Oh, and also, if you have all of this space and a tall structure anyway... you might as well make the Z axis taller. It's only a couple bucks more to step up to 400, 450, 500, or 550 linear rails.
Hey man first of all thanks for answering i will answer your question separately
>Can you explain your motivation behind doing this as the tower?
i think this is the one hardest to answer, at first i want to re utilize the 4040 profiles that i have, i gave up on that decided to do an enclosure for my cr-10s pro, then i saw that i would need to do ton of work, and would not make a reliable printer, then i decided to see if it would be possible to do a voron 500x500x500, then i gave up on that as i am not sure how much more motor and which type of rails i should use, i almost decided for mgn20 for the sides, as it would fit perfectly, i am glad that i choose mgn12, as this profile has a guide of 10.2 mm, and the mgn12 is exaclty 10mm, so it will fit nicely on the Z profiles. anyway, i decided to do it, because i wanted a printer that was easily movable, with a better structure, so i wish to get a bit better speeds even, if i may lose some because of the casters. so yeah this answer is not clear, maybe because i can haha
>I think you will find that caster wheels, with a moving mass so high up, is going to be a nightmare. The machine will literally walk itself across the room if you aren't careful.
i definitely agree with you on that, my idea is to attach it to an wall in some way, or another machine that is also on 4040, but this attachment would be easily removed, so i could move to another place or even make it easier to make fixes, like move it a little bit and i have access to all sides.
>Structurally, I think you might be better off with the vertical extrusions going clear through, instead of being in three separate sections. That would also avoid stack-ups of length errors. But you would hate yourself wiring it if it wasn't modular.
i thought in doing that it would be possible as the bars i have access to have 3 meters, however, i did help my friend build a few of these, and this was the easier way to build then and they are quite stable, i put like double of 90 degree corners on this project that i had on others here, so i am almost sure it will be stable enough.
>The tower seems to also be a bit of a missed opportunity. If the lower cross pieces were down by the wheels, then you could install a shelf and additional doors and use that area for storage. The same goes for the top - it would make a useful storage space if additional bracing was made for a solid floor.
the project is completely parametric, i just need to change a number from 200, to 40, and the lower section will be together with the wheels, and yes, the idea later on is too have the under part to become a cabinet or a dry section for keeping filaments and/or tools. i just decided on 600 mm of high because with experience is a nice high, it would be possible to do 2 and maybe 3 vorons too, but i don't think they fighting each other over frequency would be nice, the top part is for filament and maybe a enraged rabbit in the future.
>You would also want to add some kind of provision for leveling. Floors are quite often not perfect, but three points define a plane, so at least one foot would need some adjustability. If this isn't done, or you don't shim it under the wheel, then the frame will be inclined to settle - putting a twist across the whole machine.
the idea is to semi-fix it to something over time, but it's a problem that i am fighting over haha
>Oh, and also, if you have all of this space and a tall structure anyway... you might as well make the Z axis taller. It's only a couple bucks more to step up to 400, 450, 500, or 550 linear rails.
i thought in doing that, but sincerely for experience of design tens of projects, it's more often than not i miss horizontal space never vertical, most things on vertical are not strong anyway because the way the lines work, so i would be a happy man with 500x500x200 mm printer, i would be adding space to high that i personally never use.
also enjoying that you already answer me, while i am reviewing my work and starting the buy list, i saw that i made some mistake, and my build volume is 290x350x320, on a 350x350x350 expected build volume
it will be easy to fix as it's parametric, but what i should aim for for real nozzle movement, can i go to 400x400x400, or that would make my printer to slow, i want a faster printer and i believe that the 4040 might bring me some stability to try somethings faster, i want some leeway for mods like cleaning nozzles in the future but i don't want to lose on the speed, how much more movement space can i add to the printer ? 20-50 mm ?