View topic – HOWTO get help with your arduino project • adafruit industries • Customer Support Forums, DIY Electronics, Open Source Hardware, Arduino.

Stepper Motor Quickstart Guide – SparkFun Electronics.

First steps. Can you control the motor on your scanner? Easydriver boards are a DIY standard approach to solving the control task.
This linked tutorial gives specifics about setting up and testing the easydriver.

Another reference source for using the EasyDriver is bildr blog