Hi folkertverdorn,
If you have turned on the option to calibrate for every scan and you are still getting the issue after several scans, it looks like there is a hardware issue or a communication problem.
In this situation, you can try a new USB cable and/or a different port on your computer. I would avoid any USB hubs or extensions and use a port directly on the computer. To see if I can assist further, I would need some additional information. If you could reply to the message with the information below.
- What version of the Mac or Windows operating system are you using on the computer?
- Do you get any errors when scanning?
- Is the scanner connected directly to the computer?
