Interesting concept for sure.
But it looks like it may be an inertia nightmare with that large wheels in the air.
I'm assuming you calculated the required torque, and those belt ratios are the reason for them being so big.
But I think going back to NEMA 17's and reducing the size of those wheels would be a better 'first attempt' at the concept.
EDIT: Thinking about it even more, considering the distance traveled, you could leave the motors at the bottom, get rid of the wheel and betls, and run a threaded rod up to arm.
You could then go back to NEMA 14's, and since it's a screw you get the torque back.
But it looks like it may be an inertia nightmare with that large wheels in the air.
I'm assuming you calculated the required torque, and those belt ratios are the reason for them being so big.
But I think going back to NEMA 17's and reducing the size of those wheels would be a better 'first attempt' at the concept.
EDIT: Thinking about it even more, considering the distance traveled, you could leave the motors at the bottom, get rid of the wheel and betls, and run a threaded rod up to arm.
You could then go back to NEMA 14's, and since it's a screw you get the torque back.
