3 ms·
Dumb question: Why do you have to replace the ball screw with Acme?
Dumb question: Why do you have to replace the ball screw with Acme?
Without a stepper to hold the torque all the time, ballscrews will creep. The friction is too low.
You could leave the ballscrew and just add a shaft locking clamp, or be fancy and drive it with an actual stepper motor.