I have a ballscrew with a 16mm per turn lead. Driving with a 200 step motor, what would be a good reduction ratio for the belt drive?
Motor is a nema slo-syn, M093-FD11
Fast screw to use on a lathe Z axis but it was inexpensive surplus old Star Linear actuator. Still tight despite being 18 years old.

Is there a site where the screw lead (inch or mm) can be entered with the desired linear move per motor rotation to get the reduction or increase ratio?