AMT Datasouth Fastmark M9 Plus User Manual page 68

The printing position of
small labels is incorrect
* Media sensor sensitivity is
not set properly.
* Label size is incorrect.
* The parameter Shift Y in the
LCD menu is incorrect.
* The vertical offset setting in
the driver is incorrect.
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* Calibrate the sensor sensitivity again.
* Set the correct label size and gap size.
[Menu] →[Setting] → [Shift Y] →
* Press
to fine tune the parameter of Shift Y.
* If using the software BarTender, please
set the vertical offset in the driver.