I don't know what torque you need to move the Bridgeport but

looking at the kit you linked to

the motors 8mH inductance is too high when using the 60V power supply supplied

you either need to have a motor inductance about 3.5mH to use the 60V supply or
stepper drivers that will work with a 90V power supply if you use the 8mH motors

I would use another breakout board that does not have opto-isolators on the outputs connected to the stepper drivers

connecting the KITs BOB to stepper drivers with opto-isolated inputs will degrade the sharp edges of the step pulses

John