Received the X and Y axis stepper stages today, have begun modeling the microscope in a basic way to figure out where to mount the focus motor and X/Y motors.

I should be able to wire up the 3 stepper motors to an Arduino with Grbl in the next day or so to get the steps per mm and thus positioning resolution, and will start working the slide holder mechanism.

I've completed modeling an adapter between the stepper motor and Lego wheel, I will 3D print this part to check fitment to the stepper motor and set/mounting screws. Lego parts should arrive later this week.

Specs for the Y-axis motor are as follows:

Motor diameter: 10mm

Motor length: 10mm

Length of rod: 36mm

Slide stroke: 33mm

Winding resistance: 54 ±1 Ω

Step angle: 18°

Drive voltage/current: DC 4-6V / 100-300mA

Specs for the X-axis motor are as follows:

Driving voltage: DC 4-5V
Screw length: 73mm
Slide stroke: 63mm
Screw pitch: 3mm
Step Angle: 18°
Stage size: 90 * 30mm

Specs for the Z-axis motor are found here: http://robocraft.ru/files/datasheet/28BYJ-48.pdf