4VAL Operating & Maintenance Manual Version 1.1 © Newman Labelling Systems Ltd Page 18 of 56
3.7.5 MISSING LABEL FAULT
CAUSE: An unlabelled container has been detected. This could be due to either a
misapplied label or that there was a label missing from the web.
CHECKS: Check the containers before and after the one that caused the fault in case
two labels have been applied in error. Check for labels along the container path, on
fitments, drum etc. Check that labels are feeding correctly from reel and along the
label arm.
RESTART: Remove the unlabelled container from applicator drum. Acknowledge the
alarm message (Siemens: enter – Allen Bradley: reset). Press the machine start button.
Monitor label application after restart.
3.7.6 OVERPRINT FAULT
CAUSE: A missing / faulty overprint has been detected at the overprint sensor.
CHECKS: Check the printer is working correctly and that the sensor is positioned and
set correctly to detect the overprint on the label. Test fire a few labels, if necessary to
check.
RESTART: Remove the faulty label from the web. Acknowledge the alarm message
(Siemens: enter – Allen Bradley: reset). Press the machine start button. Monitor the
overprint detection after restart.
NB. Overprint detection can be by ‘overprint sensor’ or by vision system. The alarm
message is the same for both.
