had this link a while and thought it was time to pop it up, its the clearest explanation of the cutter offset values, and might help anyone setting up their cutter
http://vinylcutterfaq.com/techniques.html this link is now dead
http://www.graphteccorp.com/support/...lade_Setup.pdf
try this one, just read to the bottom and ignore the blade set up if you are on a different cutter