Arduino Stepper Motor

This is a project I'm working on to build a machinist dividing head which will be electronically controlled by an Arduino Duemilanove. Covering the Arduino is a Sainsmart LCD / Keypad which provides a 2 line x 16 character LCD and 5 input keys plus reset. On the right is a 12 volt, 0.5 amp stepper motor with 48 steps per rotation. Between the stepper and the arduino is a Pololu bipolar stepper driver. This allows the arduino to provide simple step and direction signals and takes care of energizing the motor windings to get the proper movement, direction, and holding power when not moving. Ultimately, this stepper will be added onto a dividing head spindle with a 60 tooth worm gear which will give it a gear ratio of 60 to 1. This will increase the resolution of the stepper from 48 steps to 2880 steps which increasing the torque as well as the holding power when stopped. The arduino is programmed by a free IDE which runs on a PC and is downloads the compiled program to the Arduino. Once downloaded, the Arduino can be powered by a separate power source and doesn't need to be tethered to the PC.