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9
TEACHING MODE
2-point teaching
2-point teaching is the most common teaching method and means the
threshold value is taught using two points that correspond to the object
present and object absent conditions.
Step
Description
1
Set the fiber within the sensing range.
Briefly press <MODE> to switch to TEACH mode.
2
Briefly press the jog switch in the object present
condition.
If teaching is accepted, the digital display blinks
briefly showing the detected incident light intensity and the
TEACH mode indicator blinks.
3
Briefly press the jog switch in the object absent con-
dition.
If the teaching is accepted, the digital display blinks
briefly showing the detected incident light intensity.
4
The threshold value is set half way between the incident light
intensities in the object present and the object absent condi-
tions.
The judgement for the sensing stability is displayed briefly:
•
: sensing stable.
•
: stable sensing not possible.
5
The threshold value is displayed briefly.
6
The actual incident light intensity appears is displayed and
the setting is complete.
Limit teaching
Limit teaching is used to set the threshold value for the object absent
condition only, i.e. for a stable incident light condition. This method is used
to detect objects in the presence of a background body or to detect small
objects.
Step
Description
1
Set the fiber within the sensing range.
Briefly press <MODE> to switch to TEACH mode.
2
Briefly press the jog switch in the object absent con-
dition.
If teaching is accepted, the digital display blinks
briefly showing the detected incident light intensity
and the TEACH mode indicator blinks.
3
Turn the jog switch to the "+" side or the "-" side to
set the shift for the threshold value.
A comma scrolls from right to left across the display
twice.
4
The judgement for the sensing stability is displayed briefly:
•
: sensing stable.
•
: stable sensing not possible.
5
The threshold value is displayed briefly.
6
The actual incident light intensity is displayed and the setting
is complete.
*1
If the jog switch is turned to the "+" side, the threshold level is shifted to a
value approx. 15% higher than that set when the jog switch was pressed,
yielding lower sensitivity. Use this method for reflective type fibers.
If the jog switch is turned to the "-" side, the threshold level is shifted to a
value approx. 15% lower than that set when the jog switch was pressed,
yielding higher sensitivity. Use this method for thru-beam type fibers.
High
Sensitivity
level
Low
The default shift amount is approx. 15% of the initial value, but you can
change this amount within a range of 0 to 80% in PRO mode. See "PRO
MODE" on page 5.
Full-auto teaching
Full auto-teaching is used when you want to set the threshold value without
stopping the assembly line.
Step
1
2
3
4
5
6
*1
4
OFF
ON
15%
100%
15%
ON
OFF
0
Turn to '+' side
Turn to '-' side
Description
Set the fiber within the sensing range.
Briefly press <MODE> to switch to TEACH mode.
Continuously press the jog switch while the assem-
bly line is moving.
appears as long as you press the jog switch while the
sensor samples the incident light.
Release the jog switch.
If the teaching is accepted, the digital display blinks briefly
showing the threshold value.
The threshold value is set half way between the incident light
intensities in the object present and the object absent condi-
tions.
The judgement for the sensing stability is displayed briefly:
•
: sensing stable.
•
: stable sensing not possible.
The threshold value is displayed briefly.
The actual incident light intensity appears is displayed and
the setting is complete.
Sensitivity level
Sensitivity level
with object absent
Sensitivity level
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