Installation Considerations
2–7
You can adjust the scan beam after the Reader is installed. Online
adjustments can affect the width and location of the scan beam. Use
these adjustments to fine-tune an application, not to compensate for
improper installation. Chapter 6 describes how to make these
adjustments.
•
Scan Angle adjusts the beam width.
Scanner
Optical Scan Angles
➀
2755-SN3
22
_
to 72
_
➁
2755-SN5
20
_
to 50
_
2755-SN8
18
_
to 30
_
➀
Usable scan angle is 80% of the optical scan angle.
➁
Contact your Allen-Bradley representative for availability.
•
Elevation (linear scanning only) adjusts the vertical angle at
which the scan beam exits the Reader.
Elevation can be adjusted
10
_
from center line.
Center Line
3.6 inches
(91 mm)
•
Upper and Lower Raster Angles (raster scanning only) adjusts
the highest and lowest raster angles. The range for each angle is
10 to -10
_
. The lower raster angle must be equal to or less than
the upper raster angle.
Lower Raster Angle
10
_
from center line.
Center Line
Upper Raster Angle
10
_
from center line.
Reader Adjustments
