WF-10T
Case Former
Machine Maintenance
9-83
9.3
Machine Sequence Troubleshooting
The machine sequence is controlled by a PLC located inside the electrical enclosure. The
controller responds to inputs from the panel buttons and various sensors on the machine
mechanisms, and it provides outputs that control the solenoid valves in the pneumatic system.
The most common reason for machine sequence malfunction is incorrect sensor operation. The
following series of ‘quick checks’ can be carried out by simply observing the rear of the sensor to
see if it is illuminated when it should be.
This procedure requires access to the inside of the control enclosure in order to observe I/O
signals on the programmable logic controller, and should only be attempted by a qualified
electrician adhering strictly to proper safety procedures.
To troubleshoot the machine sequence, refer to Section 6.2:
While in
JOG
mode, step the machine through its operating sequence by pressing the
‘START’
button briefly for each step. Follow the sequential listing starting on the next page to investigate
any problems that may occur.
Table 27: Machine Sequence Troubleshooting
Step
Sequence
Problem
Description
Remedial Action
Machine will
not start
Machine has
sufficient power
and air pressure,
but will not start.
Magazine case supply
too low; Empty
Magazine Fault.
Load more case
blanks and then
press ‘
RESET’
.
Either Bottom Flap
Height Dimension ‘M’
datum set too high or
Case Blank Height
Dimension ‘B’ set too
low.
Adjust Dimension ‘B’
up to suit actual
case blank height or
adjust Dimension ‘B’
to measured height
of case blank.
Case buckles when
case separator pushes
it into caliper slot.
Insufficient down-
force applied to case
blanks in magazine;
add more cases and
ensure that cases
are tight against the
backing plate.
Case
Separation
Case buckles when
case separator
elevates case blank
into caliper slot.
Injector
DOWN
speed
too fast.
Set for moderate
injection speed.
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