KEYENCE BL-700 Series - Manual (Page 38)

Chapter 2 Connection and Installation
2
24
LASER ON
STB
OK/NG
TIMING
TEST
BL-700
LASER ON
STB
OK/NG
TIMING
TEST
BL-700
Optical pickup
Light source
Object
Bar code
• Bar code pitch
Do not place several bar codes in the field of the laser beam, unless you are in
multi-label read mode (Multi 3).
If you use multi-label read mode (multi 3), the BL-700 can simultaneously read 2 to
4 bar codes in the field of the laser beam.
• Influence from photoelectric sensor
When using a photoelectric sensor to control trigger, block the sensor beam so it
does not enter the BL-700 optical pickup.
The beam from the photoelectric sensor can interfere with the BL-700, deteriorating
reading performance. If this case, reposition the photoelectric sensor.
• Interference between the BL-700 units
When two BL-700 units are placed adjacent to each other with only a small separa-
tion, the mutual laser beams result in interference and will cause a readout error.
To avoid interference, place the units as far apart as possible.
• When a bar code is stained or partially missing
Use a raster scan reader (BL-701/741/781) when a bar code is stained or partially
missing. This raster scan readers scan several portions of the bar code. Normal
portions of the bar code, even with stained or missing portions, can be read by the
BL-700.