hello CES,
you have to tell us more about your installion (Motor , Motor Connection, Gear, Belt driven, drirectly driven by Ball screw),
because you data for the Z-axis are very strange.
steps per:10000 ?? are you running a servo Motor on z-axis?
velocity 15inch/min ok i have to calculate (15x25.4 = 381mm/min, i am in metric) that is nothing
this data "seems" to be a Little bit "strange".
TPS