I want to share with you some info about a neat steeper driver board we designed, for driving two or four stepper motors (by stacking two boards) using Arduino UNO (& friends). This neat shield can be used for making pan and tilt mechanisms for cameras, small CNCs, 3D printers you name it.
This shield has a free downloadable example software (INO) and a video to demonstrate some of the capabilities. The driver chip used is L6470 from ST Microelectronics, a complex motion controller and microstepping driver, which may be a little bit discouraging, but after understanding how it works, and with the help of software examples it all starts to make sense. Schematics and a datasheet are availble also for download
Please watch the video, feel free to ask questions and leave feedback (I apologize for the bad sound, it was raining....)