Can't side-lay scan


Reason 1:

Low brightness(the red area is not enough to be recognized)



Solution:

Restart calibration software and adjust the gains,until all of the white dots become red(follow this picture)



Reason 2:

High environment light

Solution:

Light is too much strong surround the scanner,try turn off the light,close curtains,back to the light source.


Reason 3:

Dust(the lens or calibration plate was too dirty)

Solution:

Clean the dust on calibration plate or camera lens.