8-6 Printing Faults Rev AB
Videojet 8520 Operator Manual
Changes made
to the job are not
printed
The changes were not loaded to
the print memory.
Reselect the job using the menu from
the Home screen.
Shadow print The print direction has been
incorrectly set in the system
settings.
Change the print direction for the
printhead concerned in the system
settings.
Incorrect number of lines set for
the encoder.
Adjust the system settings to the shaft
encoder and/or the drive disc.
The shaft encoder drive disc
slips. The speed is not
measured correctly.
Make sure that the drive disc is firmly
pressed onto the product conveyor belt.
If the pressing pressure on the belt is
excessive, however, this may destroy
the shaft encoder bearings.
The measuring wheel of the
shaft encoder does not run
parallel to the belt. This results
in excessive slippage and a
false speed signal.
Set the direction of running of the
measuring wheel to be parallel to the
belt.
Prints are made without the
shaft encoder. The product
speed set in the system settings
is different to the actual product
speed.
Please check the actual product speed
and adjust accordingly.
The resolution setting referring
to the speed is too high.
Reduce the resolution or the delivery
rate.
The print image
is printed upside
down
The orientation setting has been
incorrectly set in the system
settings.
Check the system settings and change
them if required.
The print image
is back-to-front
The Mirrored setting has been
incorrectly set in the system
settings.
Check the system settings and change
them if required.
The print
position is
incorrect
The sensor distance is incorrect Measure the actual values and adjust
the setting.
The registration is incorrect. Measure the actual values and adjust
the setting.
The product does not pass the
sensor on the belt with a
uniform alignment. The
misalignment of the product
causes the print to trigger too
early or too late.
Ensure that the products are better
aligned while being conveyed. Fit or
readjust guide rails if necessary.
Fault Cause Solution
Table 8-1: Printing Faults (Continued)
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