Casio IT-800 Series, Software Manual

Page: 51 / 325

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2.2.6 Expanded Features
Scan Width Control
If the laser emits on several bar codes located near each other, scanning may fail. By narrowing
the laser beam emission width, scanning can be focused onto only one bar code, not onto the other
one located near by. The laser beam emission width can be set to one of the four modes as shown
in following figure. The Laser Scanner Library can be used to set it. The default is “No control on
laser beam emission width”.
•
No control on laser beam emission width (default)
•
Wide
•
Standard
•
Narrow
Figure 2-6
The setting values are stored in EEPROM, and read out at time of resetting. Laser calibration (see
note below) adjusts each setting value for the laser beam emission width. The setting values
adjusted must be registered in the registry. The values in the registry will have the priority.
Notes:
•
Each scanner module integrated in the terminal has an individual performance different from
others. To minimize this characteristic difference, the laser calibration must be performed on
each terminal using the dedicated reference bar code.
•
Setting up the scan width control function in one of four modes while the setting gain (see
page 52) is set up in Auto mode may cause a deterioration of scanning bar codes that are
printed in a poor quality. If you need to set up the scan width control function, select the
setting gain in Mode 0 to Mode 3. Or, if you select the setting gain in Auto mode, select the
scan width control function in “No control on laser beam emission width” mode only.
The functions of the Laser Scanner Library relevant to the “Scan Width Control” are as follows.
OBRSetSwingAngle
:
Sets up swing angle control mode.
OBRGetSwingAngle
:
Retrieves the status of swing angle control mode.
照射幅制御なし
No laser width control
No control
Wide
Standard
Narrow