To make the calibration sheet Imagine a standard ruled sheet of paper, starting 1/3 of the way down, you will need 8 shades of grey to get from the white to the black. The lightest shade first and each shade darker should fill one standard [light blue] ruled line. the final black line should fill three lines worth (going toward the bottom of the page. Use a paint program to create the calibration page. scan very slow and even. try 30 or 45 0r 60 seconds. Sometimes it goes easy, sometimes it goes difficult. Reboot between tries. Good Luck to you.