E3X-NH Datasheet, PDF (21/40 Pages) Omron Electronics LLC – Fine Tuning Fiber Photoelectric Sensor

E3X-NH
E3X-NH
Positioning/No-object Teaching
• Ideal if it is impossible to perform teaching with the sensing
object stationary in the sensing area.
• Ideal for high-precision positioning.
• Ideal for teaching with only background objects for the detection
of bright or dark objects.
Reflective (Light-ON) Fiber Unit
1. Press the SET button without sensing object in the sensing
area.
Tentatively set the threshold to the value that is ±6% of the in-
cident level.
Large
Through-beam (Dark-ON) Fiber Unit
1. Press the SET button without sensing object in the sensing
area.
Tentatively set the threshold to the value that is ±6% of the in-
cident level.
Large
Light
Small
Threshold
6%
6%
Threshold
Incident level without
background object
or sensing object.
Light
Small
Threshold
6%
6%
Threshold
Incident level without
background object
or sensing object.
Note:
If the incident is low at the time of teaching and the threshold
cannot be set to the position corresponding to -6% of the
incident level, the sensitivity will be set to maximum auto-
matically when the E3X-NH is in RUN mode.
2. Detecting the first object in RUN/ADJ mode.
Large
Light
Small
Sensing object
The Photoelec-
tric Sensor
works in reflec-
tive operation
because the in-
cident in-
creases.
Threshold
6%
The number of lit
indicators of the inci-
dent level indicators
depends on the inci-
dent. The threshold
is set to 7.
18%
18%
Tuning
range
Incident Threshold
level indicator
indicator
Note:
If the incident is low at the time of teaching and the threshold
cannot be set to the position corresponding to -6% of the
incident level, the sensitivity will be set to maximum auto-
matically when the E3X-NH is in RUN mode.
2. Detecting the first object in RUN/ADJ mode.
Large
Light
Small
Incident Threshold
level indicator
indicator
6%
Threshold
18%
18%
Tuning
range
The Photoelectric
Sensor works in
through-beam
operation
because the inci-
dent decreases.
Sensing object
The number of lit
indicators of the inci-
dent level indicators
depends on the inci-
dent. The threshold
is set to 7.
Threshold vs. Indicators after Auto-tuning Setting
1. Set the initial threshold by performing positioning/no-object teaching in TEACH mode.
2. Press the SET button for three seconds minimum in ADJ mode.
Large
Tuning
range
Light
Small
Threshold
Initial threshold
for auto-tuning
18%
18%
Incident Threshold
level indicator
indicator
The number of lit indicators of the
incident level indicators depends
on the incident. The threshold is
set to 7.
Taking into consideration the vibration of the sensing objects on the in-line operation, sample the incident with the first five sensing ob-
jects after setting the threshold and set the threshold again to the middle value between the highest and lowest incident values obtained
with the sensing objects. The E3X-NH will then perform auto-tuning within a range of ±18% of this value.
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