Rockwell Automation 45LFM Label Photoelectric Sensor - Manual (Page 3)

3
Setting Up the Sensor
BASIC SETUP: When labels are moving through a properly setup sensor, the
lights on the display will move back and forth between WEB and LABEL. The goal of
setup is to SHIFT the position and adjust the SPAN of the moving display lights so that the lights go from WEB to
LABEL and do not ever stop in the X area between WEB and LABEL. The adjustment process is slightly different
for different types of labels. If you want more specific instructions, see below.
Read this first:
Labels Without Metal: (a few inks can behave like metal in
the sensor, use the combination setup in those cases)
1. Move labels through the sensor (if moving labels back and
forth be sure at least one complete label and the gap on
each side of it are passing all the way through the sensor).
2. Adjust SHIFT to center the light movement on the display.
3. lf end points of the light movement are in the X area,
increase SPAN (Fig 3).
4. lf end points of the light movement are the far outside lights,
decrease SPAN (Fig. 2)
Fig. 1
Ideal Setup
SPAN
+
W
_
L
SHIFT
SPAN
+
W
_
L
SHIFT
SPAN
+
W
_
L
SHIFT
Fig. 2
Too much span
Fig. 3
Too little span and
not centered
All Metal Labels ( Metallic label material ):
1. Set SPAN to minimum by turning SPAN at least 4 rotations
toward the “–” mark.
2. lt is important that metal labels be tight against the backing
plate during setup and operation.
3. Move labels through the sensor (if moving labels back and
forth be sure at least one complete label and the gap on
each side of it are passing all the way through the sensor).
4. Adjust SHIFT to center the light movement on the display.
5. End points of the light movement will usually be between
the far outside lights. This is normal for full metal labels
(Fig. 4).
6. If the light movement is not between the far outside lights,
increase SPAN until it is (Fig. 4).
SPAN
+
W
_
L
SHIFT
Fig. 4
Metallic label setup
Combination Labels with Some Metal: (or inks that behave
like metal)
1. Move labels through the sensor (if moving labels back and
forth be sure at least one complete label and the gap on
each side of it are passing all the way through the sensor).
2. Adjust SHIFT to center the light movement on the display.
3. Metallic areas will cause the light movement to go to the
end light. lf nonmetallic points (seen as intermediate
stopping points of the light movement) are in the X area,
increase SPAN.
4. lf nonmetallic points (seen as intermediate stopping points
of the light movement) are not seen, decrease SPAN.
SPAN
+
W
_
L
SHIFT
Fig. 5
Combination
(partial metal)
labels
Metallic label part
Nonmetallic label part