of the machine. After reading several post about 3D printers. I have discovered that the Z axis is very important, which I would like to use a ballscrew with a nema 23 or nema 17 engine. I would use a DM542 driver with the Nema 17 or an AM882 driver if I use nema23. My main doubt falls on the X and Y axis, since I do not have enough linear guides. I have for example a guide type Hiwin MGR12, but I have only 1000mm, so I could use it for example for an X and Y axis, or for the Z axis using 3 cuts of 330mm each. Then I have 3000mm of SBR16 but it does not have as much precision as Hiwin types. Then I have 2000mm of original Hiwin HGR20 but I think it's a lot for a 3D printer. (Although I could use it for the Y axis)! How do I recommend combining the guides? Btw, have too Mk IV-B as head https://reprap.org/forum/read.php?1,743210,743210#msg-743210 Tue, 21 Jul 2026 22:26:51 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,743210,743705#msg-743705 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743705#msg-743705
Make a sweet 1 meter box, though your print size will be less natch. Probably around a 800mm cube, so you can use 4x 400mm square heaters for the bed.]]> prot0typ1cal General Mon, 30 Jan 2017 12:53:21 -0500 https://reprap.org/forum/read.php?1,743210,743361#msg-743361 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743361#msg-743361 dc42 General Sun, 29 Jan 2017 11:05:55 -0500 https://reprap.org/forum/read.php?1,743210,743346#msg-743346 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743346#msg-743346

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dc42
Oh didnt know that, i just see some designs that use ballscrews on Z axis, but looks like you right.

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the_digital_dentist
i didnt think about the heater bed, but in my country i just can find 300x300mm ones i really dont need an big machine, think that 220x220 will be great too

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JamesK
Will search about DD Current build then :) And dont know if a tall design will be great for me, is my first machine, dont know if will find some use for tall parts :/
i Think that hiwin 20 needs preassure (move big weights) to works better :/

thanks all you guys...]]> samsagaz General Sun, 29 Jan 2017 10:17:18 -0500 https://reprap.org/forum/read.php?1,743210,743337#msg-743337 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743337#msg-743337 the_digital_dentist General Sun, 29 Jan 2017 09:41:32 -0500 https://reprap.org/forum/read.php?1,743210,743327#msg-743327 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743327#msg-743327
Take a look at DD's current build log ( [forums.reprap.org] ). In particular, making a tall coreXY is a very efficient way to increase the build volume as the heated build plate is one of the major costs of a large build. However, Z is the slowest axis to print in, so perhaps you don't want to go to extremes on the Z to XY ratio.

Using the 12mm for XY would make sense if your target build volume is modest - 400mm X and 300mm x 2 for Y would work fine. A couple of pieces of the SBR16 would make for a good Z axis, either cantilevered or balanced like DD's. How tall to make it would be very much down to personal preference and expected usage.

If you want to go big things could be much more exciting. Use the 12mm (all of it) for the X axis, cut the SBR16 in half for the Y axis and the 20 in half for Z :)]]> JamesK General Sun, 29 Jan 2017 08:55:40 -0500 https://reprap.org/forum/read.php?1,743210,743325#msg-743325 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743325#msg-743325 MechaBits General Sun, 29 Jan 2017 08:53:23 -0500 https://reprap.org/forum/read.php?1,743210,743313#msg-743313 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743313#msg-743313 the_digital_dentist General Sun, 29 Jan 2017 08:22:00 -0500 https://reprap.org/forum/read.php?1,743210,743229#msg-743229 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743229#msg-743229 dc42 General Sun, 29 Jan 2017 02:35:04 -0500 https://reprap.org/forum/read.php?1,743210,743218#msg-743218 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743218#msg-743218 i have like 5meters in total]]> samsagaz General Sat, 28 Jan 2017 22:39:36 -0500 https://reprap.org/forum/read.php?1,743210,743212#msg-743212 Re: Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743212#msg-743212 MechaBits General Sat, 28 Jan 2017 21:01:46 -0500 https://reprap.org/forum/read.php?1,743210,743210#msg-743210 Help to find the best combination for CoreXY Machine https://reprap.org/forum/read.php?1,743210,743210#msg-743210
My idea is to do something as accurate as possible, since the idea is to print parts to assemble new machines.

I was thinking of using rectangular steel tube as main frame, and then MDF to weave the parts on the walls of the machine.

After reading several post about 3D printers. I have discovered that the Z axis is very important, which I would like to use a ballscrew with a nema 23 or nema 17 engine. I would use a DM542 driver with the Nema 17 or an AM882 driver if I use nema23.

My main doubt falls on the X and Y axis, since I do not have enough linear guides.

I have for example a guide type Hiwin MGR12, but I have only 1000mm, so I could use it for example for an X and Y axis, or for the Z axis using 3 cuts of 330mm each.

Then I have 3000mm of SBR16 but it does not have as much precision as Hiwin types.

Then I have 2000mm of original Hiwin HGR20 but I think it's a lot for a 3D printer. (Although I could use it for the Y axis)!

How do I recommend combining the guides?

Btw, have too Mk IV-B as head]]> samsagaz General Sat, 28 Jan 2017 20:22:08 -0500