First thing is for you to post a link to the specification for your motors as that will be necessary to figure out what sort of stepper driver board is required.
You should be aware that most stepper driver boards can make a motor move in half, quarter 1/8th steps so that greater presision may be possible. However if your application suits the use of full steps that is probably best as the motor will have most holding torque at the full step positions.
You should be aware that you may need to align the connection of the motor to the table to make the natural positions of the motor line up with the locations where you want the plate to stop.
The dwell time is a trivial issue for an Arduino program. It can probably do +/- 50 microseconds with ease, and better with a little care
...R