Electric Mini-Motor Design

That's a surprising amount of torque to get out of such small motors. Are you sure this is achievable?

What speed must the plate achieve? 

In a perfect world, I would like to have the plate move across the 6 feet distance in less then 5 seconds.

How is your plate guided? Why do you want to use 2 motors in parallel? Which is the acceleration time you accept (acceleration could disturb what you have on the plate)? Is speed during the travel important (constant on a longer part of travel or can it be variable?) ? Do you always have same travel or different?

The power you will need depends on friction and acceleration + the force the plate has to exercise if required.

I do not know if AC motors of such dimensions are available but you can find by MAXON a broad choice of DC high density power motors with ALL what you need for your transmissions (gear boxes, encoders,electronics, aso).

I agree with NickName... Dc motors are the way to go.
(But I can't be bothered to justify this assertion..., lazy baaad kitty)
Del

Thank you for sharing. What will new tool do? Can we see it's picture when finished??