Ok – I was curious as to whether you were trying to drive the motor directly. Your driver should be able to accept a signal from just about any one of our digital cards.
There is a complication with using the 6008 for this kind of motor control, however. It’s just that it wasn’t designed for this sort of application. With the output being software timed, you would have 5ms of jitter in your timing of your pulses (as a rough lower bound, depending on the computer you are running this on, since its software timed). Depending on how fast you plan to run your motor, it may not be a big deal. But you most likely won’t be able to get pulses any faster than the 100 to 150 Hz range. And if you do, the jitter may put the steps
If you are interested in a card that is designed for motor control, you might consider looking at the 73xx line. The 733x, 734x, and 735x are the different models, and the last digit is the number of axes the controller supports, such as the 7332. The motion cards will also take care of all of the PID control for you, which will be much more cumbersome if you choose to implement it yourself. If you don’t want to go all the way to one of these, I would at least recommend something with hardware timed digital output, such as the 6218.
