Vista Sensors and Motors.pdf - 第9页

SENSORS AND MOTORS OPTO SENSORS Chapter Issue 1 Sep 02 Technical Reference Manual 20.9 2. Short out the opto . 3. Check that the rele vant Multi Move LED is illuminated or that the NextMove pin breakout is 0V to confirm,…

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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
SENSORS AND MOTORS
OPTO SENSORS
20.10 Technical Reference Manual Chapter Issue 1 Sep 02
Refractive Type
Opto
The Refractive Type Opto sensor is used in applications when checking liquid
levels. The opto works by the refraction of light from an internal LED through
the liquid being sensed, ie solvent cleaning fluid.
Fitted to the underscreen cleaner solvent tank the opto is used to detect when
the liquid solvent falls below the set level.
Figure 20-8 Refractive Type Opto (Liquid Level)
Through Beam
Optos
The types of through beam opto used on this machine are:
• Fork Sensor Type
• Long Throw Type
• Counter Type
Fork Sensor Type The through beam fork sensor transmits a beam across the gap in the opto.
When a vane enters the gap the beam is broken and the sensors output
transistor is switched on.
Solvent Low Sensor
Liquid Level
Red - +12 V
Green - Sig
Black - 0 V
MultiMove Digital Input
V+ (User)
Opto-isolator
2K
0V (User)
0V
12V
Signal
12V
0V
Control
Circuit