This maybe a stupid question, because i dont use Corel, but does it have a driver or a print option to print on a piece of paper 70" long? Does your cutter come with a cut software that would allow you to set up your workspace, and then import your image into that software? I know my cutter has an option to create a specific print size, but again i have never used Corel for my cutting. I can only assume, as with any other attached printer, if the program does not recognize the printers ability to print at such a large size, and the image is not showing completely on the screen than that is why it is not cutting properly... Good luck and Aloha