2
4
Compact Photoelectric Sensor
CX-400
SERIES Ver.2
CX-44
□
When using the BGS function
<When a sensing object is moving right or left to the sensor>
BGS/FGS functions
Stability indicator
•
This sensor incorporates BGS/FGS functions. Select
either BGS or FGS function depending on the positions of
the background and sensing object.
• Since the
CX-44□
use a 2-segment photodiode as its
receiving element, and sensing is done based on the
difference in the incident beam angle of the reflected
beam from the sensing object, the output and the
operation indicator (orange) operate according to the
object distance.
Further, the stability indicator (green) shows the margin
to the setting distance.
BGS function
FGS function
• This function is used when the
sensing object contacts the
background or the sensing object is
glossy, etc.
• Please use the FGS function
together with a conveyor or other
background unit.
Distance adjustment
• When this product is used, be sure to carry
out the distance adjustment.
• Since the distance adjuster of this sensor is
a 5-turn adjuster, when the point
A
and
B
is
adjusted as explained in the table right, there
may be more than 1 turn between the point
A
and
B
. Therefore, make sure to remember the
turns of both points to find the optimum position.
•
Be sure to wire the sensing mode selection
input (Pink / 2) before distance adjustment.
If the wiring is done after the distance
adjustment, the sensing area is changed.
• Turn the distance adjuster gradually and lightly with a
“minus” screwdriver (purchase separately). In order to
protect itself, the distance adjuster idles if turned fully.
If the adjuster is idled when distance adjustment is done,
carry out the adjustment again.
• This function is used when the sensing object is
apart from the background.
Sensing
object
Backgroun
d
Sensing
object
Background
Step
Description
Distance
adjuster
1
Turn the distance adjuster fully counterclockwise
to the minimum sensing range position.
(
CX-441□/443□/444□
: 20 mm
0.787 in
approx.,
CX-442□
: 40 mm
1.575 in
approx.)
Turn fully
2
Place an object at the required distance from the
sensor, turn the distance adjuster gradually
clockwise, and find out point
A where the sensor
changes to the detecting condition.
3
Remove the object, turn the adjuster clockwise
further until the sensor goes into the detecting
state again. Once it has entered, turn the
distance adjuster backward until the sensor
returns to the non-detecting condition. This
position is designated as point
B
. When the
sensor does not go into the detecting condition
even if the adjuster is turned fully clockwise, the
position where the adjuster was fully turned is
regarded as the point
B
.
There may be more than 1 turn between point
A and
B
, since this sensor incorporates a
5-turn adjuster.
4
The optimum position to stably detect objects is
the center point between A and
B
.
Optimum
position
When using the FGS function
Others
• Its distance adjuster is mechanically operated. Do not
drop; avoid other shocks.
Step
Description
Distance
adjuster
1
Turn the distance adjuster fully clockwise to the
maximum sensing range position.
(
CX-441□/443□
: 50 mm
1.969 in
approx.,
CX-444□
: 100 mm
3.937 in
approx.,
CX-442□
: 300 mm
11.811 in
approx.)
Turn fully
2
In the state where the sensor detects the
background, turn the distance adjuster gradually
counterclockwise, and find out point
A where
the sensor changes to the non-detecting
condition.
3
Place an object at the required distance from the
sensor, turn the adjuster counterclockwise further
until the sensor goes into the non-detecting
condition again. Once entered, turn the distance
adjuster backward until the sensor returns to the
detecting condition. This position is designated
as point
B
. When the sensor does not go into
the non-detecting condition even if the adjuster is
turned fully counterclockwise, the position where
the adjuster was fully turned is regarded as the
point
B
.
There may be more than 1 turn between point
A and
B
, since this sensor incorporates a
5-turn adjuster.
4
The optimum position to stably detect objects is
the center point between A and
B
.
Optimum
position
• Follow only steps
1
and
2
. Since the sensing point may
change depending on the sensing object, be sure to
check the operation with the actual sensing object.
•
Please use the FGS function together with a conveyor or other background unit.
<When a sensing object is approaching / moving away from the sensor>
PRECAUTIONS FOR PROPER USE
Sensor
Output (operation indicator)
(BGS mode, In case of Detection-ON)
ON (Lights up)
OFF (Lights off)
Lights up
Lights off
Stability indicator
Setting distance
Sensing object
Stable operating condition
Unstable operating condition
Stable operating condition
