CoreXY questions

Hello everyone. I have started thinking about building my new machine with CoreXY kinematics, and build volume 400x400x400mm. I am thiking about box frame made out of 2020 aluminum extrusions.
Estimated frame box size would be 600x600x600mm or so. I will be using bowden extruder, Hiwin MGN12 rails and carriages for motion.

My main question would be if the frame is sturdy enough for my machine? Or should i go straight to 4040 or 2040 extrusions?
Thanks

I would suggest using 3030. It'll quite a bit stiffer.

At a minimum, use 2040 for the beams that need it.

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Hi,

You'll probably want to upsize the rails at last to 2040 profile
which will brings a lot of lateral stability.
Maybe you can keep the 2020 for the stiles.

++JM

I have build an corexy using 20x20, the size of the printer is 40x40x52 cm. I have used 4 bars 20x20 for each side, two of this bars are very close of the corexy mechanism. Was result the structure of the printer is very rigid and i can say is overkill. For your case it will sure work very well.

You can use 20x40 instead of 2 bars 20x20 , the price will be almost the same. The price of 20x40 is a lot more of the 20x20 but you need less connectors. But both solutions will work.

Quote
filipeCampos
I have build an corexy using 20x20, the size of the printer is 40x40x52 cm. I have used 4 bars 20x20 for each side, two of this bars are very close of the corexy mechanism. Was result the structure of the printer is very rigid and i can say is overkill. For your case it will sure work very well.

You can use 20x40 instead of 2 bars 20x20 , the price will be almost the same. The price of 20x40 is a lot more of the 20x20 but you need less connectors. But both solutions will work.

Can you share a pic of your machine?

Quote
Capinho

Quote
filipeCampos
I have build an corexy using 20x20, the size of the printer is 40x40x52 cm. I have used 4 bars 20x20 for each side, two of this bars are very close of the corexy mechanism. Was result the structure of the printer is very rigid and i can say is overkill. For your case it will sure work very well.

You can use 20x40 instead of 2 bars 20x20 , the price will be almost the same. The price of 20x40 is a lot more of the 20x20 but you need less connectors. But both solutions will work.

Can you share a pic of your machine?

All the info you need is where:
[www.thingiverse.com]

That human sized printer looks to be made from the same 2020 profiles as the small ones: [www.youtube.com] I do not know if its rigid enough but they seem to be moving it around to expos. And it seems that they are even using printed brackets to connect the extrusions and that would be the weak point.

Edited 1 time(s). Last edit at 09/25/2015 08:10PM by Edvardas.