3M Tape Application Monitor, Instructions And Parts List

Page: 26 / 62

North American - ENG
Date Released:
05-22-18
TAM Application Monitor - Yype 21800
Page 20
44-0009-2048-6 / ECO# 0078483
This section contains general information about the Tape
Application Monitoring System. For a more complete
description refer to Operation and adjustment Sections
of this manual.
This tape application monitoring system is PLC con-
trolled with the ability to signal or stop your 3M-Matic™
case sealer if the machine is running low on tape, if the
tape did not cut, or if tape was not applied as the box
passes through the case sealer.
The operation is based on information received from
the sensors supplied with this system. They sense the
presence of electrical current supplied to the case sealer,
the presence of a box as it passes through the machine,
the dispensing of tape from the supply roll and a low
level of tape on the supply roll. The system becomes
part of your 3M-Matic™ case sealer with no changes
required to your existing AccuGlide™ taping heads.
This system consists of a current sensor, a box presence
sensor and 2 dancer arm assemblies for monitoring tape
activity of both an upper and lower taping head. Each
sensor is independently adjustable for your speci fi c
application.
The dancer arm assemblies are spring loaded mecha-
nisms designed to remain in contact with the tape supply
rolls on your case sealer. A special “dancer arm roller”
is attached to the end of the "dancer arm" along with
a sensor to detect supply roll movement as the tape is
dispensed. A second sensor at the opposite end of the
arm senses the angular position of the dancer arm. As
the supply roll gets smaller the arm moves closer to the
sensor and the point you have selected to replace the roll.
The current sensor is located in the main control box
It is placed in-line with the case sealer’s power cord
wiring and is used to detect current fl ow and deter-
mine whether or not the case sealer is running. This
sensor allows the system to reset automatically after
a fault condition is corrected by simply restarting the
case sealer.
General
The PLC controller contains programs to interpret the
information received from these sensors. This system
has a setup menu for selecting the system con fi gura-
tion and operating parameters for the application.
Operational Explanation
The box present sensor assembly consists of a re fl ec-
tor and a sensor mounted on opposite sides of the
case sealer. The sensor LED turns "O ff " when a box
passes between the sensor and re fl ector. The assem-
bly is attached directly to the case sealer’s base frame
or column by means of a 3M™ VHB™ doubled sided
foam tape. The sensor and re fl ector must be posi-
tioned to detect the lowest height box without being
blocked by the action of the taping head. Refer to
the "Installation and Setup" section for recommended
mounting.
The spring loaded dancer arm assembly is mounted
adjacent to each taping head to be monitored.
The dancer arm roller is placed in contact with the
tape supply roll to monitor tape movement and
supply level. Seven targets spaced equally around
the circumference of the dancer arm roller, pass
the tape dispensing sensor to indicate when tape is
dispensed. The information obtained from the tape
dispensing sensor is used to calculate the tape apply
V1 (i.e. supply roll tape velocity while taped is being
applied) and tape cut V2 (i.e. supply roll tape velocity
after tape has been cut). The calculations occur at
two di ff erent points with information obtained from
the box presence sensor. The fi rst calculation for V1
begins when the leading edge of the box reaches the
tape cuto ff bracket and ends when the trailing edge
reaches the cuto ff bracket. The calculation for V2
begins at a point after the trailing edge has passed the
cuto ff bracket and ends after the time expires
on TH053. The tape apply and tape cut velocities
(V1 & V2) are run independently and compared to
preset values. A tape apply velocity less than or
tape cut velocity greater than these preset values
will generate a fault code and stop the case sealer.
Refer to Figures 3-1 through 3-3 and following
detailed explanation for further information.
Note: The following explanation is for both upper
and lower taping head monitoring. It includes
additional detail on program timers used to
delay the start of the velocity calculations for
the upper head due to the physical o ff set of
the upper and lower taping heads (upper
taping head is approximately 5 ½” behind the
lower taping head position/for Standard Position).
Theory of Operation
(continued)