#2d Printer inside of the V-core 3.1
scarlet rockBOT
pastel smelt
I am not understanding why it has to be part of the bed. Can't you do another set of corexy motion on the bottom of the machine (thus having the exact same size as the corexy motion on the top)? Since you are only printing in x and y (and not z) the bed can be stationary right?
cold thorn
The printing is indeed 2D, but the bed still needs to move in z while printing sometimes (blt touch, start a new line,...). The field outside a magnet significantly decreases with every mm no matter what design. So this way the (safety) distance is minimal if it is one piece.
pastel smelt
The printing is indeed 2D, but the bed still needs to move in z while printing s...
But those aren't printing moves, so you won't have the bottom magnet thing engaged at that time right?
So it wouldn't matter if it isn't close to the bed
torpid crypt
Bed can't be stationary since the printhead does need to move away from it for the listed reasons. Which means the magnet would need to move down as well. Could either mount the whole secondary corexy system to the bed itself, or have the magnet drop down then move back up for the limited amount of z-travel the top printhead needs.
but that means if the amount of z-travel changes you'd need to remount the secondary system lower down, instead of it just following along. The three stock z-screws are plenty strong enough to lift the whole assembly.
One worry I have is that if your bed is thin enough for the magnet to work through it, will that be strong enough to undermount the second assembly. Maybe have a thicker frame and a thinner print area?
torpid crypt
each of the screws is quite strong. I screwed up and didn't place my steel print sheet down and tried to home with inductive probe
It tried to push up so hard that despite the large mehanical disadvantage it broke the top bearing holder in the front left off
cold thorn
What do you guys think is the best way to make the magnet move in sync with the nozzle while printing, after we build it? Will this be doable with the same gt2 belt routing, motors, idler sizes,...as the vcore3?
torpid crypt
I'd read through the klipper documentation. I'm betting that setting the "under motors" similar to how the vcore hybrid does it will get you there, along with some additional homing macros
the same belt routing motors etc should be fine
maybe look at having the magnet rest on a PTFE sheet so it just slides around?
cold thorn
Thank you
cold thorn
CoreXY inside of the V-core 3.1