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Corexy with modified z movement

Posted: Fri Jun 16, 2017 5:19 pm
by 33nolan
I've been wanting to build a massive printer that has a build volume of 4x6x5ft and the moving bed in the z axis on a typical corexy couldn't handle the weight of the part. Even if it could would still be rough on the steppers so I was thinking of modifying it to have the XY axis be on a z axis connected in 4 or more locations to move it the XY axis uo and down instead of the bed. Does anyone think this would work or would the tolerances be too great and would I get a crappy print?

Re: Corexy with modified z movement

Posted: Sat Jun 17, 2017 5:49 am
by excellentfrog
That is what the creator of the Voron Core XY has done with his 24"x24"x24" build - a stationary bed with a Z axis that lifts the XY axes: However, it's not nearly as big as you are planning to do.

Re: Corexy with modified z movement

Posted: Sat Jun 17, 2017 10:24 am
by 33nolan
That's exactly what I was thinking! That's a beautiful printer. I think it would scale well as long as the core mechanics were sound. Thanks for those links.

Re: Corexy with modified z movement

Posted: Sun Jun 18, 2017 11:28 pm
by AndreR.
Also the bigrep one https://bigrep.com/bigrep-one/ uses this kind of movement, but only has a build volume of 1x1x1m (about 3ft 3.4") and looks massive (460kg or 1014 pounds).

Re: Corexy with modified z movement

Posted: Mon Jun 19, 2017 5:41 pm
by Tsunamijuan
You probably need to do some calculations on material weights. Figure out what kinda of weights you will see in that volume, not to mention based on the types of printing you do. If your printing just a very large hollow shell obviously that is a very different number than if you where to print something 1ft x 1ft x 1ft and solid infill. It also varied based on filament a good deal.

Alot of the really big print volume guys have moved to the NEMA 23 and in a few cases NEMA 34's. These are gonna handle the heavier weights. Your not gonna be printing at stupid high print speeds on bigger printers anyways. Since Vibration and acceleration related artifacts are often amplified a good deal.

Re: Corexy with modified z movement

Posted: Thu Jun 22, 2017 12:48 am
by 33nolan
Can anyone think of what a printer design would be called? Trying to find more info on it.

Re: Corexy with modified z movement

Posted: Fri Jun 30, 2017 11:46 pm
by 33nolan
If anyone can think of what this style printer is called, that'd bed awesome.

https://www.reddit.com/r/voroncorexy/co ... _upgraded/