Datalogic Matrix 120 Reference Manual page 57

INSTALLATION
Matrix 120 is able to decode code labels at a variety of angles; however significant angular
distortion may degrade reading performance.
When mounting Matrix 120, take into consideration these ideal label position angles: Pitch
or Skew 10° to 20° and Tilt 0°.
Note: Since Matrix 120 is omni-directional on the code plane, the Pitch and Skew angles
have the same significance with respect to the code plane. However in some advanced code
reading applications performance can be improved by modifying the Skew angle.
The Pitch, Skew and Tilt angles are represented in Figure 32. Follow the suggestions below
for the best orientation:
Position the reader in order to avoid the direct reflection of the light emitted by the Matrix 120
reader; it is advised to assure at least 10° for the Skew angle.
No Pitch, Tilt
or Skew
In some cases, such as low contrast or low illumination, it can be useful to use a Pitch or
Skew angle = 0°.
The Tilt angle is also represented in Figure 33. Matrix 120 can read labels with any tilt angle.
Keep in mind however, that since linear barcodes are rectangular, the reader should be
aligned to fit them into the horizontal FOV.
Tilt
any angle inside
Pitch
FOV
Minimize
Figure 32 - Code Reading Orientation
Skew
Assure at least 10°
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