Adjusting the Movable Sensor for Black Marks or Notches
Adjusting the Movable Sensor for Black Marks or Notches
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Adjusting the Movable Sensor for Black Marks or Notches

The movable sensor is a dual-function sensor that provides transmissive (sees through media) and reflective media sensing. The printer can use only one of these two sensing methods at any given time. If printing on black mark media, the movable sensor must be adjusted to sense the marks or notches on the media.
Black-mark sensing looks for nonreflective surfaces such as black marks, black lines, notches, or holes on the back of the media which do not reflect the sensor’s near-infrared light beam back to the sensor’s detector. The sensor light and its black-mark detector are positioned next to each other under the sensor cover.
The sensor has single sensor position for Web/Gap media which is its Default position.
The design of the sensor allows the printer to use media with black marks or notches (holes through the media) on the back side of the media (or media liner). The sensor aligns to the middle of the black marks or notches (not to the center of the media roll). This is to avoid Web/Gap sensing array.
  1. Position the movable sensor’s alignment arrow to the middle of the black mark or notch in the underside of the media.
  2. Verify that you have set the sensor alignment as far as possible from the edge of the media but where 100% of the sensor window is covered by the mark.
    There are 3" and 4" marks.
When printing, the media can move from side to side ±1 mm (due to media variations and edge damage due to handling). Notches cut into the side of the media can also become damaged.