Carl Valentin Vario II series, Service Manual

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Service Manual
38
Adjustment of printhead Flat Type KF
Parallelism
An important characteristic for a high quality print is the parallelism of the focal line of the thermal
printhead to the pressure roll. Because of the fact that the position of focal line of the printhead
depends on fluctuations caused by production, it is necessary to set the parallelism.
By means of a hexagon key unscrew the screws (A) by approx. ½ turn.
With the adjusting screws (F) it is possible to set the parallelism.
Turn in clockwise direction and the printhead moves backwards.
Turn anticlockwise and the printhead moves forwards.
Depending on the print quality of the test print, turn the screws as long as the print quality comes up to
your full expectation.
Screw again the screws (A).
Start a print order with approx. 5 to 10 labels and control the correct and wrinkle free ribbon. In case of
wrinkles then you have again to check parallelism.
Pressure balance right/left
After adjusting parallelism and no even strong pressure exists over the complete print width, by means
of a plate (I) you can set the balance as follows:
Unplug the machine.
Remove the left cover of the printer.
Use 2 screws an the left upper printer edge and 2 screws at the upper edge of chassis.
Remove the protective conductor at the inside of the printer cover.
Unscrew with a screwdriver SW7 the screws (J, K) by approx. ¼ turn.
By means of an eccentric pin (L) you can create by turning a balance of pressure.
Adjust the printing corresponding to the test print as long as this results in an even printing.
Screw again screws (J, K).
Attention: For the following test prints you have to insert the protective conductor at the inside of the
printer cover and for security to push it over the chassis.
Start a print order with approx. 5 to 10 labels and control the correct and wrinkle free ribbon. In case of
wrinkles then you have again to check parallelism or balance of pressure.