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Adjustments 3M-Matic 800rf Case Sealer
3-22 Copyright 1999, 3M IPC. All rights reserved.
3-28. Low Air Pressure Switch
Specification
Adjust the Low Air Pressure Switch so the case sealer
shuts down if the main air pressure drops below 50
PSIG and a box feed is attempted.
ü Note
All adjustments to the Low Air Pressure Switch must
be made with the Main Air On/Off Valve in the Off
position.
Measurement
1. Set the Main Air Pressure Regulator Gauge to
read 50 PSIG.
2. With the electrical power and air pressure con-
nected, start the machine by pressing the RESET
button and then the START button.
The case sealer side drive motors should
NOT
start and the red RESET lamp should light.
3. Set the Main Air Pressure Regulator Gauge to
read 95 PSIG.
4. Start the machine by pressing the RESET button
and then the START button.
The case sealer should operate properly (RUN
light is on, motors are on, and side belts are
rotating). You should be able to convey a carton
through the machine and have it successfully seal
the top and bottom seams of the carton.
Adjustment
1. Turn the Main Air On/Off Valve to the Off
position.
2. Locate the adjusting screw on top of the Low Air
Pressure Switch and turn it fully CCW until it
stops, being careful not to damage the adjusting
screw. Refer to Figure 3-28.
3. Preset the adjusting screw by turning it 9 full
turns CW.
4. Connect the electrical power and air pressure,
turn the On/Off Air Valve to the On position, and
set the Main Air Pressure Regulator Gauge to
read 50 PSIG.
5. Press the RESET button and then the START
button. If the case sealer motors do not start, the
switch is set properly.
6. If the case sealer motors start at 50 PSIG, the Low
Air Pressure Switch is set too high and adjust-
ment is necessary.
a. Turn the Main Air On/Off Valve to the Off
position.
b. Turn the Low Air Pressure Switch adjusting
screw CCW by 1/2-turn increments and
repeat steps 4 and 5 until the motors do not
start.
7. Reset the Main Air Pressure Regulator Gauge to
read 95 PSIG and perform a final operational test
by running a carton through the case sealer.
Figure 3-28. Low Air Pressure Switch Adjustment