User`s manual

5-77Reference: The Settings Window
Velocity
The Velocity command adjusts the speed with which the
scanner moves during scanning.
As the scanner processes the image and sends it to the
computer, the scanner is also getting more information
continuously from the moving scanner mechanism. If the
computer cannot store the image data as fast as the scanner
sends it, the scanner mechanism has to stop while the scanner
waits for the computer to catch up. These brief pauses during
scanning sometimes cause the quality of the scan to go down,
and images then appear with blurs or lines running across
them. It is important, then, to select a slower scanning speed.
Slower scanning speeds give better image quality, but Auto is
the recommended setting, as it provides the best balance
between speed and image quality. If your images appear to
have velocity-related problems, try lowering your velocity,
and experiment with different settings until you find the
fastest velocity at which the images are in good quality and
appear to have no lines in them.
To use Velocity:
Click on the More Options tool. When the dialog box comes
up, click on the Velocity box and select your scanning speed.
Important
Sometimes certain scanner models on certain
configurations appear to make noise when scanning.
This could be normal and may be related to the speed
at which the carriage is moving. Changing the velocity
can change the amount of noise or type of sound
made by the scanner. The action of prescanning and
scanning can also generate different noises, but this is
no cause for alarm.