I AM USING A XYLOTEX 3 AXIS BOARD AND WANT TO ADD ANOTHER MOTOR SLAVED THE X-AXIS. WILL DRIVE CW230 WORK?

If the pins from the terminal block on the side of the board are outputs, or at least 2 of them are outputs, then you can connect our modular driver to the board (example: cw230). If they are all inputs, then you would not be able to connect an external driver.