Datalogic Scanning DS6400 - Manual (Page 19)

INTRODUCTION
1
1.3 OSCILLATING MIRROR MODELS
Oscillating mirror models are used when coverage of a large reading area is required, mainly
in picket fence applications.
The DS6400 scanner mounts a dedicated optic head with integrated oscillating mirror driven
by a linear motor. The speed, the precision, the repeatability, and the reliability of this driving
technology assure high level performance.
The new oscillating mirror is completely software controlled and software programmable. The
Genius™ software tool allows adjusting the linear motor speed (oscillating frequency) and
the upper and lower limits of the oscillation by defining the top and bottom line limit angles.
When the oscillating mirror is programmed to read barcode labels at very small angles,
position the reader to assure at least 10° for the Skew angle (see par. 2.4). This angle refers
to the most inclined or external laser line, so that all other laser lines assure more than 10°
Skew. This avoids the direct reflection of the laser light emitted by the reader.
10
°
Figure 1 – Oscillating Mirror Skew Angle
Otherwise, the scanner can be mounted at an angle of inclination of 17.5° in order to attain
symmetrical deflection ranges.
3
17.5°
10
7.
5°
Figure 2 - Oscillating Mirror Reading Position
In the above case, the zone where the scan line is perpendicular to the reflecting surface
corresponds to a neutral zone at the center of the reading field.