3M Tape Application Monitor, Инструкция и перечень запасных частей

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North American - ENG
Date Released:
05-22-18
TAM Application Monitor - Yype 21800
Page 21
44-0009-2048-6 / ECO# 0078483
The typical installation and taping head orientation is
shown in Figure 3-1. The box enters the case sealer
from right to left in the illustrations. The leading edge
of the box is detected by the box present sensor
(Figure 3-2) starting timer TH051. Timer TH051 is
adjustable and represents the time required for the
box to travel from the sensor to the taping head
cuto ff bracket (based on the belt speed).
The PLC begins counting pulses the instant TH051
"times out". The pulses are accumulated from the
lower tape dispense sensor as the tape supply roll
rotates. These pulses are counted until the trailing
edge of the box passes the taping head cuto ff bracket
(Figure 3-3). The tape, at this point, has not been cut
and the tape apply velocity (V1) is calculated.
V1 = (Pulses) * (Encoder Constant)
Elapsed Time
Encoder Constant = linear travel distance per pulse
of the dancer arm roller.
Elapsed Time = Time from the sensing of the leading
edge to the trailing edge of the box.
There are three (3) software
fi lters used to determine
that the tape applied successfully between positions
illustrated in Figures 3-2 to 3-3. A fault will be
generated if either condition is satis fi ed.
The fi rst fi lter is a general calculation that compares
the calculated velocity (V1) to a preset V1min.
If (V1) is less than or equal to (V1min) the system will
generate a NO APPLY fault and stop the case sealer.
Note: (V1min) is set at half the expected belt speed.
For your 3M-Matic case sealer that runs at
15in/sec, (V1min) is set to 7 in/sec.
The second fi lter is used to ensure tape was dispensed
continuously as the box passed through the case
sealer. The Elapsed Time and pulse count are divided
into smaller segments. If at least one pulse was mea-
sured during the last segment of the apply cycle (i.e.
just before the tape is cut) then tape was successfully
applied to the box. If the pulse(s)
measured during the last segment of time equals
zero a NO APPLY fault is generated.
The last fi lter used is to determine if the tape was suc-
cessfully cut. As the trailing edge of the box passes
the taping head cuto ff bracket (Figure 3-3) timer
TH052 starts. This timer is similar to TH051 and rep-
resents the amount of dwell time after the apply cycle
has completed and the cut cycle begins.
Figure 3-1
Figure 3-2
Figure 3-3
Upper and Lower Tape Head Monitoring
(Detailed description)
Theory of Operation
(continued)