Datasheet
6
BGS / FGS functions make even the most challenging settings possible!
The BGS function is best suited for the following case
The FGS function is best suited for the following case
Background not present
When object and background are separated
Background present
When object and background are close together
When the object is glossy or uneven
Not affected if the background
color changes or someone
passes behind the conveyor.
Unaffected by gloss, color
or uneven surfaces when
sensing objects present on
a conveyor belt.
Caution: Please use the FGS function together with a conveyor or other background
unit.
FGS (Foreground suppression) function
The sensor judges that an object is present when no light is
received at position B of the light-receiving element (2-segment
element). Accordingly, even objects that are glossy can be
sensed. This is useful if the object and background are close
together, or if the object being sensed is glossy.
Conveyor Conveyor Conveyor
Light received at
position A
Light is not received
at position B, so an
object is judged to
be present
Light received at
position B
A
Lens
Emitting
element
Object present
For glossy object
Object absent
ON ONOFF
B
OFF in this condition only
ON in all other conditions
Setting
distance
A conveyor or other
back-ground must
be present
( )
BGS (Background suppression) function
The sensor judges that an object is present when light is received
at position A of the light-receiving element (2-segment element).
This is useful if the object and background are far apart. The
distance adjustment method is the same as the conventional
adjustment method for adjustable range reflective type sensors.
Setting distance
ObjectMoving object
in the back
ONOFF
Element B
Element A
Background
Light received at
element B, or
light not received
( )
( )
Light received
at element A
Detects minute objects unaffected by glossy
background objects. Uses FGS function.
Stable sensing even for thin objects. Uses
FGS function.
Not affected by color variations in objects and
background objects. Uses BGS function.
Applications
๎ Small tablet detection ๎ Biscuit detection ๎ Passage con๏ฌ rmation
CX-443
CX-442
CX-441
BGS FGS
18/07/2011