Currently, I'm trying to figure out how to upgrade the motors on an old Multicam to a closed-loop NEMA 34 (?) Current motors are shown (8 wires out).
I'm stuck in the fact that the x motor has the motor shaft on both sides of the motor driving both rack and pinion on both sides of the gantry with a shaft connecting them, connecting with couplers from shaft to motor. The motor drives a 20/60 toothed gear and belt both sides of the gantry.
Y and z are similar in regards that the y is controlled with a 20/60 belted gear but z is a smaller motor gear driven to a ball screw.

Issues are
The size of motor(s) to fit in these spaces
Closed-loop don't have shafts going all the way through?
Stepper on both sides of X required?
Space for z motor as it's smaller?

Any options or advice is very welcome.
Link to picture album

Multicam motors https://imgur.com/gallery/RaqcppZ