Zebra Technologies GX420T - Manual (Page 64)

Printer Options
Moveable Blackline Sensor Option 52
980612-001 Rev. A GX420t / GX430t User Guide 12/14/07
Adjusting the Moveable Blackline Sensor for Black Mark or Notches
Load the media. Before closing the printer, adjust the moveable blackline sensor as follows:
1. Flip the media back over the roll to expose the black marks on the backside (non printing
side) of the media. This is not required for notched media.
2. Slide the moveable sensor from the center default position to align with the black marks.
The arrow on the moveable sensor should line up with the right edge of the black mark for
marks on either side of the media (left side show).
Black Marks