Design have a purpose, resolving an issue or offering something new :

[Adarsh2425]

what is your motivation behind this design ?

I suppose the bed isn't moving at all.

i suppose the 2 hot ends move on X simultaneously.

it seems that the 2 hot end are direct drive, and we do not know where the spools are located.

This design allow some unsolvable wobbliness on the Y.

Where is the stepper motor for the Y movement ?

How do you install the Y belt ?

The bed go under the X rail, and that is useless, the hot end can't go there, so lost printable surface

[Adarsh2425]

so, I want to create an open-source slicing software which must have the ability to handle multiple active tool heads working simultaneously to increase print speed also I wanted my model to have modular y and x axis motion that will be added just by add a single contraption with stepper motor direct driven on that bar end so just i would need to screw one of the end and switch to mode such as dual triple quad so on and on ik this as allot of limitations and i would need to have sufficient I/O ports to drive such thing. but independent y and x axis can overcome a lot of limitations of idex . also, I think it would have an industrial application where 3d printing is actually needed also I like to create print with multi material prints and multi color prints at better speed also i will have more longer print so that would accommodate all of the gantry.

the y axis motion is independent and there is a orange stepper motor at the end of that contraption.

ik it would excellent calibration and this design is mechanical challenging. so, can you give me some advice so that i can improve this design according to modular concept?

[Adarsh2425]

so, I want to create an open-source slicing software which must have the ability to handle multiple active tool heads working simultaneously

I am ignorant on this matter, but can't cura / prusa / or any free slicer already do that ? And you are talking software while presenting hardware.

to increase print speed

the 2 heads works on the same piece or on 2 different pieces ?

-> same piece is very case specific, multiply seams and accumulate problems (ultra precise stepper, since they need to be in perfect synchronicity). The current hardware is far from being compliant with this kind of technical requirement.

-> Different piece is just emulating 2 printers, but you do that by dividing print surface by about 2. It saves space, but I guess this is not the target here.

I wanted my model to have modular y and x axis motion that will be added just by add a single contraption with stepper motor direct driven on that bar end so just i would need to screw one of the end and switch to mode such as dual triple quad so on and on ik this as allot of limitations and i would need to have sufficient I/O ports to drive such thing.

This kind of things may be okay only on huge Pieces, since each new hot end divide the surface once more. Since each "head" had a dead zone around it, and if you add the accumulating errors (Z X Y synchronicity), you end up with an almost impossible machine : and by that i really mean that the prototype may be able to do it, but mass product is barely possible or you will need to calibrate EVERY machine individually like you did on the prototype (you can't expect the client to do it as good as you).

Think it this way : instead of a very delicate and demanding machine, to make 4 pieces, the client will prefer having 4 machines or wait 4 times instead of your system because it is less expensive (for the waiting) or more reliable (on the 4 different machines, if one shut down, you have 3 left)

I say it because people will think that way : cost and/or reliability.

independent y and x axis can overcome a lot of limitations of idex

I do not understand this sentence. i tried to google "idex" for no results.

I think it would have an industrial application where 3d printing is actually needed

Like any 3D printer, really but okay on this one.

I like to create print with multi material prints and multi color prints at better speed also i will have more longer print so that would accommodate all of the gantry.

So speed is the main thing here. You choose multi head instead of simple print speed, and you want multimaterial at the same time.

I have a saying in my country, and it translates roughly by "well done and fast do not go together", meaning you could have been faster but not so well done, or it could have been better but slower.

[Adarsh2425]

so when i said multi color or multi material print I mean it will be possible this printer both the head will be on a single z axis support and i was thing if i am already thinking of having a custom processing unit i will have ultra sound sensor to show bed leveling error or also using some commands to adjust it. and about frame i think so this much support is not enough but i dont want to add another side with support cuz then it won't be modular even if i add support i will need another stepper motor to change the z axis of the other side. search idex 3d printer it is a dual print 3d printer. for industrial applications this design can work efficiently be change when there r some issues so if someone will design another motor for z axis motion of like 5-6 cm and it must be a small contraption it will be very easy to print figures multi color anything imagine a 3d printer with 1 side motion in y-axis continues also in bio medical use in labs need multi martials to create skin or and other organic tissues and if this software works we will have to use different printhead for differet types of tissues and this design will make it possible