CROSS
BEAM LABEL DETECTORS
P/N
22353
P/N
32769
Kit,
Label Inspection,
Cross
Beam
Kit,
X
-
Beam, Head Mounted
System
Descriptions
The Cross Beam Label Detector, P/N 22353, (Figure
1),
and the
Head
-
Mounted Cross Beam Label Detector, P/N 32769, (Figure
2),
are optional accessories for the FT
-
50 system. The Cross
Beam Label Detector is mounted on the Kit, Mounting Bracket,
Inspection Station,
P/N
22344. The Head Mounted Cross Beam
Label Detector is mounted on blocks bolted to the FT
-
50's
bottom. Both Label Detectors are operated by the FT
-
50. Both
Label Detectors check bottles that are transparent
to
infrared
radiation for the presence of body labels.
Each Label Detector uses two infrared photoelectric transmitters
and
two
infrared receivers, placed diagonally
at
45°
to
the flow
of bottles on the conveyor. Each transmitter transmits across the
Production Conveyor to its receiver. When
a
liquid
-
filled
transparent unlabeled bottle passes between
a
transmitter and its
receiver, the transmitter's light beam refracts away from the
receiver, except during
a
brief interval when the beam
is
passing
straight through the bottle's centerline.
If
the bottle
has
a
body
label, no infrared light reaches the receiver during this
centerline
interval. Each transmitter
-
receiver
pair
is connected
to
a
Photo Amplifier
(P/N 19140).
Both Label Detectors each
have two Photo Amplifiers; they are located either in the
Inspection Station Electronic Enclosure (Label Detector P/N
22353) or in the
FT
-
50
(Label Detector P/N 32769).
In
the Label
Detector
P/N
22353, the outputs from both Photo Amplifiers are
combined (logically OR’ed) onto
a
single FT
-
50 Sensor input
line. In the Label Detector P/N 32769, each Photo Amplifier
output is connected to
a
separate FT
-
50 Sensor input line. The
FT
-
50 compares the logic state of the Sensor input line (Label
Detector P/N 22353) or the logic state of each of the two Sensor
input lines (Label Detector P/N 32769) to an internal table to
determine if the bottle should be accepted
or
rejected.
Power
(+20 VDC)
and a Ground reference are supplied by the
FT
-
50 Main Terminal Block
TB1,
through the cable connecting
the FT
-
50
to
the Inspection Station JunctionBox.
Both Label Detectors require that
a
High Resolution Encoder
(Assembly
P/N
24997, Installation
Kit
P/N
24444), driven by the
Production Conveyor, be connected
to
the FT
-
50. The High
Resolution Encoder is installed per Installation Drawing I-00425.
The Encoder enables the FT
-
50 to precisely track when each
bottle's centerline is passing through the cross beam measure
-
Industrial Dynamics Company
Ltd. Document 3003-0395
I
