3M Matic 7000r Instructions And Parts List page 46

8. Theory of Operation
(continued)
Box Present Photo Sensor:
Box Present Photo Sensor detects start
of tape application cycle (Figure 8-9).
Box Centering Photo Sensor:
As box proceeds through taping process
and front edge of box passes the centering
photo sensor, box centering guides are
activated. As box trailing edge passes the
box centering photo sensor, the guides are
deactivated releasing centering solenoid
valve (Figure 8-9). The centering guides
then are returned to their original open
position (Figure 8-10).
Note: For Longer Boxes, Centering Guides
are automatically released after a
set period of time.
Blade Retract (Cut-Off ) Photo Sensors:
As the box is conveyed through machine,
the leading edge of box is detected by the
Blade Retract (Cut-Off ) Photo Sensor.
The PLC energizes the blade retract solenoid
valve which retracts blade cut-off bracket
(preventing crushing of box - Figure 8-10).
When the trailing edge of box is detected
by Blade Retract (Cut-Off ) Photo Sensors,
the Programmable Logic Controller
program (PLC) deactivates the blade retract
solenoid valve cutting the tape which
completes the taping process (Figure 8-11).
Note: Both Upper and Lower Taping Heads
have a photo sensor. These sensors
are spaced in direct proportion to the
off set position of taping heads.
Box Exit Photo Sensor:
As the trailing edge of box passes the
Box Exit Photo Sensor, a signal is sent to
PLC that taping cycle has been completed
(Figure 8-12).
Note: A Programmed (PLC) "Watch Dog"
timer will stop machine:
1) Box taping cycle is not completed
2) Box Jam
3) Any abnormal "event"
A manually activated E-Stop (emergency stop)
is also provided for any abnormal events.
Note: Also refer to Manual 2
for Taping Head adjustments.
3M-Matic 7000r-7000r3 HS Pro - Type 11800
™
Page 34
44-0009-2152-6 / ECO# 0078045
within set period of time.
Box Present
Photo Sensor
Box Centering
Photo Sensor
Upper Tape Head
Retract (Cut-Off )
Photo Sensor
Upper Tape Head
Retract (Cut-Off )
Photo Sensor
Box Exit
Photo Sensor
Figure 8-12
Figure 8-9
Figure 8-10
Lower Tape Head
Retract (Cut-Off )
Photo Sensor
Figure 8-11
Lower Tape Head
Retract (Cut-Off )
Photo Sensor
North American - ENG
Date Released:
05-22-18