Troubleshooting - 3M -Matic a20 Instructions And Parts List

12-OPERATION (continued)
12.9 Troubleshooting Guide
12-OPERATION
PROBLEM
Drive belts do
not convey boxes
Drive belts do
not turn
Upper and lower
taping head
mechanisms
interfere with
each other
Drive belts break
Light boxes tip
back on exit
Squeaking noise
as boxes pass
through machine
a20-NA
CAUSE
Narrow boxes
Worn drive belts or friction rings
Top taping head does not apply
enough pressure
Top fl ap compression roller too tight
Taping head applying spring holder
missing
Taping head applying spring set too
high
Worn or missing friction rings
Drive belt tension too low
Electrical disconnect
Motor not turning
Motor capacitor
Motor fan cover dented
Machine's minimum height stop
does not match tape head leg
length setting
Worn belt
Improper setup causing boxes to jam
Upper head assembly down too far
Dry compression rollers
Dry column bearings
Defective column bearings
Check machine specifi cations.
Boxes are narrower than
recommended causing slippage
and premature belt wear
Replace drive belts or friction rings
Adjust the box height adjustment
using the crank handle
Readjust compression rollers
Replace spring holder
Reduce spring pressure
Replace friction rings
Adjust belt tension
Check power and electrical plug
Evaluate and correct
Check manual to make sure
taping heads match machine setting
Replace belt
Carefully adjust upper
head assembly
Lubricate compression rollers
Lubricate column bearings
Replace column bearings
26
CORRECTION
2011 April