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SENSORS AND MOTORS OPTO SENSORS 20.8 Technical Reference Manual Chapter Issue 1 Sep 02 The beam of l ight, whi ch is cont inuously on , is accur ately focused and i s able to dist inguish b etween the t arget and object …

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SENSORS AND MOTORS
OPTO SENSORS
Chapter Issue 1 Sep 02 Technical Reference Manual 20.7
Setting Up
Procedure
The procedure for setting up the diffuse optos (board at left and board at right
sensors) is fully detailed in the Rail System chapter of this manual (Adjustments
and Settings - Board at Left/Right Optos).
Testing Procedure If the sensor fails to operate:
1. Disconnect the diffuse opto.
2. Short out Pins 2 and 3 on the socket.
3. Check that the relevant NextMove LED is illuminated or that the pin breakout
is 0V to confirm, or otherwise, that the sensor is defective.
Background
Suppressed Opto
The background suppressed opto sensor is a diffuse type sensor. The sensor
incorporates a background suppression capability and a potentiometer for
precisely adjusting the sensing distance.
The opto emits a pulsed red light which is reflected by a target when it enters
the sensing distance, not only sensing the reflected light but also the distance
of the object to the sensor.
When the beam of light hits the board or screen, some of the diffused light is
reflected back and the sensor NPN transistor output state is switched ON.
SENSORS AND MOTORS
OPTO SENSORS
20.8 Technical Reference Manual Chapter Issue 1 Sep 02
The beam of light, which is continuously on, is accurately focused and is able
to distinguish between the target and objects outside the scan range.
Figure 20-6 Background Suppressed Opto
Setting Up
Procedure
The procedure for setting up the camera, background suppressed opto is fully
detailed in the Camera and Vision Chapter of this manual (Adjustments and
Settings - Board at Stop Sensor).
The procedure for setting up the remote board stop, background suppressed
opto is fully detailed in the Rising Table Chapter of this manual (Adjustments
and Settings - Board at Stop Sensor).
Testing Procedure If the sensor fails to operate carry out the following:
1. Disconnect the opto.
NextMove Digital Input
V+ (User)
NPN
Opto-isolator
2K
0V (User)
Pin 1 12V
Pin 3 0V
Pin 2 Signal
12V
0V
Control
Circuit
View on Arrow A
Sensitivity/Focal Length
Adjustment
Red LED - Target Detected
Background Suppressed Opto
Emitter/Receiver
A
SENSORS AND MOTORS
OPTO SENSORS
Chapter Issue 1 Sep 02 Technical Reference Manual 20.9
2. Short out the opto.
3. Check that the relevant MultiMove LED is illuminated or that the NextMove
pin breakout is 0V to confirm, or otherwise, that the sensor is defective.
Figure 20-7 Voltage Diagram
Board
Absent
Present
Absent
12V
0V
On OnOff
Red LED
Signal