Rockwell Automation 2755 AdaptaScan Software - Manual (Page 80)

5–6
Publication 2755-838
Focus
The scanner dialogs provide a focus option.
Focus Setting
Preset Focus
Four preset read ranges allow for easy replacement of an existing
scanner. See Appendix B for read ranges.
Manual Focus
Manual adjustment of the read range is available in increments of 10
units (0 to 255 units) using the spinner controls or a value can be
typed in. Manual focus provides a trial and error process for finding
the best performance for a given application.
Autofocus
This feature automatically adjusts the scan beam focal distance for
the best margin for the symbol appearing at a fixed position. When
focus is initiated, the Reader continuously adjusts the focal distance
as a symbol is scanned (from minimum to maximum). The Reader
displays and records the margin at each focal length. The focus is set
at the point two-thirds of the way between the minimum and
maximum acceptable focus range units.
Focus Options