Hi, i'm doing a very similar project. Can you tell me which printer/microc you eventaully picked? and what was the outcome of the projecT?

 

The thread you posted in (hijacked) is a year and a half old, so the OP has long since gone - http://forum.allaboutcircuits.com/showthread.php?t=10894

Every printer comes with completer information as to control codes. Printing is a matter of sending ASCII codes. The big decision is the type of interface.