Specifications

COGNEX
Checker
24 VDC
ENCODER PHB−
INPUT 7
INPUT 6
INPUT 5
INPUT 4
INPUT 3
INPUT 2
INPUT 1
TRIGGER
COMM OK
CHECKER
MODULE OK
OUT 7
OUT 6
OUT 5
OUT 4
OUT 3
OUT 2
HS OUT 1
HS OUT 0
I/O COMMON
−
+
ENCODER PHB+
ENCODER PHA−
ENCODER PHA+
24 VDC
+–
1
2
3
4
External Retrain
Requires the I/O Module.
You can configure both Part Finding Sensors and Pattern Sensors to
be retrainable by checking External Retrain in the sensor control
panel.
Whenever Checker receives a signal on the INPUT 7 line through the
Checker I/O Module, Checker retrains any retrainable Part Finding
Sensors and Pattern Sensors using the part of most recently acquired
image that lies within the retrain region.
When External Retrain is enabled for a sensor, the yellow corner
markers indicate the region that is used to retrain the Sensor when
an External Retrain signal is received. Sensors can be retrained in
both Setup mode and in Run mode.
In Setup mode, can manually signal an External Retrain by selecting
Checker->Retrain or pressing F9.
Checker indicates that it has successfully retrained by quickly blinking
its lights twice. If it could not retrain the part, it blinks its lights
slowly three times. You can also configure a Checker output line to
signal when an External Retrain succeeds or fails.

1 Part nding sensor detects part normally.
2 With a new part, the Part Finding Sensor fails.
3 Apply a pulse (minimum 10 ms) on INPUT 7 (External Retrain) line.
4 After retraining, Part Finding Sensor now nds new part.
This example shows Part Finding Sensor being retrained: