It sounds like you have the wrong paper or it is not inserted correctly. You should be using thermal paper. If you check the paper carefully, it will have a shiny side and a rough side. The shiny side must face the front when coming out of the machine or you will get blank paper feeding out.
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If anyone needs a manual for the royal Alpha 583cx cash register, one of the users has it here:
http://the-checkout-tech.com/manuals/cashregisters/Royal_Alpha-583cx_instruction_programming_manual.html
Registerman, April 2013