Omron L User Manual page 108

Two-point teaching
Performs measurement on two samples and uses the intermediate value of the two
measurement results to set threshold values.
Two-point teaching is useful when you want to detect subtle differences between the
standard sample and defective samples.
Sensor head
Standard
sample
The threshold can be calculated by the following equation.
Threshold = (Teaching point A + Teaching point B) / 2
Hold, trigger mode, and scaling settings that have been made before teaching are reflected in the
teaching measurements.
Setting Teaching point A
1.
Set the teaching point A by following steps
4.
of the position teaching procedure.
Setting Threshold Values
2.
Place a defective sample in position.
The main display value changes.
3.
Press the ENT Key for at least three seconds
and then release.
The measured value at the point that the ENT Key is
released will be set as the value for teaching point B to
set threshold value.
This threshold value will be shown on the sub-display.
When [ERRLH] or [ERRHL] is displayedp.89
The threshold values set using two-point teaching can be changed using direct input. This is useful
when setting judgement tolerances for measured values.
p.89
Teaching point A
1.
to
DETAILED SETTINGS
Sensor head
Teaching point B
Defective
sample
SUB
SUB
Section 5
ZX-L-N
91
User's Manual