How can I control a revolute joint with a stepper motor ?

Hello, I want to control a stage which is actuated by a lead screw and stepper motor. Ideally, I need to specify the velocity of the stage or angular velocity of the rotational joint 1 so that it rotates the screw. I used simscape to generate the block diagram from my CAD model from onshape (link below). Is there any way of doing this ? I have tried using the stepper motor model from the simelectronics library but had trouble connecting it to the joint.

Simscape model: https://drive.google.com/open?id=1WBuGkkchPfXhgrx0C9gV4moEqcxCi6hq

CAD model: https://cad.onshape.com/documents/d5ee5d8b466e6650b9cfdac4/w/b05ebd7e69bda94f37ce5c0e/e/71f3ef6f9e38afb071c64dfd

Thank you

[Birdman]

Without feedback, you can not control anything, man. It will be an open loop system.

[Georges Nomicos]

I have updated my answer, hope it is clearer.

Answer 1

[Shammah Benjamin]

Did you fix your issue, I am also trying but in vain, to control a revolute joint with a stepper motor

Answer 2

[Hamza]

I have the same issue. Did you guys find any solution?