Novexx Solutions ALX 92x, Service Manual

Page: 77 / 824

04/16 Rev. 06 USER MANUAL Advanced Applications
AP 4.4 – AP 5.4 – AP 5.6 – AP 7.t – 64-xx – DPM – PEM – ALX 92x
2
Printing with temperature compensation
Requirements
• Suitable printers: All devices listed in the headline of this document
• Firmware: All versions
Function description
The print contrast is heavily dependent on the temperature of the printhead. This can
be set using the parameter
SYSTEM PARAMETERS > Print contrast
or in the online mode
after pressing the Esc button.
When the printer is being used for a big print job, the temperature of the printhead and
the print contrast increase during printing. This increase is greater, the larger the print-
job and the larger the amount of black to be printed.
In extreme cases, this rise in temperature can lead to smearing in fine structures when
printed, e.g. barcodes arranged crosswise to the printing direction. To avoid this, the
firmware constantly checks and corrects the printhead temperature. The precondition
for this is that the parameter
SYSTEM PARAMETERS > Temp. reduction
is set to a value > 0
(Default: 20%).

The temperature compensation is the greater, the higher the setting of the param-
eter
SYSTEM PARAMETERS > Temp. reduction
is [1].
Parameter Function
SYSTEM PARAMETERS >
Print contrast
Sets the print contrast, i.e. indirectly, the printhead tem-
perature (actually adjusts the driving power of the prin-
thead).
SYSTEM PARAMETERS >
Temp. reduction
Sets the correction factor for the temperature compensa-
tion. The higher the selected setting, the greater the re-
duction of the driving power when the printhead
temperature rises.
[Tab. 1] Parameters for setting the temperature compensation.