13
SA1E-L Miniature Laser Photoelectric Switches (Built-in Amplifier)
Indicator and Output Operation
(Through-beam/Polarized Retroreflective)
Stable LED (green)
Operation LED (yellow)
Sensitivity Control
Operation Mode Switch
•
The operation LED turns on (yellow) when the control output is
on.
•
The stable LED turns on (green) either at stable incident or stable
interruption. Make sure to use the photoelectric switch after the
stable operation is ensured.
•
In the light ON operation, the output turns on when the receiving
light intensity level is 1.0 or over as shown below.
•
In the dark-ON operation, the output turns on when the receiving
light intensity level is 1.0 or less as shown below.
Receiving Light
Intensity Level
Light
Receiving
Status
Stable
LED
(green)
Operation LED (yellow)/
Control Output
Light ON
Dark ON
Operation
Level
1.3 and
over
Stable
Incident
ON
ON
OFF
1.0
Unstable
Incident
OFF
Unstable
Interruption
OFF
ON
0.7 and
below
Stable
Interruption
ON
Optical Axis Alignment (Light ON)
Through-beam
Fasten the receiver temporarily. Place the projector to face the
receiver. Move the projector up, down, right and left to find the
range where the operation LED turns on. Fasten the projector in
the middle of the range. Next, move the receiver up, down, right
and left in the same manner and fasten in the middle of the range
where the operation LED turns on. Make sure that stable LED turns
on at stable incident and stable interruption.
Polarized Retroreflective
Install the reflector perpendicularly to the optical axis. Move the
SA1E-L photoelectric switch up, down, right and left to find the
range where the operation LED turns on. Fasten the switch in the
middle of the range. Make sure that stable LED turns on at stable
incident and stable interruption. When installing the reflector
near the photoelectric switch, adjust the angle and positions of
photoelectric switch and reflector so that sensing objects can be
detected reliably.
Background Suppression (BGS)
Place the SA1E-L photoelectric switch where the switch can
detect the object. Move the switch up, down, right and left to find
the range where the operation LED tuns on. Fasten the switch in
the middle of the range. Make sure that stable LED turns on at
stable incident and stable interruption.
Sensitivity Adjustment
(Through-beam/Polarized Retroreflective)
•
Referring to the table below, adjust the sensitivity of the SA1E-
L photoelectric switch when necessary, in such cases as the
through-beam is used to detect small or translucent objects. The
table explains the status of operation LED when the operation
mode is set to light ON.
Step
Photoelectric
Switch Status
Sensitivity
Control
Adjusting Procedure
1
Receiving light
•
Through-beam,
polarized
retroreflective:
No object
detected
A
Min.
Max.
Turn the control counter-
clockwise to the mini-
mum. Then turn clock wise
until the operation LED
turns on (turns off with
dark ON type) (point A).
2
Light is interrupted
•
Through-beam,
polarized
retroreflective:
Object detected
B
Min.
A
Max.
At interruption status,
turn the control clock wise
from point A, until the
operation LED turns on
(turns off with dark ON
type) (point B).
If the operation LED
does not turn on (turn off
with dark ON type) even
though the control has
reached the maxi mum,
set the maximum position
as point B.
3
—
B
C
Max.
Min.
A
Set the middle point
between point A and B as
point C.
•
After adjusting the sensitivity, make sure that stable LED turns on
at stable incident and stable interruption. For detecting objects
too small to turn on the stable LED, use an optional slit.
•
Sensitivity is set to the maximum at the factory before shipment.
When adjusting the sensitivity, use the screwdriver supplied with
the SA1E-L photoelectric switch to turn the control as shown
below, to a torque of 0.05 N·m maximum.
Adjustment of Sensing Range for
Background Sup pression (BGS)
•
When adjusting the sensing range, follow the instruction below.
Step Distance Control
Adjusting Procedure
1
A
Install the photoelectric switch and the object
firmly. Turn the control counterclockwise until
the operation LED turns off (turns on with dark
ON type). From this point, turn the con trol
clockwise until the operation LED turns on
(turns off with dark ON type) (point A).
2
B
A
Remove the object, and confirm that the
operation LED turns off (turns on with dark
ON type). Turn the control clockwise until the
operation LED turns on (detecting the back-
ground) (turns off with dark ON type) (point B).
(Note 1)
3
B
C
A
Set the middle point between point A and B as
point C. (Note 2)
Note 1: When the background is far off and not detected, turn the
control 360°, and set the point as point C.
Note 2: Because the control is multi-turn, it may take more than
one turn to move from point A to point B.
•
Turning the control clockwise lengthens the sensing dis tance.
Operation LED (yellow)
Sensing Range Control
(Note 3)
Stable LED (green)
erat n e S t
Instructions
