Specifications

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2.12.2 Detections
Marker Detection
This function detects a marker which is pre-printed on the back of the paper roll in order to align
the print position. If no marker can be detected within 30 cm of a paper feed after this marker
detecting function has been carried out, the marker detection error is output and the printer
operation stops. To perform marker detection use the library function.
The marker width to detect differs depending on whether back barcode is enabled or disabled.
When back barcode is disabled: 5 mm
When back barcode is enabled: 10 mm
The following market detection modes can be specified using ESC commands.
Marker end detection When marker detection is performed, the marker is detected when it has passed
over the marker sensor
Marker beginning
detection
When marker detection is performed, the marker is detected when it enters the
area over the marker sensor
The marker detection mode can be set in the registry. When the printer opens, the value is
acquired from the registry and acted on. The setting value can also be changed using an ESC
command, but the change will not be saved in the registry.
Notes:
• If an error (including a suspend process) occurs during detecting a marker, the marker
detecting operation stops and an error is returned.
• The marker detecting operation must be carried out when data to be printed (ex. Right after
opening the printer or right after all data are output for printing) do not exist in the buffer.
• When marker beginning detection is set, detection of markers (black) that are less than the
marker width when marker detection is performed is stopped. Therefore, this cannot be used
with paper that has black areas other than markers, such as paper with a back barcode. Only
use this mode to adjust the print start position when using paper from a previous model that
has a print start position different from the IT-9000.
Prior to producing your own formed papers that feature the marker detection, refer to Chapter
2.14.6 “Guide Line to Producing Formed Papers”.
The function of the Printer Library relevant to the “Marker Detection” is as follows.
PRNCheckMarker
: Feeds paper to marker position.
Closed mode Open mode
Setting value: Registry value
Open mode
Setting value: Changed value
Printer open
Printer closed
Printer closed
Setting change (ESC command)